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The ammonite is 11
Marshosaurus bicentesimus with Allosaurus sp
Recently however new nearly complete specimens found in Colorado are being studied and will add significant detail to knowledge of the genus
Cedrelospermum nervosum seed
Eocene Green River Unidentified Calyx P-PCM-16-084 Brittle Star The ammonite is 11Unidentified Calyx Green River Formation Parachute Creek Member Middle Eocene Uintah County, Utah This is a very well preserved but unidentified calyx. It has 4 sepals, but it appears that there are no petals present. The calyx is very coriaceous and has a heavy carbon residue of carbon. The upper part of the Green River Formation in the eastern Uinta Basin is present in two stratigraphic intervals separated by approximately 250 m of sandstone,
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