Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Bathymetric limits of a Carboniferous orthoconic nautiloid deduced by finite element analysis

R. A. Hewitt, M. A. Dokainish, M. El Aghoury and gerd E. G. Westermann
Bathymetric limits of a Carboniferous orthoconic nautiloid deduced by finite element analysis
Palaios (April 1989) 4 (2): 157-167

Abstract

The last septum and adjacent portions of a Carboniferous nautiloid Michelinoceras unicamera (Smith) have been subjected to a finite element analysis involving 387 nodal points concentrated at the septal suture of the last septum. At a depth of about 1125 m and an external water pressure of 11.35 MPa, the shell would have imploded almost simultaneously in the septum, the sutures and the shell walls overlying the septum. Stress distributions support the validity of the highest septal strength index so far obtained from any nautiloid and suggest the Michelinoceras unicamera lived in basins and continental slope environments near southern Oklahoma. Our analysis shows the structural importance of the mural ridge underlying the septal suture: without it, the implosion depth would have been halved.


ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 4
Serial Issue: 2
Title: Bathymetric limits of a Carboniferous orthoconic nautiloid deduced by finite element analysis
Affiliation: McMaster Univ., Dep. Geol., Hamilton, ON, Canada
Pages: 157-167
Published: 198904
Text Language: English
Publisher: Society of Economic Paleontologists and Mineralogists, Tulsa, OK, United States
References: 38
Accession Number: 1989-071266
Categories: StratigraphyInvertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, sketch map
N34°19'00" - N34°37'60", W97°20'60" - W96°49'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by SEPM (Society for Sedimentary Geology), Tulsa, OK, United States
Update Code: 1989
Close Modal

or Create an Account

Close Modal
Close Modal