A new Lagerstätte from the Middle Ordovician St. Peter Formation in northeast Iowa, USA
作者： Huaibao P. Liu , Robert M. McKay , Jean N. Young , Brian J. Witzke , Kathlyn J. McVey
DOI: 10.1130/G22911A.1
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摘要: A new fossil fauna has been discovered from a recently recognized shale unit within the middle Ordovician St. Peter Formation in northeast Iowa. It contains variety of invertebrates and vertebrates, including soft body tissues, impressions, 3-dimensionalpreservations. The exceptional preservation reveals Konservat-Lagerstatte, Winneshiek Lagerstatte, opens unique window into community that inhabited margins Laurentian cratonic seaway during Middle transgression. Among fossils, several conodont assemblages, apparatus enigmatic coleodontids, are preserved. Some assemblages associated with tissues particularly noteworthy.
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