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August30, 1909 The Burgess Shales Were Discovered by Charles Walcott. Consisting of Dark Mudstone, the Deposits Contain Diverse Soft Body Fossils, Dating From The Cambrian Era 509,000,000 Years Ago. The Picture is of a Marella Splendens, Peculiar to the Burgess Shales

August30, 1909 The Burgess Shales Were Discovered by Charles Walcott. Consisting of Dark Mudstone, the Deposits Contain Diverse Soft Body Fossils, Dating From The Cambrian Era 509,000,000 Years Ago. The Picture is of a Marella Splendens, Peculiar to the Burgess Shales

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Crinoids fossil: crinoids filled the seas during the Carboniferous period and even earlier. Their fossils are frequently found in limestone from the period, giving the Carboniferous the nickname the “Age of the Crinoids [1280 x 1024]

Crinoids fossil: crinoids filled the seas during the Carboniferous period and even earlier. Their fossils are frequently found in limestone from the period, giving the Carboniferous the nickname the “Age of the Crinoids [1280 x 1024]

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Though not fossils in the /strictest/ sense, banded iron formations are indirectly the product of photosynthetic bacteria that oxygenated the atmosphere ~2.4 billion years ago, which caused massive amounts of oxidized iron to precipitate from sea water. And they look really cool. [768×1024]

Though not fossils in the /strictest/ sense, banded iron formations are indirectly the product of photosynthetic bacteria that oxygenated the atmosphere ~2.4 billion years ago, which caused massive amounts of oxidized iron to precipitate from sea water. And they look really cool. [768×1024]