High resolution tephrostratigraphy, fossil record and age of Carboniferous-Permian glaciomarine mudstones within the Dwyka Group of southern Namibia.

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Bangert B, Stollhofen H, Geiger M, Lorenz V
Zeitschrift: Communications - Geological Survey of Namibia
Jahr der Veröffentlichung: 2000
Heftnummer: 12
Seitenbereich: 235-245
ISSN: 1026-2954
Sprache: Englisch


Abstract


The Carboniferous Dwyka Group in southern Namibia can be subdivided into four upward-fining deglaciation sequences, each capped by relatively fine-grained glaciolacustrine or glaciomarine deposits. The uppermost part of the second deglaciation sequence comprises a thick fossiliferous mudstone unit, referred to as the ”Ganigobis Shale Member”. An abundance of marine macro- and ichnofossils as well as extrabasinally derived ashfall tuff horizons characterise the mudstones and provide the basis for an integrated high-resolution biostratigraphic and tephrostratigraphic framework. The marine body and trace fossils record the extent of the first of a series of marine incursions into the disintegrating Gondwanan interior as early as the Carboniferous. Juvenile magmatic zircons separated from tuff horizons interbedded with the Ganigobis Shale Member yield SHRIMP-ages of 300-302 Ma. This dates the uppermost part of the second deglaciation sequence in southern Namibia to the late Carboniferous (Gzelian) and provides a minimum age for the onset of Karoo-equivalent marine deposition prior to the much more widespread Eurydesma transgression.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Stollhofen, Harald Prof. Dr.
Lehrstuhl für Geologie (Exogene Dynamik)


Einrichtungen weiterer Autorinnen und Autoren

Julius-Maximilians-Universität Würzburg


Forschungsbereiche

Beckenanalyse
Lehrstuhl für Geologie (Exogene Dynamik)
Klima & Paläoumwelt
Lehrstuhl für Geologie (Exogene Dynamik)


Zitierweisen

APA:
Bangert, B., Stollhofen, H., Geiger, M., & Lorenz, V. (2000). High resolution tephrostratigraphy, fossil record and age of Carboniferous-Permian glaciomarine mudstones within the Dwyka Group of southern Namibia. Communications - Geological Survey of Namibia, 12, 235-245.

MLA:
Bangert, Berthold, et al. "High resolution tephrostratigraphy, fossil record and age of Carboniferous-Permian glaciomarine mudstones within the Dwyka Group of southern Namibia." Communications - Geological Survey of Namibia 12 (2000): 235-245.

BibTeX: 

Zuletzt aktualisiert 2018-08-09 um 07:09