Skip to Main Content
GEOREF RECORD

Taphonomy and paleoecology of an ophiuroid-stylophoran obrution deposit from the Lower Devonian Bokkeveld Group, South Africa

Mhairi Reid, Wendy L. Taylor, Carlton E. Brett, Aaron W. Hunter and Emese M. Bordy
Taphonomy and paleoecology of an ophiuroid-stylophoran obrution deposit from the Lower Devonian Bokkeveld Group, South Africa
Palaios (April 2019) 34 (4): 212-228

Abstract

The taphonomy of a well preserved ophiuroid-stylophoran assemblage from the Bokkeveld Group, Lower Devonian of South Africa is described using micro-CT scanning techniques. This assemblage provides a taphonomic window into the structure of Early Devonian, echinoderm-dominated communities within the Malvinokaffric Realm of SW Gondwana. Micro-CT scanning and 3D modeling of a portion of an obrution bed revealed an assemblage of over 700 ophiuroids observed of the newly described Gamiroaster tempestatis Reid 2019 associated with two species of stylophorans of two species, the mitrates Paranacystis cf. petriiCaster 1954 and Placocystella africana (Reed 1925). The 3D model permitted detailed sedimentologic and taphonomic analysis of the bed including determination of the degree of fossil articulation, orientation, and faunal counts. The results indicate that deposition took place in a storm-influenced, shallow marine environment smothering both attached and vagrant taxa of the benthic community during a high-energy storm event. Micro-CT scanning is a powerful taphonomic tool for the non-destructive analysis of delicate echinoderm assemblages that would otherwise be difficult to study.


ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 34
Serial Issue: 4
Title: Taphonomy and paleoecology of an ophiuroid-stylophoran obrution deposit from the Lower Devonian Bokkeveld Group, South Africa
Affiliation: University of Cape Town, Department of Geological Sciences, Rondebosch, South Africa
Pages: 212-228
Published: 201904
Text Language: English
Publisher: Society for Sedimentary Geology, Tulsa, OK, United States
References: 114
Accession Number: 2019-037994
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. col., 4 plates, geol. sketch map
S33°23'60" - S33°23'60", E19°51'00" - E19°51'00"
Secondary Affiliation: University of Cincinnati, USA, United StatesUniversity of Cambridge, GBR, United Kingdom
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, 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: 2019
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal