But when you look back 3.45 billion years, to the early Archean period of geologic history, things aren't quite so simple. "Because stromatolites from this period of time have been around longer ...

But when you look back 3.45 billion years, to the early Archean period of geologic history, things aren't quite so simple. "Because stromatolites from this period of time have been around longer ...

Stromatolites are layered carbonate structures ... increasing atmospheric oxygen around 2.2 billion years ago during the ...

Stromatolites weren’t one distinct creature ... to an almost unimaginably remote time known as the Archean Eon. Read More: What Are the Oldest Fossils in the World? Back then, Earth was nothing like ...

Warrawoona Group stromatolites (3.46 billion years old ... The fossils of this rock sequence are commonly found in ancient Archean chert, a hard, fine-grained sedimentary rock composed of ...

“It was like their own paleo-Archean parade, and they had all their ... as you would expect for stromatolites, random parts of the cones should be cut through. So Allwood and her team visited ...

That oxygen initially wiped out stromatolites’ competition, enabling their prominence in the Archean and early Proterozoic environment. However, as more life forms adapted their metabolism to an ...

Both stromatolites and MISS are first found in the early Archean, more than three billion years ago, recording highly evolved microbial activity quite early in Earth's history. Whereas the ...

Scientists have discovered a previously hidden ecosystem with an expansive system of lagoons in the salt plains of Puna de Atacama, an arid plateau in Argentina — with giant stromatolites that ...