This Specimen has been sold.
5.2" Fossil Fish (Cockerellites) - Green River Formation
This is an 5.2" long Cockerellites (Priscacara) liops from the 18 Inch Layer, Green River Formation of Wyoming. It is very well preserved and shows bones and fin rays. Under magnification overlapping scales can be seen. The dark mass above the fish's head is likely a fish coprolite (feces).
Comes with an acrylic stand.
Comes with an acrylic stand.
Specimens like this come from the coveted 18 inch layer of the Green River Formation, which produces darker and more detailed fish than the majority on the market. The rock from this layer is much harder and more durable than other layers in the formation, likely due to its initial deposition conditions in deep water. Because of these conditions, fish found in the 18-inch layer can be extracted whole and in excellent condition. This layer is typically collected at night using low-angle light to see the bump in the rock that the fish's backbone creates. They then cut these fish out and take them to a lab where the fish, which may be up to an inch under the surface of the rock, are meticulously extracted under microscope with hand tools.
SPECIES
Cockerellites (Priscacara) liops
LOCATION
Kemmerer, Wyoming
FORMATION
Green River Formation - 18 Inch Layer
SIZE
5.2" fish, 6.7 x 4.0" rock
CATEGORY
SUB CATEGORY
ITEM
#114305
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