8.7" Proterozoic Stromatolite (Yelma) Slab - Australia

This is a 8.7" wide, polished slab of stromatolite (Yelma digitata) fossils from the Yelma Formation in the Earaheedy Basin of Western Australia. It is a vertical slice of the stromatolite colony and the formation has been dated from between 1.95 and 1.97 billion years old.

This specimen comes with an acrylic display stand.

Stromatolites are the layered trace fossils of microbial life, primarily cyanobacteria. Some of them date back an astounding 3.4 billion years, making them the oldest record of life on planet Earth. Stromatolites and Microbialites were typically formed in shallow water by the growth of layer upon layer of cyanobacteria, a single-celled, photosynthesizing microbe. These layers often form very beautiful, and colorful banded structures in the rock.

These oxygen producing cyanobacteria were so simple they lacked DNA packaging nucleus, but were responsible for possibly the largest changes the earth has undergone. They were the only major source of atmospheric oxygen critical for the development of more complex life.
Yelma digitata
Paraburdoo, Earaheedy Basin, Western Australia
Yelma Formation, Earaheedy Group
8.7 x 5.3", .4" thick
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