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Friday, May 01, 2020



The Lost Land of Lemuria: Fabulous Geographies, Catastrophic Histories
Sumathi Ramaswamy
Copyright Date: 2004
Published by: University of California Press
Pages: 351
https://www.jstor.org/stable/10.1525/j.ctt1pnqbz
About the Book
During the nineteenth century, Lemuria was imagined as a land that once bridged India and Africa but disappeared into the ocean millennia ago, much like Atlantis. A sustained meditation on a lost place from a lost time, this elegantly written book is the first to explore Lemuria’s incarnations across cultures, from Victorian-era science to Euro-American occultism to colonial and postcolonial India. The Lost Land of Lemuria widens into a provocative exploration of the poetics and politics of loss to consider how this sentiment manifests itself in a fascination with vanished homelands, hidden civilizations, and forgotten peoples. More than a consideration of nostalgia, it shows how ideas once entertained but later discarded in the metropole can travel to the periphery—and can be appropriated by those seeking to construct a meaningful world within the disenchantment of modernity. Sumathi Ramaswamy ultimately reveals how loss itself has become a condition of modernity, compelling us to rethink the politics of imagination and creativity in our day.


About the Author
Sumathi Ramaswamy is Associate Professor of History at the University of Michigan, Ann Arbor, editor of Beyond Appearances: Visual Practices and Ideologies in Modern India (2003), and author of Passions of the Tongue: Language Devotion in Tamil India, 1891–1970 (California, 1997).

Lost Land Of Lemuria.pdf - PDF Drive
https://www.pdfdrive.com › lost-land-of-lemuriapdf-e19236703
832 Pages·2011·22.38 MB·49,504 Downloads. Lost Books of the Bible: The Great Rejected Texts. Table of Contents. Section One. Lost Scriptures The .

Lost Land and the Myth of Kumari Kandam
S.C. JAYAKARAN
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.730.452&rep=rep1&type=pdf
Abstract: The concept of Lemuria was born in the 1860s when certain British geologists noted the striking similarity between rock formations and fossils found in India and Africa. There is confusion between the concept of the lost land south of India linked with the literary history of Tamil tradition and the myth of the lost land of Lemuria. With reference to the records of sea level fluctuations, climatic changes, glacial advances and glacial retreats, this article tries to trace the factors that had given rise to the myth of Kumari Kandam and briefly touches upon the development of the European concept of Lemuria that found its way into the Tamil literary tradition

The Lost Continent of Kumari Kandam | Ancient Origins
https://www.ancient-origins.net › myths-legends › lost-continent-kumari-k...
According to the stories, there was a portion of land that was once ruled by the Pandiyan kings and was swallowed by the sea. When narratives about Lemuria ...



Jan 3, 2016 - Download Full PDF EBOOK here { http://bit.ly/2m6jJ5M } . ... Lemuria is the name of a hypothetical "lost land" variously located in the Indian and ...

JOURNAL OF ASIAN STUDIES
Volume 64, Issue 3
August 2005 , pp. 787-789
The Lost Land of Lemuria: Fabulous Geographies, Catastrophic Histories. By Sumathi Ramaswamy. Berkeley and Los Angeles: University of California Press, 2004. xvii, 334 pp. $60.00 (cloth).
Kristin Bloomer (a1)
DOI: https://doi.org/10.1017/S0021911805002032
Published online by Cambridge University Press: 02 March 20

(PDF) Review of The Lost Land of Lemuria: Fabulous ...
www.academia.edu › Review_of_The_Lost_Land_of_Lemuria_Fabulous_G...
Review of The Lost Land of Lemuria: Fabulous Geographies, Catastrophic Histories, by Sumathi Ramaswamy. Rick Weiss.

The Lost Land of Lemuria: Fabulous Geographies, Catastrophic Histories (review)
Mary Elizabeth Hancock
Journal of Interdisciplinary History
The MIT Press
Volume 37, Number 3, Winter 2007
pp. 495-496
https://muse.jhu.edu/article/205706/pdf

RAMASWAMY, SUMATHI, The Lost Land of Lemuria: Fabulous Geographies, Catastrophic Histories, Berkeley: UC Press. 2004. Pp. xvii, 334. $21.95
2006
Author(s): York, Laura
https://escholarship.org/uc/item/5sx8385h


Barrow on Ramaswamy, 'The Lost Land of Lemuria: Fabulous ...
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The Lost Land of Lemuria: Fabulous Geographies, Catastrophic Histories. Berkeley: University of California Press, 2004. xvii + 332 pp. ISBN 978-0-520-24032-2 ...

Sumathi Ramaswamy, The Lost Land of Lemuria - Chicago ...
www.journals.uchicago.edu › doi › pdf
The Lost Land of Lemuria: Fabulous Geographies, Catastrophic Histories. By Sumathi Ramaswamy. Berkeley: University of California Press, 2004. Pp. xvii+334.




Lemuria. A modern journey to a lost continent. Lemuria. Lemuria was given it's name in the 1800s, they used lost continent as an explanation for the inconsistent ...

Rudolf Steiner – Atlantis and Lemuria
www.tbm100.org › Lib › Ste11
by R STEINER - ‎1911 - ‎Cited by 2 - ‎Related articles
These remarkable "lost" root races developed the first concepts of "good" and "evil," ... To-day it is this land which forms the bottom of the Atlantic Ocean.

The lost continents of Atlantis and Lemuria - Anthroposophical ...
https://www.anthroposophy.ca › wp-content › uploads › 2018/04 › Keppie...
Paul, Ascension, and Tristan d'Acunha are the peaks of this land which still remain above water. A line of 3,500 fathoms, or say 21,000 feet, is required to sound ..



Their land was once much, much bigger, but it was sunk into the sea by Uoke because of the sins of its inhabitants. Not only legends, but the Earth itself testifies to ..


by A Crowley - ‎Cited by 8 - ‎Related articles
PDF Creator Stanton Studios www.bonatus.com Find more books. LIBER ... declare, so far as may found possible, the truth about that mysterious lost land. ... The root is the Lemurian "Tla" or "Tlas", black, for reasons which will appear in due.
HINDU ATTACK ON TAMIL LEMURIAN LEGENDS
The Lemuria myth - Frontline
https://frontline.thehindu.com › the-nation › article30175192
Apr 22, 2011 - THE LEMURIAN AS conceived by W. Scott Elliot, a staunch Theosophist who published, in 1904, 'The Lost Lemuria'. ... Trying to explain the presence of fossil lemurs in Madagascar, he proposed that the Indian Ocean ... Kerala government passes ordinance to defer payment of part of its employees' salary.

The Lost Continent of Lemuria is an academic paper written and designed by Lita Ledesma for “History of the Western Book,” a graduate course taught by Casey Smith at the Corcoran College of Art & Design in the Fall 2012 semester.
https://issuu.com/litaledesma/docs/lemuria


Lost Continents & Sunken Civilizations - MSU Anthropology
anthropology.msu.edu › anp364-fs17 › files › 2012/10 › ANP364-Lost-C...

➁ CONNECTING THE MAYA TO LOST LANDS AND ADVANCED. CIVILIZATIONS ... LEMURIA. (THE OTHER LOST CONTINENT…AND THE LAND THE OF.


SCIENTIFIC AMERICAN BLOG
History of Geology
A Geologist's Dream: The Lost Continent of Lemuria
By David Bressan on May 10, 2013
https://blogs.scientificamerican.com/history-of-geology/a-geologists-dream-the-lost-continent-of-lemuria/

"Yet if hope has flown away
In a night, or in a day,
In a vision, or in none,
Is it therefore the less gone?
All that we see or seem
Is but a dream within a dream."

"A Dream Within A Dream"
by Edgar Allan Poe (1809-1849)

There is lot fuzz about the discovery of a slab of granite embedded into basaltic rocks of the oceanic crust - granite is a rock typical of continental crust (including island arcs), which prompted journalists to claim the discovery of a sunken continent (and no, dear journalists, granite is not formed on dry land, as plutonic rocks crystallize in the underground). Already Alfred Wegener demonstrated that continents can't simply sink, as granite has a lower mass density (2,7g/cc) it will "float" on the denser mantle materials (3g/cc).

However in past centuries lost continents were at least a geological possibility.

In the 19th century naturalists realized that many similar animals were distributed on different continents or remote islands. For short distances this was explainable by (voluntary or involuntarily) migration across the sea by "hopping" from island to island, but many distances were too great for large terrestrial animals, especially for mammals.

The British lawyer and zoologist Philip Lutley Sclater (1829-1913) noted the particular distribution of a particular group of primates - the Lemurs. Sclater however included in his Lemuridae more species than modern zoologists - the Lemurs, the Indri and the Aye-aye (found on Madagascar and shown above in a figure from SCLATER 1899), the Galagos (found in Africa), the Loris (found in Asia) and the Tarsiers (found in Indonesia). He observed that "while 30 different species of Lemurs are found in Madagascar alone, all of Africa contains some 11 or 12, while the Indian region has only 3." In a short essay of 1864 titled "The Mammals of Madagascar", published in the "The Quarterly Journal of Science", he provided a possible answer - Madagascar, with it's rich diversity of species, was the primordial homeland of lemurs which spread all over Asia and Africa by a land bridge connecting once these continents - he speculated even on a connection to America. He named this supposed land bridge/continent appropriately "Lemuria".

"The anomalies of the Mammal fauna of Madagascar can best be explained by supposing that anterior to the existence of Africa in its present shape, a large continent occupied parts of the Atlantic and Indian Oceans stretching out towards (what is now) America to the west, and to India and its islands on the east; that this continent was broken up into islands, of which some have became amalgamated with the present continent of Africa, and some, possibly, with what is now Asia; and that in Madagascar and the Mascarene Islands we have existing relics of this great continent, for which as the original focus of the "Stirps Lemurum," I should propose the name Lemuria!"

In later works he was more cautious:

"This fact would seem to show that the ancient "Lemuria", as the hypothetical continent which was originally the home of the Lemurs has been termed, must have extended across the Indian Ocean and the Indian Peninsula to the further side of the Bay of Bengal and over the great islands of the Indian Archipelago."

SCLATER & SCLATER (1899): "The Geography of Mammals."

Sclater was not the first to promote ancient land bridges or even a sunken continent in the Indian Ocean, as the idea of oceans as drown landmasses was a plausible geological theory at the time.

The French geologist Etienne Geoffrey Saint-Hilaire had speculated about a connection between Madagascar and India in 1840, the English geologist Searles V. Wood (1830-1884) hypothesized the existence of a giant southern continent during the "secondary era" (our Mesozoic). Alfred R. Wallace (1823-1913) proposed in 1859 a sunken continent to explain the fauna found on the island of Celebes, but became later one of the most eloquent critics of the theory of sunken landmasses.

In 1868 the German biologist Ernst Haeckel published his "Natürliche Schöpfungsgeschichte" (The history of Creation), addressed to a general public where he promoted his view of evolution. Haeckel considered the earliest humans descending from Asian primates and placed the cradle of humanity in Asia, Africa and very cautiously on the hypothetical island between these two continents. Lemuria played a major role as possible migration route of humans into Africa and Indonesia.

In later editions and the English version of the book, translated by Ray Lankester in 1876, the supposed continent is even emphasised and labelled in the map as "Paradise" and displayed as cradle of humanity.

"The primeval home, or the "Centre of Creation", of the Malays must be looked for in the south-eastern part of the Asiatic continent, or possibly in the more extensive continent which existed at the time when further India was directly connected with the Sunda Archipelago and eastern Lemuria."

HAECKEL (1876): "The history of Creation."

Fig.2. and 3. Ernst Haeckel, "A hypothetical sketch of the monophyletic origin and extension of the twelve races of Man from Lemuria over Earth", from "Natürliche Schöpfungsgeschichte", Plate XV. Note the differences in the German version (1868) without Lemuria and the English version (1876) with Lemuria, after 1870 Haeckel adopted and promoted the idea of a sunken continent in the Indian Ocean (image in public domain).

"The probable primeval home or "Paradise" is here assumed to be Lemuria, a tropical continent at present lying below the level of the Indian Ocean, the former existence of which in the tertiary period seems very probable from numerous facts in animal and vegetable geography. But it is also very possible that the hypothetical "cradle of the human race" lay further to the east (in Hindostan or Further India), or further to the west (in eastern Africa)."

HAECKEL in 1870.

Haeckels work, as vague at is was, however spread the idea of sunken continents to a larger public, still in 1919 the British author Herbert George Wells wrote:

"We do not know yet the region in which the ancestors of the brownish Neolithic peoples worked their way up from the Palaeolithic stage of human development. Probably it was somewhere about south-western Asia, or in some region now submerged beneath the Mediterranean Sea or the Indian Ocean, that, while the Neanderthal men still lived their hard lives in the bleak climate of a glaciated Europe, the ancestors, of the white men developed the rude arts of their Later Palaeolithic period."

WELLS (1919): "Outline of History."

The idea of Lemuria, as lost cradle of humankind, was too intriguing for pseudoscientific and esoteric groups and authors not to be incorporated in their worldview.


In 1888 the Russian medium Elena Petrovna Blavatskaja (1831-1891), strongly influenced by Asian philosophy, published her book on "The secret doctrine", in which she proposes Lemuria as the cradle of one of the seven races of humanity. These beings supposedly possessed four arms and eyes and were egg-laying hermaphrodites, sharing Lemuria with dinosaurs. The mythical Lemuria became part of popular culture…

Bibliography:

RAMASWAMY, S. (2004): The lost land of Lemuria - Fabulous geographies, catastrophic histories. University of California Press: 334

The views expressed are those of the author(s) and are not necessarily those of Scientific American.

ABOUT THE AUTHOR(S)

My name is David Bressan and I'm a freelance geologist working mainly in the Austroalpine crystalline rocks and the South Alpine Palaeozoic and Mesozoic cover-sediments in the Eastern Alps. I graduated with a project on Rock Glaciers dynamics and hydrology, this phase left a special interest for quaternary deposits and modern glacial environments. During my research on glaciers, studying old maps, photography and reports on the former extent of these features, I became interested in history, especially the development of geomorphologic and geological concepts by naturalists and geologists. Living in one of the key area for the history of geology, I combine field trips with the historic research done in these regions, accompanied by historic maps and depictions. I discuss broadly also general geological concepts, especially in glaciology, seismology, volcanology, palaeontology and the relationship of society and geology.

Mount Shasta Annotated Bibliography 

Chapter 16 
Legends: Lemuria 
https://www.siskiyous.edu/library/shasta/documents/AB_Ch16.pdf
The lowly primate, the lemur, was named after ancient Roman mythological ghosts called 'lemures.' According to the Oxford Classical Dictionary, 1970, there was a Roman festival called 'Lemuria.' But the modern name of 'Lemuria' was named for the mammal lemur. In the mid-19th Century paleontologists coined the term 'Lemuria' to describe a hypothetical continent, bridging the Indian Ocean, which would have explained the migration of lemurs from Madagascar to India. Lemuria was a continent which submerged and was no longer to be seen. By the late 19th Century occult theories had developed, mostly through the theosophists, that the people of this lost continent of Lemuria were highly advanced beings. The location of the folklore 'Lemuria' changed over time to include much of the Pacific Ocean. In the 1880s a Siskiyou County, California, resident named Frederick Spencer Oliver wrote A Dweller on Two Planets, or, the Dividing of the Way which described a secret city inside of Mt. Shasta, and in passing mentioned Lemuria. Edgar Lucian Larkin, a writer and astronomer, wrote in 1913 an article in which he reviewed the Oliver book. In 1925 a writer by the name of Selvius wrote "Descendants of Lemuria: A Description of an Ancient Cult in America" which was published in the Mystic Triangle, Aug., 1925 and which was entirely about the mystic Lemurian village at Mt. Shasta. Selvius reported that Larkin had seen the Lemurian village through a telescope. In 1931 Wishar Spenle Cervé published a widely read book entitled Lemuria: The Lost Continent of the Pacific in which the Selvius material appeared in a slightly elaborated fashion. The Lemurian–Mt. Shasta legend has developed into one of Mt. Shasta's most prominent legends. The entries in this section document the books and articles about Mt. Shasta and its Lemurians.

THE LOST LEMURIA
W. Scott-Elliot
1904
https://archive.org/details/in.ernet.dli.2015.222654/page/n9/mode/2up


NOTE
W. SCOTT-ELLIOT (d. 1930), banker, amateur anthropologist, and adherent of Theosophy, wrote two influential books of pseudoscience, The Story of Atlantis (1896) and The Lost Lemuria (1904) which attempted to explore the histories of the two titular lost continents in light of Helena Blavatsky's theories about root races and ancient history. These books were combined in 1925 as The Story of Atlantis and the Lost Lemuria, which H. P. Lovecraft read and used as an important influence on the development of the Cthulhu Mythos. This copy of The Lost Lemuria is reproduced from the 1904 edition and is included in my book, Theosophy on Ancient Astronauts

The History of Atlantis

by Lewis Spence

https://www.forgottenbooks.com/en/books/TheHistoryofAtlantis_10017582

Review


Lewis Spence, a prolific author and journalist, was one of the world's foremost researchers into the lost civilization of Atlantis. The History of Atlantis is one of five works the author wrote on the topic, and perhaps his most well-known. Spence's goal with this title was to offer a historical treatment of Atlantis, the mythical sunken land that's mere existence is still debated.

Over the course of sixteen chapters, Spence presents his evidence for the existence of Atlantis, as well as a supposed history and examination of daily life in the lost land. The author begins by outlining the historical sources on which he has relied. The most prominent source is the writing of Plato, the great Greek philosopher. After presenting his sources, Spence launches into his history of the continent. Subjects addressed include the people of Atlantis, the ruling Kings, the traditions of Atlantis, religion, animal life, and the Atlantean culture-complex, among other topics. Spence presents each discussion in great detail, painting a vivid picture of the now-submerged continent. There is no doubt that The History of Atlantis is a quality work.

Excerpt


Again, I have, I think, thrown much new light on the character of the Atlantean invasion of Europe, on the exact site of Atlantis, and especially on the great amount of evidence for the former existence of the island-continent which survives in British and Irish folklore and tradition. British tradition, indeed, is the touchstone of Atlantean history, and the identification of Lyonesse with Atlantis, and the grouping of Atlas with the British gods, Albion and Iberius, should go far to prove the ancient association of our islands with the sunken continent.



https://archive.org/details/lemuriawisharcerve/mode/2up




https://archive.org/details/TheMountainTopsOfLemuria/page/n33/mode/2up

Friday, October 27, 2023

ICYMI
Remains of 3,000-mile-wide ‘lost continent’ discovered on ocean floor, study says

2023/10/26

The splintered remnants of Argoland, a 155 million-year-old continent that once stretched as wide as the United States, were recently located throughout the Indian Ocean and Southeast Asia. - Dreamstime/Dreamstime/TNS

While Atlantis — a fabled continent said to have been swallowed by the sea — continues to elude its seekers, another long-lost and less famous land mass has been discovered at the bottom of the ocean.

The splintered remnants of Argoland, a 155 million-year-old continent that once stretched as wide as the United States, were recently located throughout the Indian Ocean and Southeast Asia.

“Finding Argoland proved challenging,” geologists wrote in a pre-print study posted Oct. 19 in the journal Gondwana Research.

“We spent seven years putting the puzzle together,” Eldert Advokaat, one of the study authors, said in a university news release.

Argoland is believed to have broken off from Australia during the late Jurassic period, when Brachiosauruses and Stegosauruses roamed the Earth. Over the millennia, it then drifted toward Southeast Asia before eventually disappearing.

Researchers have long suspected the continent once existed, as evidenced by a “void” or basin it left behind known as the Argo Abyssal Plain. But no remnants of such a land mass had ever been found.

“If continents can dive into the mantle and disappear entirely, without leaving a geological trace at the earth’s surface, then we wouldn’t have much of an idea of what the earth could have looked in the geological past,” Douwe van Hinsbergen, one of the study’s authors, said in the release.

But finally, the continent’s rocky crumbs have been spotted. Dutch geologists detected traces of the lost land mass in the form of tectonic “mega-units,” which are scattered on the ocean floor and embedded within small islands.

Parts of the continent, which once extended over 3,000 miles, were “hidden beneath the green jungles of large parts of Indonesia and Myanmar,” researchers said.

Using these remains, geologists were able to meticulously map out Argoland’s slow destruction, which they then recreated in a video.

It appears to have fractured into an archipelago during the Late Triassic period, parts of which later plunged into the sea, researchers said.

Other lost continents underwent similar processes, including Zealandia, a submerged mass near Australia, and Greater Adria, a continent once located in the Mediterranean Sea.

Piecing together the life and death of continents is “vital for our understanding of processes like the evolution of biodiversity and climate, or for finding raw materials,” van Hinsbergen said in the release. “And at a more fundamental level: for understanding how mountains are formed or for working out the driving forces behind plate tectonics.”

© The Charlotte Observer


Saturday, September 02, 2023

Lasers revealed 6 ancient civilizations that were hiding in plain sight

Paola Rosa-Aquino, Jenny McGrath
Fri, September 1, 2023 


Lidar captured the ruins of a civilization in the Brazilian Amazon.
Ecossistema Dakila

Archeologists beam lasers from the sky to unearth ancient settlements hiding in plain sight.


Lidar uses laser pulses to penetrate dense vegetation, revealing human-built structures underneath.


The laser technology is transforming archaeology by revealing the scope of ancient civilizations.

In recent years, archaeologists have turned to lasers in order to unearth previously hidden ancient civilizations.

A laser technology known as lidar — short for Light Detection and Ranging — beams tens of thousands of laser pulses per second from planes or helicopters at the ground below, penetrating through thick, deep forest canopy. That provides researchers with data to create three-dimensional maps by digitally removing the vegetation, revealing human-built structures underneath.

Researchers have found hundreds of structures in areas once thought too inhospitable for human habitation. The aerial views help them understand how far these cities and villages stretched, which archaeologists found difficult to map before lidar.

From a Maya city to complex villages deep in the Brazilian Amazon, here are six previously unknown civilizations that were discovered through state-of-the-art lidar technology.
Maya pyramidal structures in the Yucatán Peninsula

Lidar imagery shows a Maya settlement in a biological preserve on the Yucatán Peninsula.
Ivan Šprajc/National Institute for Anthropology and History (INAH)

About 40 miles inside the dense vegetation of the Balamkú ecological reserve on Mexico's Yucatán Peninsula, researchers found the remains of a Maya city.

Based on pottery archaeologists found at the site, Maya people probably inhabited the city between 600 and 800 CE and perhaps earlier. Over about 123 acres, the city center contained 50-foot pyramidal structures, plazas, stone columns, and altars, according to the 2023 study.

"Architecturally, it was truly massive," archaeologist Ivan Šprajc told the BBC. "So, it's clear this must have been a politically important center."

An estimated 6 to 8 million Maya people live throughout the Americas. Thus, the culture never disappeared, but Šprajc said such archaeological finds can help scientists understand what led to "a drastic demographic decline" by the 10th century.
A hidden 2,000-year-old Maya civilization in northern Guatemala


Researchers found a 2,000-year-old Mayan civilization in northern Guatemala using Lidar.
Hansen et al.

Using laser pulses, researchers detected a 2,000-year-old Maya civilization in the Mirador-Calakmul Karst Basin region of northern Guatemala with nearly 1,000 archaeological sites.

From their topographical maps of the area, they determined that the civilization consisted of more than 417 cities, towns, and villages spread across 650 square miles. They published their findings in 2022 in the journal Ancient Mesoamerica.

The settlement had dozens of ball courts and 110 combined miles of elevated limestone-and-clay causeways that allowed ancient Mayas to travel over wetlands and between different sites.

"They're the world's first superhighway system that we have," Richard Hansen, the study's lead author, told CNN.

Nearly 500 long-lost Maya and Olmec ceremonial sites in Mexico

Lidar uncovered almost 500 ceremonial sites in the Olmec and Maya regions of Mexico.Inomata et al.

In 2021, researchers published a study detailing how they had used lidar to uncover 478 Mesoamerican sites they estimated were between 2,000 and 3,000 years old.

The sites are spread across a 32,800-square-mile area in the Mexican states of Tabasco and Veracruz, where the Olmec and Maya civilizations flourished.

"It was unthinkable to study an area this large until a few years ago," Takeshi Inomata, an anthropologist with the University of Arizona who co-authored the study, said in a press release at the time.

The finding helps archeologists connect the two cultures. The dates of construction and similarity of certain structures suggest that an Olmec site, San Lorenzo, provided inspiration for some Maya monuments.
61,480 previously unknown structures hidden under the dense Guatemalan jungle

Lidar laser technology found ancient cities with more than 60,000 structures in Guatemala.
Luke Auld-Thomas/Marcello A. Canuto

In 2018, researchers explained how they used laser technology to map Petén, Guatemala, where Maya people once lived.

They discovered 61,480 long-lost roads, foundations for houses, military fortifications, and elevated causeways. They all date back to 650 and 800 CE, during the late Classic period.

The researchers estimate as many as 11 million people could have lived in the interconnected cities.

"Seen as a whole, terraces and irrigation channels, reservoirs, fortifications, and causeways reveal an astonishing amount of land modification done by the Maya over their entire landscape on a scale previously unimaginable," Francisco Estrada-Belli, an anthropologist at Tulane University and co-author of the study, said in a press release.
81 earthworks, including fortified villages and roads, deep in the Amazon rainforest

amazon mound
An aerial photo of an earthwork mound constructed over 500 years ago in the Amazon.
Courtesy of Jonas Gregorio de Souza/ University of Exeter

In Brazil's Mato Grasso region, archaeologists using lidar found evidence of 24 sites with 81 earthworks, which included interconnected roads and fortified villages built on mounds.

They believe the structures may have supported a complex civilization with up to 1 million people between the years 1250 and 1500 CE.

Some of the geoglyphs, as archaeologists call the sites carved into the Earth, were up to a quarter of a mile across.

Hundreds more sites may be hidden in the jungle in a "continuous string of settlements," Jonas Gregorio de Souza, the paper's lead author, told The Wall Street Journal in 2018.

"These people were combining small-scale agriculture with management of useful tree species," de Souza told The Washington Post. "So it was more a sustainable kind of land use" than current land-clearing practices.

A wide-ranging ancient civilization buried in the Bolivian Amazon


A Lidar image of an ancient Amazonian urban network in what is now Bolivia
H. Prümers/German Archeological Institute

In what is now Bolivia, lidar revealed the hidden ruins of 26 Indigenous settlement sites, 11 of which were new discoveries, that thrived in the Amazon rainforest more than 600 years ago.

"Our results put to rest arguments that western Amazonia was sparsely populated in pre-Hispanic times," researchers wrote in the journal Nature.

People from the Casarabe Culture created canals, stepped platform buildings, and 72-foot conical pyramids, which occupied an area of approximately 1,700 square miles between 500 and 1,400 CE. The lidar maps helped the researchers see how the spread-out settlements fit together.

Heiko Prümers, a co-author of the study, theorized that the Casarabe may have left the settlement due to lack of rainfall. "We know that there were severe droughts in the Amazon regions several times in history," he told Smithsonian Magazine in 2022. "That might have happened to this culture as well."

Monday, September 12, 2022

Scientists Want to Know If Earth Once Harbored a Pre-Human Industrial Civilization

Stav Dimitropoulos August 30, 2022

Photo credit: Mark Stevenson/Stocktrek Images - Getty Images
  • The Silurian hypothesis asks whether it might be possible to find evidence of a pre-human industrial civilization in Earth’s geologic record—even one that might have existed millions of years ago.

  • The astrobiologists who developed the thought experiment concluded that there is not strong evidence in Earth’s geologic record to support such a claim.

  • However, we still lack the scientific methods that would allow us to dive deep into Earth’s behaviors over such a long time span, so we may want to keep an open mind.

Complex life on our planet has existed for at least 400 million years. Yet as a species, we only managed to create an industrial civilization around 300 years ago. But, what if an earlier industrial civilization existed on Earth millions of years ago? If that were so, how would we be able to prove it—or disprove it? This is the crux of the Silurian hypothesis, a fascinating thought experiment that appeared in a study published in 2018 in the International Journal of Astrobiology.

The possibility of life elsewhere in the universe and its parallels with the Anthropocenethe current geological epoch, during which humans have impacted Earth to the point of no return—has long puzzled Adam Frank, a professor of astrophysics at the University of Rochester, New York, and one of the two authors of the study.

“Is it common for any civilization that reaches our level of energy use to trigger their own version of climate change? I was wondering. If there are alien civilizations, would they also trigger climate change?” Frank ponders. With this whirlwind of thoughts in mind, Frank visited the NASA Goddard Institute of Space Sciences (GISS), an elite climate-science facility at the University of Columbia, New York. He wanted to share his thoughts with climate researchers, and surely expected lots of raised eyebrows and skeptical stares in the process.

“I went into the meeting with Gavin A. Schmidt [a climatologist and the director of NASA GISS], and started talking about aliens. And then Gavin stopped me and said, ‘Wait a second. How do you know we’re the only time there’s been a civilization on our own planet?’’’Frank tells Popular Mechanics. The question was an “Aha!” moment for Frank, mostly because it allowed him to consider revisiting facts he had taken for granted.

Evidence in Earth’s Geologic Record

Photo credit: United States Geological Survey, Public domain, via Wikimedia Commons

Homo sapiens first appeared on Earth about 300,000 years ago. In the unlikely case that such an old industrial civilization had existed, it would predate the species to which we all belong. It was then that Schmidt called the idea the Silurian hypothesis, paying homage to the sophisticated reptilian humanoids awoken by nuclear testing after 400 million years of hibernation in a 1970s episode of the British science fiction television series Doctor Who. The study authors decided to laser in on the time period from four million years ago to 400 million years ago.

Going back hundreds of millions of years to find traces of a potential pre-Homo Sapiens civilization is not a piece of cake. “After a few million years, Earth is pretty much resurfaced. You’re not going to have any statues, buildings, or anything left,” Frank says. Fossil records will be virtually nonexistent as everything will have crumbled to dust. The only evidence would come in the form of chemical imprints. “You’d have to look at each layer of rock, and then try and detect trends—look for changes in things like the carbon or oxygen isotopes, which are tracers of things like carbon dioxide. An industrial civilization would dump lots of carbon dioxide into the atmosphere, just like we do,” Frank says. Plastic or nanoparticles would also be good indicators of an industrial civilization that occurred in time immemorial.

Schmidt and Frank were intrigued by the period of geological history known as the Paleocene-Eocene Thermal Maximum (PETM), because something peculiar happened on our planet during it, 56 million years ago: Earth’s average temperature soared to 15 degrees Fahrenheit above what we have today, and the world became a temperate and iceless place. They investigated the carbon and oxygen isotope ratios from the PETM and indeed saw spikes, but they also saw declines, and all of these over a few hundred thousand years, which is nowhere near the speed at which carbon is currently suffocating the atmosphere. Frank says the PETM’s chemical differences pointed to a long-term climate change.

They also reviewed other “abrupt events” throughout time that are visible in the geologic record, including ocean anoxic events—when an ocean becomes depleted of oxygen—and extinction events. Unsurprisingly, and perhaps slightly disappointingly, they were not indicative of an industrial civilization, either.

Applying Occam’s Razor

“The hypothesis that Earth may have harbored long-extinct industrial civilizations and that existence may be recorded in the geologic record associated with climate change signatures is fascinating, however, even the authors are not sold on the likelihood of it being true,” Stephen Holler, an associate professor of physics at Fordham University in New York City, tells Popular Mechanics.

A great rule of thumb exists in science, and it goes by the name Occam’s razor. In the 14th century, English Franciscan philosopher and theologian William of Ockham proposed that the likeliest solution to a problem is the simplest one. “That is very likely the case here,” says Holler. “We can largely explain the geologic record in terms of natural phenomena, so there is no need to invoke lost civilizations.”

However, if an earlier industrial civilization did exist, and its extinction was the result of catastrophic climate change due to industrial activities, then we should heed the warnings because, as a civilization, we stand at the precipice. “It will be a hard landing when we go over the edge, and we very well might not survive,” says Holler.

Greater Sustainability Leads to Fewer Signs

There is an oxymoron to the Silurian hypothesis: the more sustainable a society is in the way it generates energy and manufactures resources—arguably, the more advanced a society is—the smaller the footprint it will leave on the planet. Yet, this smaller footprint would translate to few markers on the geologic record for that period. For example, the more plastic or persistent synthetic molecules we produce, the higher the chances future civilizations will find traces of us. (Our society produces 300 million tons of plastic each year worldwide—almost the equivalent of the weight of the entire human population!). Even if we wipe ourselves off the face of Earth with a nuclear catastrophe, long-lived radioactive particles will endure in the soil eons later, signaling we had existed.

“With the Silurian hypothesis, we articulated the kinds of signals that our civilization would leave if we disappear and somebody looks for our civilization 10 or 20 millions of years from now,” Frank says.

But most of all, the experiment demonstrated certain shortcomings in our current scientific apparatus. “In case an earlier species’s industrial activity was particularly short-lived, we would not be able to detect it in ancient sediments with the tools and methods we have now,” Frank explains. “If you want to look for evidence of a previous civilization, you’d have to do studies that nobody’s done and develop novel methods—for example, you’d have to figure out ways to look at the rock record on a much finer timescale.”

Remember, we are talking about millions of years of evolution of complex life and an unsparing Earth that grinds down everything in its wake. And though both Frank and Schmidt don’t really believe an industrial civilization existed before our own, the main takeaway of the Silurian hypothesis, Frank says, is that if you’re not explicitly looking for something, you might not even see it.

Tuesday, October 24, 2023

Argoland: Unraveling the mysteries of a lost continent


10-23-2023
ByChrissy Sexton
Earth.com staff writer

Geologists have long been intrigued by a missing piece of Earth’s history – a lost continent called Argoland. Around 155 million years ago, a 5,000-kilometer chunk broke off of western Australia and began its solitary drift.

The void that was left behind is marked by a basin deep below the ocean known as the Argo Abyssal Plain. But, where did Argoland actually go?

A new study from Utrecht University reveals that while Argoland might not exist as a singular mass today, it has not vanished entirely.
The journey of Argoland

Scientists have relied on the underwater Argo Abyssal Plain as evidence of Argoland’s past existence. The seabed structure suggests that the detached continent drifted northwestward, potentially towards present-day Southeast Asia.

But the mystery deepens, as the vast continent-sized footprint of Argoland is conspicuously absent beneath Southeast Asian islands. Instead, these islands sit atop smaller continental fragments, encircled by significantly older oceanic basins.

This led geologists to dive deeper into the fate of Argoland. They found that the lost continent hasn’t completely disappeared – it has simply shattered into fragments.
Earth’s hidden tales

Earth’s crust varies in weight, comprising heavier oceanic sections and lighter continental chunks. Interestingly, these lighter portions might be lurking below sea level, much like Greater Adria, another lost continent.

Greater Adria’s journey ended when it submerged into the Earth’s mantle, leaving its top layer behind, which later morphed into the mountains of Southern Europe. Argoland, by contrast, left no evidence in the form of folded rocks.
Study significance

Utrecht University geologist Douwe van Hinsbergen emphasized the significance of tracing these continents.

“If continents can dive into the mantle and disappear entirely, without leaving a geological trace at the Earth’s surface, then we wouldn’t have much of an idea of what the Earth could have looked in the geological past. It would be almost impossible to create reliable reconstructions of former supercontinents and the Earth’s geography in foregone eras,” said van Hinsbergen.

“Those reconstructions are vital for our understanding of processes like the evolution of biodiversity and climate, or for finding raw materials. And at a more fundamental level: for understanding how mountains are formed or for working out the driving forces behind plate tectonics; two phenomena that are closely related.”
Islands of information

Van Hinsbergen and his colleague Eldert Advokaat were curious about what the geology of Southeast Asia may reveal about Argoland.

“But we were literally dealing with islands of information, which is why our research took so long. We spent seven years putting the puzzle together,” said Advokaat.

“The situation in Southeast Asia is very different from places like Africa and South America, where a continent broke neatly into two pieces. Argoland splintered into many different shards. That obstructed our view of the continent’s journey.”

Fragmented continent

But then, Advokaat realized that these fragments converged at their current locations simultaneously, painting a once cohesive picture. Today, the remnants of Argoland can be found beneath the jungles of Indonesia and Myanmar.

This fragmentation was characteristic. Argoland was never a single, solid landmass. Instead, it was an ‘Argopelago,’ a collection of microcontinental chunks interspersed with older oceanic basins. This aspect aligns with other known entities like Greater Adria and Zeelandia.

An evolving planet

The investigation by Advokaat and Van Hinsbergen seamlessly links the geological systems between the Himalayas and the Philippines. Their explorations unravel why Argoland fragmented so intensely.

Around 215 million years ago, the continent underwent rapid fracturing, breaking into slender splinters. This theory was further supported through field studies on islands such as Sumatra, Borneo, and Timor.

The story of Argoland is not one of complete disappearance but of transformation. As the world continues to evolve, this lost continent serves as a compelling reminder of the ever-shifting nature of our planet.

The study is published in the journal Gondwana Research.


GONDWANA’S SECRET: 390-MILLION-YEAR-OLD MARINE MYSTERY UNRAVELED

2023-10-23 02:24 PM by Daisy Hips



During the Early-Middle Devonian, Gondwana was a warm, flooded landmass at the South Pole, home to the now-extinct Malvinoxhosan biota. New research has revealed these species’ decline correlated with sea-level and temperature changes. Their extinction, likely due to disrupted ocean barriers and an influx of warm-water species, led to an irreversible collapse of polar ecosystems. Similar patterns have been observed in South America, underscoring the lasting sensitivity of polar regions to environmental shifts.

During the Early-Middle Devonian period, a large landmass called Gondwana—which included parts of today’s Africa, South America, and Antarctica—was located near the South Pole. Contrary to the frosty environment we see today, the climate was warmer, and elevated sea levels submerged much of its terrain.

THE MALVINOXHOSAN BIOTA MYSTERY


The Malvinoxhosan biota were a group of marine animals that thrived in cooler waters. They included various types of shellfish, many of which are now extinct. “The origin and disappearance of these animals have remained an enigma for nearly two centuries until now,” says Dr. Penn-Clarke.

The researchers collected and analyzed a vast amount of fossil data. They used advanced data analysis techniques to sort through layers of ancient rock based on the types of fossils found in them. Imagine it like sorting through layers of a cake, each with different ingredients.

Simplified diagram showing the relationship between changes in sea-level and environment with biodiversity through time in South Africa during the Early-Middle Devonian. Credit: GENUS: DSI-NRF Centre of Excellence in Palaeosciences

They then identified at least 7 to 8 distinct layers, each showing fewer and fewer types of marine animals over time. These findings were then compared with how the environment and sea levels have changed, as well as with global temperature records from that ancient period. They found that these marine animals went through several phases of declining numbers of different species, which correlated with changes in sea levels and climate. It was a difficult process.

“This research is around 12-15 years in the making, and it wasn’t an easy journey,” shares Dr. Penn-Clarke. “I was only able to overcome all the different challenges through dogged persistence and perseverance.”

THEORIES ON MARINE LIFE ADAPTATION


Their research suggests that the Malvinoxhosan biota survived during a long period of global cooling. Dr. Penn-Clarke elaborates, “We think that cooler conditions allowed for the creation of circumpolar thermal barriers—essentially, ocean currents near the poles—that isolated these animals and led to their specialization.”

As the climate warmed up again, these animals disappeared. They were replaced by more generalist marine species that are well-adapted to warmer waters. Shifts in sea levels during the Early-Middle Devonian period probably disrupted natural ocean barriers that had kept waters cooler at the South Pole.

Inset images are of common invertebrate fossils found in South Africa. Clockwise from left: Brachiopod shell bed of Australospirifer and Australocoelia, the trilobite Eldredgeia, brachiopod shells of Rhipidothyris, an ophiuroid bed. At centre is an enrolled trilobite assigned to Burmiesteria. Image credits: Geographic reconstruction after Penn-Clarke and Harper (2023), fossil photographs by Cameron Penn-Clarke and John Almond. Credit: GENUS: DSI-NRF Centre of Excellence in Palaeosciences

This allowed warmer waters from regions closer to the equator to flow in, setting the stage for marine animals that thrive in warmer conditions to move into these areas. As a result, these warm-water species gradually took over, leading to the decline and eventual disappearance of the specialized, cool-water Malvinoxhosan marine animals.

IMPACT ON POLAR ECOSYSTEMS

The extinction of the Malvinoxhosan biota led to a complete collapse in polar ecosystems, as biodiversity in these regions never recovered.

“This suggests a complete collapse in the functioning of polar environments and ecosystems to the point that they could never recover,” Dr. Penn-Clarke adds.

He likens this research to playing a game of Clue.

“It’s a 390-million-year-old murder mystery. We now know that the combined effects of changes in sea level and temperature were the most likely ‘smoking gun’ behind this extinction event,” he notes. It is still unknown if this extinction event can be correlated with known extinction events at the same time elsewhere during the Early-Middle Devonian as researchers simply do not have any real good age inferences. The mystery deepens further, and it is far from over.

Interestingly, similar declines in biodiversity controlled by sea-level changes have been observed in South America. This points to a broader pattern of environmental change affecting the South Polar region during this period and underscores the vulnerability of polar ecosystems, even in the past.

“This research is important when we consider the biodiversity crisis we are facing in the present day,” says Dr. Penn-Clarke. “It demonstrates the sensitivity of polar environments and ecosystems to changes in sea level and temperature. Any changes that occur are, unfortunately, permanent.”

Reference: “The rise and fall of the Malvinoxhosan (Malvinokaffric) bioregion in South Africa: Evidence for Early-Middle Devonian biocrises at the South Pole” by Cameron R. Penn-Clarke and David A.T. Harper, 13 October 2023, Earth-Science Reviews.
DOI: 10.1016/j.earscirev.2023.104595

The study was funded by the GENUS: DSI-NRF Centre of Excellence in Palaeosciences, the National Research Foundation, and the Leverhulme Trust.