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A new Lagerstätte from the Middle Ordovician St. Peter formation in northeast Iowa, USA

Geology

By:
, , , , , and
DOI: 10.1130/G22911A.1

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Abstract

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 a variety of invertebrates and vertebrates, including soft body tissues, impressions, and 3-dimensionalpreservations. The exceptional preservation reveals a new Konservat-Lagerstätte, the Winneshiek Lagerstätte, and opens a unique window into the community that inhabited the margins of the Laurentian cratonic seaway during Middle Ordovician transgression. Among the fossils, several conodont assemblages, including the apparatus of enigmatic coleodontids, are preserved. Some conodont assemblages associated with soft body tissues are particularly noteworthy.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A new Lagerstätte from the Middle Ordovician St. Peter formation in northeast Iowa, USA
Series title:
Geology
DOI:
10.1130/G22911A.1
Volume
34
Issue:
11
Year Published:
2006
Language:
English
Publisher:
Geological Society of America
Description:
4 p.
First page:
969
Last page:
972
Online Only (Y/N):
N
Additional Online Files(Y/N):
N