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fish--- mississippian
The skeleton was given the nickname Tinker in honor of its discoverer
USA Formation: Santana Age: Early Cretaceous
Because of their nearly perfect condition it is assumed that their death was not caused by force
5---mammoth carving
Aragonite, 35 crystals per flat Protoceratops fish--- mississippian35 Specimens of Argonite Per Flat In 2x2 Inch Boxes. Aragonite is a carbonate mineral, one of the two common, naturally occurring polymorphs of calcium carbonate, CaCO3. The other polymorph is the mineral calcite. Aragonite's crystal lattice differs from that of calcite, resulting in a different crystal shape, an orthorhombic system with acicular crystals. Repeated twinning results in pseudo hexagonal forms. Aragonite may be columnar or fibrous,