The 366 daily episodes in 2014 were chronological snapshots of earth history, beginning with the Precambrian in January and on to the Cenozoic in December. You can find them all in the index in the right sidebar. In 2015, the daily episodes for each month were assembled into monthly packages, and a few new episodes were posted. Now, the blog/podcast is on a weekly schedule with diverse topics, and the Facebook Page showcases photos on Mineral Monday and Fossil Friday. Thanks for your interest!

Wednesday, January 15, 2014

January 6: Fossils of the Fig Tree Group

by Richard I. Gibson

The Fig Tree Group of rocks in eastern South Africa contains some relatively well-preserved fossils around 3.2 billion years old, probably bacterial mats that built up into forms called stromatolites, similar to the convoluted thin layers in the image at right (Siyeh Formation, Glacier National Park, public domain photo, National Park Service).

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