67 Omnipresent Ichnology: Traces of Life From Mountain Slopes to the Deep Sea

Tuesday, 21 March 2017
1:30 PM - 5:30 PM
Lawrence Welk Room, Mezzanine Level

PRELIMINARY LOOK AT TRACE FOSSILS IN THE LATE CRETACEOUS COLERAINE FORMATION; HILL ANNEX STATE PARK, CALUMET, MINNESOTA

Paper number: 67-7
Program: Theme Sessions
Time: 3:30 PM – 3:50 PM

Authors

Abstract

There has been little mention of trace fossils of the Coleraine Formation in the literature discussing the Cretaceous outcrops in Minnesota. The paleontological work to date has focused primarily on the marine invertebrate and ichthyological assemblages that have been recovered. The Coleraine formation is made up of conglomerates, shales, and sandstones that are considered Cenomanian to Turonian in age. The paleo environment for the Coleraine Formation is characterized as a sequence of transgressions and regressions of the Western Interior Sea. The trace fossils found at Hill Annex State Park consists of burrows of Ophiomorpha and possibly Thalassinoides, along with others showing evidence of crustaceans that have not been described. Borings in the fossilized wood show evidence of Teredolites sp. and a wood boring Gastropod of unknown type.

Geological Society of America Abstracts with Programs. Vol. 49, No. 2

doi: 10.1130/abs/2017NE-291026

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