"The mechanism which caused the crust that had been altered by seawater to sink into the mantle functioned over 3.3 billion years ago. This means that a global cycle of matter, which underpins modern plate tectonics, was ...
Earth Sciences
Jul 18, 2019
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Life took hold on land at least as early as 3.2 billion years ago, suggests a study by scientists from Berlin, Potsdam and Jena (Germany). The team led by Sami Nabhan of the Freie Universität Berlin studied ancient rock ...
Earth Sciences
Nov 7, 2016
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The modern sedimentary environment contains a diversity of microbes that interact very closely with the sediments, sometimes to such an extent that they form "biosediments." But can such a phenomenon be fossilized? How far ...
Earth Sciences
May 28, 2015
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(Phys.org) —In the hunt for early life, geobiologists seek evidence of ancient microbes in the form of trace fossils – geological records of biological activity – embedded in lavas beneath the ocean floor. Filamentous ...
