Sunday, August 10, 2025

Armenia, Azerbaijan sign US-brokered peace deal, agree to open ‘Trump Route’ transit corridor

Armenia, Azerbaijan sign US-brokered peace deal, agree to open ‘Trump Route’ transit corridor
Azerbaijan's President Ilham Aliyev, US President Donald Trump and Armenian Prime Minister Nikol Pashinyan hold up copies of the historic peace deal signed in the White House on August 8. / primeminister.am
By Clare Nuttall in Glasgow August 9, 2025

The leaders of Armenia and Azerbaijan signed a landmark peace agreement at the White House on August 8. Officials said the US-brokered deal will end decades of conflict and open a strategic transit corridor that is set to reshape trade flows in the South Caucasus.

The agreement, reached after months of US-led talks, commits the two countries to formally end hostilities and reopen transport links severed during decades of conflict over the disputed Nagorno-Karabakh region. It includes the creation of a major transit route through southern Armenia linking Azerbaijan to its Nakhchivan exclave bordering Turkey, a project named the “Trump Route for International Peace and Prosperity” (TRIPP).

“This is a great honour for me,” US President Donald Trump said at the signing ceremony, flanked by Azerbaijani President Ilham Aliyev and Armenian Prime Minister Nikol Pashinyan. “I didn’t ask for this,” he added, according to a White House statement, saying that the name of the route was proposed by the Armenian side.

Aliyev and Pashinyan shook hands in the White House’s East Room as Trump reached over to clasp both their hands, in a symbolic gesture intended to draw a line under the lengthy conflict that has claimed tens of thousands of lives since the early 1990s.

“For more than 35 years, Armenia and Azerbaijan have fought a bitter conflict that resulted in tremendous suffering for both nations… With this accord, we’ve finally succeeded in making peace,” Trump said.

The leaders of both Azerbaijan and Armenia were effusive in their thanks to the US president. 

“It’s a day which will be remembered by the people of Azerbaijan with a feeling of pride and gratitude to President Trump… Within several months, he managed to put an end to conflicts in Asia, in Africa, and now in South Caucasus — what we could not achieve for more than 30 years,” said Aliyev, as quoted in a White House statement.

“We will turn the page of standoff, confrontation, and bloodshed, and provide a bright and safe future for our children.” 

“Today, we have reached a significant milestone in Armenia-Azerbaijan relations,” said Pashinyan, according to the Armenian Prime Minister’s Office. “We are laying the groundwork for a better history than the one we have had in the past. This groundbreaking progress simply would not have been possible without President Trump's personal involvement and his unwavering commitment to peace in our region.” 

Alongside the peace declaration, both Yerevan and Baku signed separate agreements with Washington to deepen cooperation in energy, technology, and trade, though the White House did not immediately disclose details.

According to the joint declaration, the TRIPP project will guarantee “unhindered connectivity” between Azerbaijan and Nakhchivan, while providing “mutual benefits for the Republic of Armenia in terms of international and domestic connectivity”. There must now be an excellent prospect of Azerbaijan's close ally Turkey fully reopening its border to Armenia.

The agreement comes almost two years after Azerbaijan retook full control of Nagorno-Karabakh in a 2023 offensive that prompted the exodus of more than 100,000 ethnic Armenians from the enclave.

Azerbaijan's long-standing demand for a land corridor to Nakhchivan – known in Baku as the Zangezur corridor – had been a key sticking point in talks. Armenia had resisted the proposal, citing sovereignty concerns.

The TRIPP is essentially the same route, but US officials said the initiative would be implemented in coordination with Armenia and “mutually agreed third parties”.

The TRIPP corridor is expected to boost trade along the “Middle Corridor” route linking China and Europe via Central Asia, the Caspian Sea, and Turkey, offering an alternative to Russian and Iranian transit networks.

Both Azerbaijan and Turkey are expected to benefit from faster cargo routes, while Armenia could gain new economic opportunities from participation in a major international transit system.

However, it is expected to erode Iran and Russia’s influence in the region. The new route and increased US engagement in the region face strong opposition from Iran. Tehran has repeatedly warned against any new transit arrangements that could marginalise it from regional trade flows.

Russia, historically a security guarantor in the South Caucasus, has seen its role diminish amid strained relations with both Yerevan and Baku. Armenia has moved closer to the European Union after the Russia-led CSTO security alliance failed to intervene during Azerbaijani incursions, while Azerbaijan’s ties with Moscow have been tested by recent diplomatic incidents.

Russia Cautious on Armenia-Azerbaijan Deal, Iran Rejects Border Corridor

Moscow, once the main power broker in the Caucasus, is now bogged down in its offensive in Ukraine, diverting political and military resources into the grinding conflict of attrition.

by AFP | Aug. 10, 2025


US President Donald Trump meets with President Ilham Aliyev of Azerbaijan and Prime Minister Nikol Pashinyan of Armenia, Friday, Aug. 8, 2025, in the Cabinet Room. (Official White House Photo by Daniel Torok)

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Russia cautiously welcomed a US-brokered draft deal between Armenia and Azerbaijan on Saturday, but Moscow’s regional ally Iran rejected the idea of a new border corridor backed by President Donald Trump.

The two former Soviet republics signed a peace deal in Washington on Friday to end a decades-long conflict, though the fine print and binding nature of the deal remained unclear.

The US-brokered agreement includes establishing a transit corridor through Armenia to connect Azerbaijan to its exclave of Nakhchivan, a longstanding demand of Baku.


The United States would have development rights for the corridor – dubbed the “Trump Route for International Peace and Prosperity” – in the strategic and resource-rich region


But Russia’s ally and the warring parties’ southern neighbour Tehran said it would not allow the creation of such a corridor running along the Iranian border.

“With the implementation of this plot, the security of the South Caucasus will be endangered,” Akbar Velayati, an advisor to supreme leader Ayatollah Ali Khamenei told the Tasnim news agency.

The planned corridor was “an impossible notion and will not happen,” while the area would become “a graveyard for Trump’s mercenaries,” he added.

In a similar tone, Moscow said it would “further analyze” the corridor clause, noting there were trilateral agreements in place between Russia, Armenia and Azerbaijan, from which no one had yet withdrawn.

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“It should not be ignored that Armenia’s border with Iran is guarded by Russian border guards,” said Russian foreign ministry spokeswoman Maria Zakharova.

Moscow, previously a key backer of Armenia, still has a military base there. Embroiled in its Ukraine operation, launched in 2022, it did not intervene in the latest conflict.

This has strained the historically warm ties between Yerevan and Moscow, home to a large and influential Armenian diaspora, triggering Armenia’s drift towards the West.
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Waning influence

Christian-majority Armenia and Muslim-majority Azerbaijan went to war twice over their border and the status of ethnic enclaves within each other’s territories.

Moscow, once the main power broker in the Caucasus, is now bogged down in its more than three-year offensive in Ukraine, diverting political and military resources into the grinding conflict of attrition.

Both Armenia and Azerbaijan praised the US efforts in settling the conflict. Azerbaijani President Ilham Aliyev even said he would back President Donald Trump’s nomination for the Nobel Peace Prize.

The US-led NATO alliance welcomed the deal as a “significant step forward.”

But in Moscow, Zakharova refrained from even calling it a deal, referring to it merely as “the meeting of the leaders of the South Caucasus republics in Washington” – adding, however, that it still deserved “a positive assessment.”
Repackaging for Trump?

Analysts also sounded a note of caution, with the International Crisis Group pointing out that the deal left “a lot of questions unanswered.”
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The two countries went to war twice over the disputed Karabakh region, which Azerbaijan recaptured from Armenian forces in a lightning 2023 offensive, sparking the exodus of more than 100,000 ethnic Armenians.

Azerbaijan and Armenia agreed on the text of a comprehensive peace deal in March.

Much of the White House agreement was a “repackaging” of that, which helped both countries get on Trump’s good side “by giving him a role,” the Crisis Group’s senior South Caucasus analyst Joshua Kucera said.

Azerbaijan later added a host of demands to that March deal, including amendments to Armenia’s constitution to drop territorial claims for Karabakh, before signing the document.

Pashinyan has announced plans for a constitutional referendum in 2027, but the issue remains deeply divisive among Armenians, with Kucera warning that this could yet derail the process.

Kucera called the corridor “one potentially significant development” from the White House meeting, but added that missing key details could prove “serious stumbling blocks.”

The US-brokered deal was “definitely a testament to the fact that Russia has been losing its influence” as its Ukraine operation had “diverted its attention and resources from some other areas of its traditional interest,” Olesya Vardanyan, an independent analyst on the South Caucasus, told AFP.

Unimaginable peace: Azerbaijan and Armenia sign historic agreement after decades of conflict


Copyright AP Photo

By Sasha Vakulina
 09/08/2025 - 

After almost four decades of a bloody conflict that until recently had no end in sight, Azerbaijan and Armenia signed a peace agreement in the presence of the US President Donald Trump. Notably absent in this historic moment is Russia, which no longer plays a central role in the South Caucasus.

Leaders of Armenia and Azerbaijan Nikol Pashinyan and Ilham Aliyev signed a peace agreement on Friday in the presence of US President Donald Trump in Washington, after almost four decades of a bloody Karabakh conflict.

“We are today establishing peace in the South Caucasus,” Azerbaijan's President Aliyev said. "Today we writing a great new history."

Armenian Premier Pashinyan added that this agreement represented "opening a chapter of peace". "(We are) laying foundations to a better story that the one we had in the past," he added.

"The countries of Armenia and Azerbaijan are committing to ending all fighting forever," Trump said at a joint press conference with the two leaders.

"They suffered greatly for so many years, many tried to find resolution, the European Union, the Russians, never happened," he added. "But with this accord we finally succeeded making peace."

In September 2023, Azerbaijan reclaimed full control of the Karabakh region after a lightning military campaign, and over the past year, Baku and Yerevan have been making progress in normalising their relations.

Although the Friday’s signing ceremony included not only Pashinyan and Aliyev, but also Trump, the former adversaries managed to mend fences only when there was no third party involved any more, including Washington and Moscow. But unlike Russia, the US will benefit from the peace agreement.

Meanwhile, the EU said it welcomed the deal and called the signing a "way to lasting, sustainable peace for both countries and across the entire region, also culminating years of EU efforts."

The EU also called for the" implementation of the agreed steps" to ensure steady and smooth progress towards full normalisation of relations between Azerbaijan and Armenia.

'Trump route' in South Caucasus


Armenia and Azerbaijan agreed to create a major transit corridor that will be named the Trump Route for International Peace and Prosperity.


It will connect mainland Azerbaijan and its Nakhchivan region, which borders Baku's ally Turkey via Armenian territory.

White House spokeswoman Anna Kelly said the new transit corridor will “allow unimpeded connectivity between the two countries while respecting Armenia's sovereignty and territorial integrity and its people.”

Azerbaijan and Nakhchivan are separated by a 32-kilometre patch of Armenia’s territory.

For Baku, the corridor offers a direct land connection to Nakhchivan, strengthens ties with Turkey and consolidates post-war gains through infrastructure diplomacy.

It also strengthens Azerbaijan’s position as a crucial transport and logistics hub on a global scale. Initially, Azerbaijan did not want to have any third party involved and preferred to have it under Baku’s control, without the US, Europe or Russia's involvement.

For Yerevan the transport route provides an opportunity to further integrate into wider trade networks, diversify its battered economy and attract foreign investment. Geopolitically, it would also help Armenia normalise relations with its neighbours.

Yerevan was concerned it could threaten Armenian sovereignty and wanted it to remain under Armenian control.

The new Trump route will be operated according to Armenian law, and the US will sublease the land to a consortium for infrastructure and management, the officials said.

Trump previewed much of Friday’s plan in a social media post Thursday evening, saying the two leaders would sign economic agreements with the US that would “fully unlock the potential of the South Caucasus region.”

“Many leaders have tried to end the war, with no success, until now, thanks to Trump,” the US president said on his Truth Social site.

Former allies

Armenia and Azerbaijan have also signed a document on dissolving the OSCE's Minsk Group.

“If we are closing the page on the conflict, then why do we need a format that deals with its settlement," Pashinyan said earlier this week.

Established in 1992, the OSCE Minsk Group was meant to facilitate the resolution of the Karabakh conflict, and it has been chaired by France, the US and Russia.

Its dissolution not only marks the end of the Karabakh conflict, but also formalises Baku and Yerevan distancing themselves from Moscow, especially given the fact that the two leaders have jointly made the formal request in Washington.

Signing the peace agreement in Washington alongside the US president sends a strong signal to Moscow regarding the two countries' commitment to finding a solution among themselves, but also redirects their foreign policy focus to the West.

Moscow has been trying to repair the cooperation with both Baku and Yerevan, offering "mediation" and launching disinformation campaigns against Yerevan.

In recent days, Russia-state-controlled media have issued massive criticism and numerous attacks on Pashinyan, accusing him of “trading” Armenian sovereignty for personal financial gains and even calling him a “puppet”.

Earlier Moscow had also launched disinformation campaigns against Yerevan with false allegations of “a bio weapons facility in Armenia orchestrated by the Americans”.

Moscow had repeatedly made similar claims about US bio-weapons facilities in Ukraine before the full-scale invasion. Russia has also made similar false claims about Georgia in the past.

Russia’s attempts to repair its ties with Baku were entirely destroyed when an Azerbaijani airliner crashed in Kazakhstan in December, killing 38 of 67 people aboard.

As exclusively reported by Euronews, investigations into the incident revealed that the Azerbaijan Airlines Flight 8243 was shot at by Russian air defence over Russia's Grozny and rendered uncontrollable by electronic warfare.

Azerbaijan's Aliyev recently announced that his country is preparing to file lawsuits in international courts against Russia regarding the Azerbaijan Airlines plane crash.

Referring to the investigation into the Malaysian airline Boeing case, shot down by Russian militants over the Russia-occupied Donetsk region of Ukraine, Aliyev said Baku is ready to wait as long as it takes.

“We are ready to wait 10 years, but justice must win. And unfortunately, the situation, which is currently in limbo, does not contribute to the development of bilateral relations between Russia and Azerbaijan," he explained.

Last month, Azerbaijan and Russia engaged in another rare escalation. Baku detained the executive director and editor-in-chief of Russia's state-run news agency Sputnik following Moscow’s raids of the Azeri community in Yekaterinburg.

Two people died during the raid by the Russian Federal Security Service (FSB), and 50 more were detained.

Armenians Caught Between Hope and Distrust After Accord with Azerbaijan

The leaders of Armenia and Azerbaijan met Friday and signed a peace treaty under the watch of US President Donald Trump.


by AFP | Aug. 10, 2025

US President Donald Trump (C), Azerbaijani President Ilham Aliyev (L) and Armenian Prime Minister Nikol Pashinyan display the agreement they signed in the State Dining Room of the White House in Washington, DC on August 8, 2025. ANDREW CABALLERO-REYNOLDS / AFP

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‘Acceptable’
‘Endless concessions’
‘More stability... in the short term’

The streets were almost deserted in Yerevan Saturday because of the summer heat, but at shaded parks and fountains, Armenians struggled to make sense of what the accord signed a day earlier in Washington means for them.

The leaders of Armenia and Azerbaijan, two Caucasian countries embroiled in a territorial conflict since the fall of the USSR, met Friday and signed a peace treaty under the watch of US President Donald Trump.

In Yerevan, however, few of the people asked by AFP were enthusiastic.

‘Acceptable’

“It’s a good thing that this document was signed because Armenia has no other choice,” said Asatur Srapyan, an 81-year-old retiree.

He believes Armenia hasn’t achieved much with this draft agreement, but it’s a step in the right direction.

“We are very few in number, we don’t have a powerful army, we don’t have a powerful ally behind us, unlike Azerbaijan,” he said. “This accord is a good opportunity for peace.”

Maro Huneyan, a 31-year-old aspiring diplomat, also considers the pact “acceptable,” provided it does not contradict her country’s constitution.

“If Azerbaijan respects all the agreements, it’s very important for us. But I’m not sure it will keep its promises and respect the points of the agreement,” she added.
‘Endless concessions’

But Anahit Eylasyan, 69, opposes the agreement and, more specifically, the plan to create a transit zone crossing Armenia to connect the Nakhchivan region to the rest of Azerbaijan.



At least six European journalists have been expelled or denied re-entry into Georgia recent months, sparking fears of a Russian-style crackdown on press freedoms.

“We are effectively losing control of our territory. It’s as if, in my own apartment, I had to ask a stranger if I could go from one room to another,” she explains.

She also hopes not to see Russia, an ally of Armenia despite recent tensions, expelled from the region.”

Anahit also criticizes Prime Minister Nikol Pashinyan for “making decisions for everyone” and for his “endless concessions to Azerbaijan.”

“We got nothing in exchange, not our prisoners, nor our occupied lands, nothing. It’s just a piece of paper to us,” she fumes.

Shavarsh Hovhannisyan, a 68-year-old construction engineer, agrees, saying the agreement “is just an administrative formality that brings nothing to Armenia.”

“We can’t trust Azerbaijan,” Hovhannisyan asserted, while accusing Pashinyan of having “turned his back” on Russia and Iran.

“It’s more of a surrender document than a peace treaty, while Trump only thinks about his image, the Nobel Prize.”
‘More stability... in the short term’

According to President Trump, Armenia and Azerbaijan have committed “to stop all fighting forever; open up commerce, travel and diplomatic relations; and respect each other’s sovereignty and territorial integrity.”

For Olesya Vartanyan, an independent researcher specializing in the Caucasus, the Washington agreement “certainly brings greater stability and more guarantees for the months, if not years, to come.”

But given the long-lasting tensions between Armenia and Azerbaijan, “I fear that we will have to plan only for the very short term,” she said.

World welcomes Armenia-Azerbaijan move towards peace, after “larger than life” White House meeting



The meeting of president Ilham Aliyev of Azerbaijan, and prime minister Nikol Pashinyan of Armenia in the White House on 8 August 2025 has been described many times as being “historic”, and in many ways it was. However the presence and active participation of the president of the United States made it “special”.

However, Donald Trump managed to make the event “larger than life”. Trump was on his best behaviour. He was relaxed and happy. He piled profuse compliments on his two guests, and they replied in kind, indulging in flattery that at times was embarrassing. But you can excuse them. Never have two foreign leaders been so warmly welcomed in the White House.

The substance was thin: the peace agreement between Armenia and Azerbaijan was initialed but not signed; much of what was included in the Joint Declaration was aspirational, requiring further negotiations. But the symbolism and imagery was powerful. And in this case, it mattered.

The world has scrambled to welcome the Armenia-Azerbaijan meeting in Washington. The European Union was first: Commission president Ursula von der Leyden and Council president, Antonio Costa, issued a statement within minutes. Various other EU personalities followed on Saturday. There was an important statement by Turkey, followed by UK, Netherlands, Georgia, Saudi Arabia, Poland, UAE, France, Israel, the Central Asian countries and others. Statements were also issued by the UN, NATO, OSCE, Council of Europe, NATO PA and others.

The reaction from Russia came late on Saturday and was muffled. It was left to Russian Foreign Ministry spokesperson Maria Zakharova to say

"It should be remembered that the current stage of normalization of Armenian-Azerbaijani relations began with the direct support and central role of Russia, with the adoption of a trilateral statement at the highest level on November 9, 2020, on a ceasefire and all military operations in the Nagorno-Karabakh conflict zone. A Russian peacekeeping contingent has been deployed in the region, which has made an irreplaceable contribution to stabilizing the situation. We will always remember our peacekeepers who died in the performance of their duties," the diplomat emphasized.

Reconciliation between Azerbaijan and Armenia should be integrated into the regional context and based on a balance of interests, said Zakharova. She noted that the meeting of the leaders of Armenia and Azerbaijan held in Washington with the mediation of the United States deserves a positive assessment. The involvement of regional players in the search for solutions in the South Caucasus should not create new dividing lines, Zakharova emphasized.

The Russian Federation will further analyze Washington's statements on the unblocking of regional communications in the South Caucasus. Trilateral agreements with the participation of the Russian Federation in the field of unblocking of communications in the South Caucasus remain relevant, Zakharova noted.

The emperor is naked. Russia is loosing the South Caucasus and Zakharova is clutching to straws in an attempt to hide facts.

Domestic reaction is subdued

Reaction in Azerbaijan, and particularly in Armenia, has been subdued.

The president of the influential APRI Centre in Yerevan, Lara Setrakian, said, “Once the peace agreement is implemented it will turn Armenia firmly toward the West. It will also likely mean a reorientation of regional power dynamics, giving the United States strategic influence in Russia’s neighborhood and a foothold on the doorstep of Iran. The US wins big, with technology, critical minerals, and energy deals ahead. ”

But in the end the world reaction matters. And for the moment Aliyev and Pashinyan bask in it.

Source: commonspace.eu



 

Athlete mental health support from coaches “under explored” in research amidst deselection concerns



Review of 104 studies shows little research focused on athletes’ access to mental health support or semi-formal sources such as coaches




University of Birmingham



A paper published in BMJ Open today (Friday 8 August) led by researchers from the University of Birmingham highlights how few studies conducted into athlete help-seeking for mental health have looked into support provided by semi-formal sources such as coaches, with the majority of research conducted on formal sources.

The team reviewed 104 relevant studies conducted around the world and found that while many athletes experience mental health issues, they face unique sport-specific barriers when seeking help and guidance. The review mapped the research on athletes’ views on access to support, their attitudes toward seeking it, and their past experiences from formal and semi-formal sources of support.

Kirsty Brown, PhD student, from the University of Birmingham and lead researcher said:

“We know that athletes’ face specific barriers to seek help for mental health. By mapping the research on athletes’ views on access, attitudes and experiences of support, this research uncovers more about the process of help-seeking in athletes, and where further research is required.”  

“Our new research highlights that while there is a growing academic understanding of how sports people experience mental health support, there are still unexplored areas in the research that leaves many questions unanswered about how athletes’ utilize formal and semi-formal sources of support. It is essential that these support networks understand the unique needs of athletes and are equipped to provide mental health support and signposting.”

Formal or semi-formal support?

Athletes may rely on coaches for semi-formal support with mental health despite stigma and deselection concerns, but a new study highlights little research has been conducted in this “crucial” area.

 

Most of the research focused on formal sources of support (55%) such as psychologists or counsellors, with only 2% of papers looking at athlete interactions with semi-formal support such as coaches or academic advisors. 26% both formal and semi-formal were looked at.

Attitudes to seeking help

Athletes’ attitudes to seeking support for their mental health was the most researched area among the studies that the team looked at, with 79% of papers investigated incorporating this question.

Notably, access was the least studied area with less than a third (32%) of papers investigating this issue, despite being a foundational factor in help-seeking behaviour.

Where next?

In addition, the study highlights gaps in studies looking at athlete help-seeking in lower-income and non-Western contexts, where cultural and structural barriers may differ. The team suggest that future research should also explore semi-formal sources of support more thoroughly, especially given their accessibility and potential influence on athletes’ willingness to seek help. Additionally, a more consistent use of validated help-seeking measures and established psychological help-seeking theories and frameworks would strengthen study comparability and impact.

Professor Jennifer Cumming from the University of Birmingham and senior lead author of the study said:

"This is important research to understand where more focus is needed. For us to have the best possible models of support for athletes, it’s important that we have a strong evidence base to work from.”

 

Destructive cosmic airbursts likely more common than previously believed



A 12,800-year-old layer with cometary dust, microspherules, and platinum anomaly recorded in multiple cores from Baffin Bay


University of California - Santa Barbara




(Santa Barbara, Calif.) — Touchdown airbursts — a type of cosmic impact that may be more common than the crater-forming, dinosaur-killing kind — remain somewhat less understood. UC Santa Barbara Earth Science Emeritus Professor James Kennett and collaborators continue to make the case that these high-energy events deserve closer attention. 

“Touchdown events can cause extreme damage through very high temperatures and pressures,” Kennett said. “And yet they don’t necessarily form a crater, or they form ephemeral surface disturbances, but they’re not the classic major craters that come from direct impacts.”

In four recently published papers, Kennett and co-authors presented evidence for several cosmic airbursts of different ages — events in which the impactor, such as a comet, explodes above ground, sending heat and shockwaves to the Earth’s surface.  From the North Atlantic deep-sea floor to a site of an ancient desert civilization, these papers present a bevy of new evidence in support of the extremely high temperatures and pressures associated with these events. The so-called impact proxies include rare elements and minerals derived from the comet itself, molten glass and spherules formed from terrestrial materials at high temperatures, and shocked quartz, which displays patterns of cracks in this very hard material.

New evidence in the marine record
In a study published in the journal PLOS One, the research team reports, for the first time, the discovery of impact proxies in ocean sediments associated with the Younger Dryas Impact Hypothesis (YDIH). These records are described in several deep-sea cores in Baffin Bay, located off the western coast of Greenland.

“Baffin Bay is very significant because it’s the first time we’ve found evidence for the Younger Dryas cosmic impact event in the marine record,” Kennett said. According to this hypothesis, a fragmented comet exploded above Earth some 12,800 years ago, triggering an anomalous global cooling period called the Younger Dryas, the extinction of many large animals, and human population and cultural changes. Because the comet was fragmented, the impacts of several bodies resulted in areas of widespread burning evidenced in a “black mat” carbon-rich sediment layer. The layer, which has been found mostly in the Northern Hemisphere at sites across the Americas and Europe, also contains peak abundances of platinum and iridium, as well as metallic melt spherules, shocked quartz, and minerals fused together forming meltglass.

“They’re preserved in marine sediments as deep as about 2,000 meters,” Kennett said. The presence of these proxies doesn’t say anything in particular about the actual shocks, he explained, but rather illustrate their force, reach and allude to the event’s subsequent climatological impacts. “The material was thrown up into the atmosphere, and was globally transported and deposited in a broadly distributed layer that we earlier have described.”

Potentially the first known crater of Younger Dryas Boundary (YDB) Age
Impacts with Earth by extraterrestrial material vary in magnitude from the daily bombardment of Earth by tons of fine extraterrestrial dust to the dinosaur killers that occur on a timescale of tens of millions of years. Because the more extreme events leave their marks on Earth in the form of craters, much of the “gold standard” evidence of cosmic impacts is aligned with these structures and the character of associated material. As a result, proving the occurrence of a touchdown airburst becomes a challenge, given that there are typically no deformations in the landscape. This makes it very difficult to prove such an occurrence in the same way that the Chicxulub crater off Mexico’s Yucatán Peninsula has been linked to the massive impact that led to the extinction of dinosaurs.

“Previously, there has been no evidence for the Younger Dryas boundary (YDB) event of any crater or possible crater,” said Kennett. “So these events are more difficult to detect, especially when they are older than a few thousand years and after being buried, leave little or no superficial evidence.”

However, a shallow seasonal lake near Perkins in southeast Louisiana could be the first known such crater formed during the YDB. Reporting in the ScienceOpen journal Airbursts and Cratering Impacts, the research team followed up on a speculation first made in 1938 by the property owner that the seasonal lake could be an impact crater based on its shape and a “crater-like rim raised about 1 meter above the surrounding terrain.” It wasn’t until 2006 that the sediments in and around the shallow depression began to be examined for impact proxies; from then until 2024, the team also examined sediment from several lake cores, finding spherules, meltglass and shocked quartz, which they determined by radiocarbon dating to support the Younger Dryas impact event. Nevertheless, the researchers said that “further research would be beneficial for testing the hypothesis that the lake/depression resulted from a cosmic impact.”

Tunguska and Tall el-Hammam revisited
Shocked quartz — grains of quartz that show fractures and cracks that could only have been produced by high temperatures and pressures — have long been considered evidence for impact. However, this line of reasoning has typically been reserved for the larger crater-forming impacts, which tend to form parallel fractures in this hard material. In a pair of papers in Airbursts and Cratering Impacts, the researchers continue to bolster their argument for a range of fracture patterns that could be indicative of airbursts. To do so, they examined sediments from the site of the Tunguska event — an airburst that occurred over Siberia in 1908, and revisited evidence from Tall el-Hammam, the site of a major ancient city in the Levant that is thought to have experienced a similar-sized event about 3,600 years ago.

“The interesting thing about Tunguska is that it is the only recorded historical touchdown event,” Kennett said, and indeed, there are documented eyewitness reports of a fireball in the sky, and photographs of flattened trees. However, for all the studies of the fallen trees and the soils at the impact site, there had up until now been little effort in search of cosmic impact proxies. This study is the first comprehensive evidence of airburst/impact proxies at Tunguska.

The researchers’ analysis of Tunguska revealed shocked quartz grains with the telltale planar deformations and fractures, some filled with meltglass. In addition, they found impact-produced spherules and melted metal and carbon. The high energies related to this impact may also have produced small ground depressions, now existing as swamps and lakes.

Meanwhile, they also expanded their evidence for a proposed Middle Bronze Age-era airburst over Tall el-Hammam in the southern Jordan Valley. In addition to previous reporting of the usual suspects of spherules, carbon, meltglass and rare minerals, the researchers have described shocked quartz with a variety of fracture patterns similar to those in Tunguska sediments, including the classical parallel cracks, but also web-like, curved and sub-planar fissures, indicative of a range of high pressures and directionality resulting from the blast.

Taken together, these papers point to the idea that cosmic impacts, and in particular touchdown airbursts, may occur more often than previously thought.

“They’re far more common, but also possess much more destructive potential than the more localized, classic crater-forming asteroidal impacts.” said Kennett. “The destruction from touchdown events can be much more widespread. And yet they haven’t been very well studied, so these should be of interest to humanity.”