The secret to the fossils’ preservation is up for debate, but McCurry thinks it would have happened over hundreds of years rather than in a sudden event.Original publication, long story at the NY Times.
Iron-rich water, maybe from nearby outcrops, could have flowed into a shallow billabong, periodically deoxygenating the water, killing the organisms or encasing flora and fauna in sediment that turns into the rocks found in the field.
Saturday, January 8, 2022
Miocene Fossils from McGraths Flat, Australia
Amazing fossils from 15 million-year-old deposits in Australia, preserved in iron-rich rocks.