Back to the Past
by Enrico Bonino

<Fillmore Formation image>  

 
"Fillmore Formation"

The Fillmore Formation (Early Ordovician) is a mixed carbonatic-siliciclastic unit that accumulated on a rapidly subsiding platform. Orthoceratids, crinoids, sponges, early agnate fish and trilobites (Pseudocybele) are the main organisms that lived in this platform marine environment.

Media: Adobe Photoshop.

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