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The shell is thin in some areas and the underlying sutures are visible
This mode of preservation is very typical for the locality
It is complete all the way to the aperture
Araucarioxylon arizonicum is an extinct species of conifer that is the state fossil of Arizona
The serrations are very good on both the mesial and the distal carinae
Eocene Green River Bird Feather with Insects VF-PCM-16-021 Petrified Wood The shell is thin inBird Feather with Insects Green River Formation Parachute Creek Member Middle Eocene Uintah County, Utah This specimen is a small but good fossilized bird feather from the Green River Formation. The feather has excellent detail. The feather is about 1 cm long. Also seen on this specimen are a variety of fossil insects including several beetles (Coleoptera), gnat (Sackenia), crane fly (Tipula), and fly (Plecia). Even though the Green River Formation is
