Till Bayer
Abstract
Sixty-seven specimens of Astylospongia cf. A. praemorsa (Goldfuss) were collected from the surface of a single weathered outcrop of the Elgin Member of the Maquoketa Formation (Upper Ordovician). This is the first report of a lithistid sponge from the Ordovician rocks of the upper Mississippi Valley.
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Sixty-seven specimens of Astylospongia cf. A. praemorsa (Goldfuss) were collected from the surface of a single weathered outcrop of the Elgin Member of the Maquoketa Formation (Upper Ordovician). This is the first report of a lithistid sponge from the Ordovician rocks of the upper Mississippi Valley.
Key concepts: Ordovician, Outcrop, Paleontology, Geology, Sponge