Seirocrinus subangularis, Dactylioceras commune Jurassic Posidonienschiefer Formation, Holzmaden, Germany The 180-million-year-old Posidonia Shale of Holzmaden is famous for its exceptional preservation of prehistoric marine animals. This large black slate contains a beautiful 19-inch crinoid, which consists of a 5-inch diameter Calyx (flower) and a 12-inch long curving stem. Also on the matrix are 11 golden brown ammonites measuring up to 3 inches in diameter. The black slate serves as a perfect background to complement the golden-brown fossils. Backed with wood. Matrix measures 26.5 x 20in
Seirocrinus subangularis, Dactylioceras commune Jurassic Posidonienschiefer Formation, Holzmaden, Germany The 180-million-year-old Posidonia Shale of Holzmaden is famous for its exceptional preservation of prehistoric marine animals. This large black slate contains a beautiful 19-inch crinoid, which consists of a 5-inch diameter Calyx (flower) and a 12-inch long curving stem. Also on the matrix are 11 golden brown ammonites measuring up to 3 inches in diameter. The black slate serves as a perfect background to complement the golden-brown fossils. Backed with wood. Matrix measures 26.5 x 20in
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