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Here is a great example of a Marshosaurus tooth prepared in its original matrix
This genus of ammonite is small to large-sized with evolute coiling and deep
It is an extant genus and if represented today by about 40 living species
The slab has been repaired
The ammonite is 11
Eocene Green River Unidentified Calyx P-PCM-16-084 Brittle Star Here is a great exampleUnidentified 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,