Fossil Fish- Diplomystus & Priscacara Plate


In stock


Genus: Diplomystus (larger) / Priscacara (smaller)

Plate size: 8.75 x 19 x .43″ ‘
Weight: 3.8 Lbs

Some 58 million years ago in the Green River region of Wyoming, torrential
rains formed wide, shallow lakes, home to a variety of fish. Though most
of these species are now extinct, the Diplomystus and Knightia were both
ancestors of the herring, the Mioplosus was a perch, and the Priscacara has
no modern relatives. For reasons which are unclear, many of these fish met
their death under catastrophic conditions. Their remains were covered by a
fine deposit of calcium carbonate so gently that every delicate outline was
preserved. Each year this protective cover became thicker from added layers
of limestone sediments and became known as Green River Shale. It took
many years for these fish to fossilize, a process by which the original bones,
skin, and scales were replaced, molecule by molecule, with the minerals in
the sediment that buried them.

Additional information


United States