Yelma digitata Stromatolites


(Hand Polished)

Geological Time: Lower Cambrian (520 million years old)

Size (25.4 mm = 1 inch): 145 mm by 110 mm (maximum)

Fossil Site: Arbuckle Mountains, Oklahoma

Code: ST95

Price: $50.00

Description: This is a younger (Lower Cambrian) stromatolite from the Arbuckle Mountains in Oklahoma. By the time this stromatolite formed, the cyanobacterial organisms and their stromatolitic reef system had already undergone a steep decline, and were becoming restricted to environments less favorable to other marine life with which they competed or from which they suffered predation.

This one derives its informal name from its namesake which comes from Australia.

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