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Fish and frond
A perfectly preserved fish resting by a perfectly preserved palm frond...This slab on display at the Field Museum of Natural History, Chicago, comes from Fossil Lake Basin, Wyoming, a locality that has yielded exquisite specimens of a variety of organisms. Special conditions are required for this kind of uncommon preservation.
Palm fronds
Fossil impressions of palm fronds exposed on a verticalized bedding surface of fine sandstone in the Maastrichtian Laramie Formation, near Golden CO. The integrity of individual fronds implies that minimal decomposition took place prior to burial. Scale bar is 40 cm long.