Depositional occurrence of a Xenocrinus penicillus S.A. Miller (Crinoidea) bed in the Upper Ordovician of Southwestern Ohio
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Date
1987-03
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The Ohio State University
Abstract
A bed of excellently preserved Xenocrinus penicillus s. A. Miller (Crinoidea) from the Upper Ordovician Bull Fork Formation is interpreted to be the result of storm deposition. A single bed contained 44 X. penicillus crowns, and some specimens had lengths of stem attached. This materal is from a 10 m section of Upper Ordovician strata in Warren County, Ohio. The entire sequence, as well as the crinoid bed, is interpreted to be storm dominated based upon the following criteria: beds vary in thickness and pinch-out, generally fine upwards, have sharp erosional bases and gradational upper contacts; ripple cross and horizontal laminations are present, and cement filled voids are common.
Description
Research Award 1987