Limestone slab packed with Devonian Placoderm bone

Fossils of Arizona

Fossil of the Month
Triassic shale with fossil seed
Updated 9/18/16
This section is devoted to showing off our most interesting monthly finds. Check back montly for updates!
Latest images below:
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October 9, 2016

Left: Shark Coprolites from the Permian Supai formation at the Christopher Creek uranium mine. Fossilized excretra such as this can provide clues to animals which did not leave any bones or other remains, and what thier diet may have consisted of.

Previous Fossil of the Month Entries:
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September 18, 2016

Left: Polished quarter sized specimen of a Mescal Limestone stromatolite. This is from the "Algal Member" of the Mescal, found near Roosevelt Lake. Here we can see in this silicified specimen the nested cone structure typical of fossil algae found in Arizona.