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silcrete plant fossilsNewsweek
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87% Informative
A study of fossil sites in Australia has revealed "exquisitely preserved" plants that lived millions of years ago .
The material in which the fossils described in the study occur is called silcrete.
This hard substance is formed when soil, sand or gravel is cemented together by dissolved silica.
The study authors concluded that such sites occur commonly in eastern Australia and always associated with volcanic materials.
These regions—along with others—were all once part of an ancient supercontinent known as Gondwana that had fully formed around 600 million years ago and began to fragment roughly 180 million years ago . "So remarkably preserved, the silcrete plant fossils are now providing startling new insights into the history of some groups of Australian plants and the vegetation types in which they grew," Rozefelds wrote for The Conversation. Related Articles Start your unlimited Newsweek trial.
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