Skip to Main Content
GEOREF RECORD

A paleoecologic comparison of two edrioasteroid (Echinodermata) encrusted pavements from the Upper Ordovician Corryville Formation of Florence, Kentucky and the Miamitown Shale of Sharonville, Ohio, U.S.A.

Rene A. Shroat-Lewis, Colin D. Sumrall, Michael L. McKinney and David L. Meyer
A paleoecologic comparison of two edrioasteroid (Echinodermata) encrusted pavements from the Upper Ordovician Corryville Formation of Florence, Kentucky and the Miamitown Shale of Sharonville, Ohio, U.S.A.
Palaios (April 2014) 29 (4): 154-169

Abstract

Occurrences of articulated, multi-element skeletons of edrioasteroids provide evidence of sudden burial and an opportunity for detailed paleoecologic analysis. This study examines two catastrophically buried communities of edrioasteroids from Florence, Kentucky and Sharonville, Ohio. In these two occurrences, the edrioasteroids Isorophus cincinnatiensis, Streptaster vorticellatus, and Carneyella pilea utilized brachiopod and mollusk shells as hard substrates for attachment. Age structure analysis for specimens of Isorophus cincinnatiensis on both pavements show right-skewed distributions that are attributed to high juvenile mortality. Thecae on the Florence pavement have slight bimodal preferential orientation, likely in response to current flow, whereas no preferential thecal orientation was noted for specimens on the Sharonville pavement. Spatial analysis of the Florence pavement indicates a clustered edrioasteroid distribution resulting from multiple edrioasteroids attached to single brachiopod shells. Edrioasteroid margin deformation, in response to inter- and intraspecific competition, provides evidence that edrioasteroids were unable to move once attached to the substrate. Spatial analysis for Isorophus cincinnatiensis on the Sharonville pavement shows few instances of multiple edrioasteroids attached to individual shells. Instead, this clustered distribution suggests enhanced encrustation in areas of enhanced survival (i.e., increased feeding opportunity). The high degree of thecal disarticulation on the Sharonville pavement suggests postmortem bloating and rupture.


ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 29
Serial Issue: 4
Title: A paleoecologic comparison of two edrioasteroid (Echinodermata) encrusted pavements from the Upper Ordovician Corryville Formation of Florence, Kentucky and the Miamitown Shale of Sharonville, Ohio, U.S.A.
Affiliation: University of Arkansas, Department of Earth Sciences, Little Rock, AR, United States
Pages: 154-169
Published: 201404
Text Language: English
Publisher: Society for Sedimentary Geology, Tulsa, OK, United States
References: 59
Accession Number: 2014-055680
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, sketch map
N39°00'00" - N39°00'00", W84°39'00" - W84°39'00"
N39°16'60" - N39°16'60", W84°24'00" - W84°24'00"
Secondary Affiliation: University of Tennessee, USA, United StatesUniversity of Cincinnati, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by SEPM (Society for Sedimentary Geology), Tulsa, OK, United States
Update Code: 201430
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal