Conodont biostratigraphy in the Early to Middle Ordovician strata of the Oslobreen Group in Ny Friesland, Svalbard

Journal article


Publication Details

Author(s): Lehnert O, Stouge S, Brandl P
Journal: Zeitschrift der Deutschen Gesellschaft für Geowissenschaften
Publisher: Schweizerbart und Borntraeger
Publication year: 2013
Volume: 164
Journal issue: 1
Pages range: 149-172
ISSN: 1860-1804


Abstract


The remotely located Cambro-Ordovician strata in Ny Friesland, NE Spitsbergen, Svalbard, are referred to the Oslobreen Group, which is composed of the Tokammane, Kirtonryggen and Valhallfonna formations. Herein we record the conodont succession of the Kirtonryggen and Valhallfonna formations. Collections of well-preserved conodonts (CAI 1) have been recovered from the Lower to lower Middle Ordovician interval in the region. Eight regional conodont zones are established in this preliminary study of the Oslobreen Group exposed at Hinlopenstretet, NE Svalbard. In ascending order these zones are: Rossodus manitouensis, Macerodus dianae, Oneotodus costatus, Oepikodus communis, O. evae, O. inter-medius, Periodon aff. flabellum-Periodon hankensis and Periodon macrodentatus. The yield is relatively poor for the Kirtonryggen Formation, but the oldest Ordovician conodont faunas span the Trema-docian Rossodus manitouesis through Macerodus dianae zones followed by the Floian Oepikodus communis Zone. The taxa are typical of the tropical North American Midcontinent faunal province that dominated the region until open marine associations invaded the shallow shelf (i.e. Evae transgression). The pandemic Oepikodus evae becomes frequent and is succeeded by O. intermedius in abundance in the lower Valhallfonna Formation (Olenidsletta Member). The upper strata are characterised by the Periodon-Paroistodus assemblage characteristic for outer shelf and slope environments around Laurentia. In total, this formation comprises the Floian and Dapingian stages and ends in the early Darriwilian Periodon macroden-tatus Zone in this region. The Ny Friesland faunas show affinities to coeval assemblages from Northeast Greenland and West Newfoundland. © 2013 E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany.



FAU Authors / FAU Editors

Brandl, Philipp
Lehrstuhl für Endogene Geodynamik
Lehnert, Oliver PD Dr.
Professur für Paläontologie (Schwerpunkt Faziesanalyse)


External institutions
University of Copenhagen


How to cite

APA:
Lehnert, O., Stouge, S., & Brandl, P. (2013). Conodont biostratigraphy in the Early to Middle Ordovician strata of the Oslobreen Group in Ny Friesland, Svalbard. Zeitschrift der Deutschen Gesellschaft für Geowissenschaften, 164(1), 149-172. https://dx.doi.org/10.1127/1860-1804/2013/0003

MLA:
Lehnert, Oliver, Svend Stouge, and Philipp Brandl. "Conodont biostratigraphy in the Early to Middle Ordovician strata of the Oslobreen Group in Ny Friesland, Svalbard." Zeitschrift der Deutschen Gesellschaft für Geowissenschaften 164.1 (2013): 149-172.

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Last updated on 2018-09-08 at 16:38