The vast North American Phosphoria Rock Complex might be rich in silica because it was home to millions of sea sponges almost 300 million years ago, whose fossils were misdiagnosed until now
PLOS
image:
Meadows of sponges once covered nearly 400 miles (600 km) of the ancient seafloor of western U.S.A.
view moreCredit: A.M. Rasmussen, CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/)
The vast North American Phosphoria Rock Complex might be rich in silica because it was home to millions of sea sponges almost 300 million years ago, whose fossils were misdiagnosed until now
Article URL: http://plos.io/47syMdi
Article title: Glass factory found: Basinwide (600 km) preservation of sponges on the Phosphoria glass ramp, Permian, USA
Author countries: U.S.
Funding: WM- Idaho State University Geosciences Geslin Award, https://www.isu.edu/geosciences/resources/endowments_grants_scholarships/Tobacco WM- Root Geological Society, www.trgs.org KR- ACS PRF 56988, American Chemical Society, https://www.acs.org/ ZW-Paleontological Society Student Research Grant.
Glass factory found: Basinwide (600 km) preservation of sponges on the Phosphoria glass ramp, Permian, USA
Sponge hand sample.
Credit
Idaho State University, CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/)
Journal
PLOS One
Article Title
Glass factory found: Basinwide (600 km) preservation of sponges on the Phosphoria glass ramp, Permian, USA
Article Publication Date
12-Nov-2025
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