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Araucarioxylon arizonicum is an extinct species of conifer that is the state fossil of Arizona
Yorktown Formation (Miocene)
It is complete all the way to the aperture
This mode of preservation is very typical for the locality
Eocene Green River Bird Feather with Insects VF-PCM-16-021 Petrified Wood Araucarioxylon arizonicum is an extinctBird 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
