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4 ounces of dinosaur bone fragments
to positive hypo reliefs with concentric ornamentation (Ediacaria preservation)
interesting bone fragment can be seen in the matrix
late Cretaceous (74-83 million years) near Chadron
Ammonites, 5 species Iguanodon 4 ounces of dinosaur boneThis wonderful mortality plate has 5 species of ammonites. Placenticeras intercalare 8. 5 inches across Baculites compressus cuneatus Holoscaphites landesi Jeletzkytes brevis Rhaeboceras halli They are from the Upper Cambrian, Fox Hills Formation of South Dakota, USA The largest ammonite, Placenticeras is 8. 5 inches across. This specimen is a composite. It is meant to be a study of species which may be found loose or in the mud balls found along the
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