The stratigraphy, sedimentology, and age of the Late Palaeozoic Mesosaurus Inland Sea, SW-Gondwana : new implications from studies on sediments and altered pyroclastic layers of the Dwyka and Ecca Group (lower Karoo Supergroup) in southern Namibia
The Mesosaurus Inland Sea covered, in the Late Paleozoic, vast areas (~5 Mio km2) of the SW-Gondwanan continental interior. Major depocentres are represented by the Karoo basins of SW-Africa and the Paraná Basin in South America. These areas were interconnected prior to the break-up of Gondwana and...
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ftunivwuerz:oai:opus.bibliothek.uni-wuerzburg.de:1918 2024-06-09T07:49:34+00:00 The stratigraphy, sedimentology, and age of the Late Palaeozoic Mesosaurus Inland Sea, SW-Gondwana : new implications from studies on sediments and altered pyroclastic layers of the Dwyka and Ecca Group (lower Karoo Supergroup) in southern Namibia Stratigraphie, Sedimentologie und Alter des spätpaläozoischen Mesosaurus-Inlandmeeres: neue Ergebnisse von Studien an Sedimenten und alterierten Pyroklastika der Dwyka und Ecca Gruppe (untere Karoo Supergruppe) im südlichen Namibia Werner, Mario 2006 application/pdf https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/1918 https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-21757 https://opus.bibliothek.uni-wuerzburg.de/files/1918/00-Complete_thesis-STD.pdf eng eng https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/1918 urn:nbn:de:bvb:20-opus-21757 https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-21757 https://opus.bibliothek.uni-wuerzburg.de/files/1918/00-Complete_thesis-STD.pdf info:eu-repo/semantics/openAccess Karru Stratigraphie Sedimentologie Paläozoikum ddc:550 doctoralthesis doc-type:doctoralThesis 2006 ftunivwuerz 2024-05-10T06:19:47Z The Mesosaurus Inland Sea covered, in the Late Paleozoic, vast areas (~5 Mio km2) of the SW-Gondwanan continental interior. Major depocentres are represented by the Karoo basins of SW-Africa and the Paraná Basin in South America. These areas were interconnected prior to the break-up of Gondwana and the subsequent opening of the South Atlantic Ocean. In Namibia and South Africa deposits of the Mesosaurus Inland Sea are preserved in the successions of the glacial Dwyka Group and the postglacial Ecca Group (Karoo Supergroup). These deposits comprise the major part of a 60-70 Ma depositional cycle and are the main focus of this study. The large-scale transgressive part of this cycle started in the Late Carboniferous with continental glacial deposits followed by marine glacial and postglacial inland sea deposits. During the Early Permian the Mesosaurus Inland Sea reached its greatest extent, which was accompanied by widespread deposition of Corg-rich sediments. The large scale regressive part is recorded by successions ranging from deep water offshore pelites and turbidite sandstones to shallow water shoreface and deltaic sandstones, deposited in a brackish environment. Shallow water inland sea sediments are in turn overlain by fluvio-lacustrine deposits, which are assigned to the Beaufort Group and form the upper part of the cycle. This successive change in the depositional environment from marine to brackish to freshwater is also reflected in the fossil record. During Dwyka times a marine association of the Gondwana faunal province was able to colonize parts of the Mesosaurus Inland Sea. Later, during lower Ecca times, the connection to the Panthalassan Ocean became insufficient to retain normal marine conditions, leading to strong faunal endemism in an isolated and brackish inland sea environ¬ment. The most well-known and widespread representatives of this endemic fauna are mesosaurid vertebrates and megadesmid bivalves. Numerous altered tuffs occur as interlayers within argillaceous sediments of the Dwyka and ... Doctoral or Postdoctoral Thesis South Atlantic Ocean Würzburg University: Online Publication Service |
institution |
Open Polar |
collection |
Würzburg University: Online Publication Service |
op_collection_id |
ftunivwuerz |
language |
English |
topic |
Karru Stratigraphie Sedimentologie Paläozoikum ddc:550 |
spellingShingle |
Karru Stratigraphie Sedimentologie Paläozoikum ddc:550 Werner, Mario The stratigraphy, sedimentology, and age of the Late Palaeozoic Mesosaurus Inland Sea, SW-Gondwana : new implications from studies on sediments and altered pyroclastic layers of the Dwyka and Ecca Group (lower Karoo Supergroup) in southern Namibia |
topic_facet |
Karru Stratigraphie Sedimentologie Paläozoikum ddc:550 |
description |
The Mesosaurus Inland Sea covered, in the Late Paleozoic, vast areas (~5 Mio km2) of the SW-Gondwanan continental interior. Major depocentres are represented by the Karoo basins of SW-Africa and the Paraná Basin in South America. These areas were interconnected prior to the break-up of Gondwana and the subsequent opening of the South Atlantic Ocean. In Namibia and South Africa deposits of the Mesosaurus Inland Sea are preserved in the successions of the glacial Dwyka Group and the postglacial Ecca Group (Karoo Supergroup). These deposits comprise the major part of a 60-70 Ma depositional cycle and are the main focus of this study. The large-scale transgressive part of this cycle started in the Late Carboniferous with continental glacial deposits followed by marine glacial and postglacial inland sea deposits. During the Early Permian the Mesosaurus Inland Sea reached its greatest extent, which was accompanied by widespread deposition of Corg-rich sediments. The large scale regressive part is recorded by successions ranging from deep water offshore pelites and turbidite sandstones to shallow water shoreface and deltaic sandstones, deposited in a brackish environment. Shallow water inland sea sediments are in turn overlain by fluvio-lacustrine deposits, which are assigned to the Beaufort Group and form the upper part of the cycle. This successive change in the depositional environment from marine to brackish to freshwater is also reflected in the fossil record. During Dwyka times a marine association of the Gondwana faunal province was able to colonize parts of the Mesosaurus Inland Sea. Later, during lower Ecca times, the connection to the Panthalassan Ocean became insufficient to retain normal marine conditions, leading to strong faunal endemism in an isolated and brackish inland sea environ¬ment. The most well-known and widespread representatives of this endemic fauna are mesosaurid vertebrates and megadesmid bivalves. Numerous altered tuffs occur as interlayers within argillaceous sediments of the Dwyka and ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Werner, Mario |
author_facet |
Werner, Mario |
author_sort |
Werner, Mario |
title |
The stratigraphy, sedimentology, and age of the Late Palaeozoic Mesosaurus Inland Sea, SW-Gondwana : new implications from studies on sediments and altered pyroclastic layers of the Dwyka and Ecca Group (lower Karoo Supergroup) in southern Namibia |
title_short |
The stratigraphy, sedimentology, and age of the Late Palaeozoic Mesosaurus Inland Sea, SW-Gondwana : new implications from studies on sediments and altered pyroclastic layers of the Dwyka and Ecca Group (lower Karoo Supergroup) in southern Namibia |
title_full |
The stratigraphy, sedimentology, and age of the Late Palaeozoic Mesosaurus Inland Sea, SW-Gondwana : new implications from studies on sediments and altered pyroclastic layers of the Dwyka and Ecca Group (lower Karoo Supergroup) in southern Namibia |
title_fullStr |
The stratigraphy, sedimentology, and age of the Late Palaeozoic Mesosaurus Inland Sea, SW-Gondwana : new implications from studies on sediments and altered pyroclastic layers of the Dwyka and Ecca Group (lower Karoo Supergroup) in southern Namibia |
title_full_unstemmed |
The stratigraphy, sedimentology, and age of the Late Palaeozoic Mesosaurus Inland Sea, SW-Gondwana : new implications from studies on sediments and altered pyroclastic layers of the Dwyka and Ecca Group (lower Karoo Supergroup) in southern Namibia |
title_sort |
stratigraphy, sedimentology, and age of the late palaeozoic mesosaurus inland sea, sw-gondwana : new implications from studies on sediments and altered pyroclastic layers of the dwyka and ecca group (lower karoo supergroup) in southern namibia |
publishDate |
2006 |
url |
https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/1918 https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-21757 https://opus.bibliothek.uni-wuerzburg.de/files/1918/00-Complete_thesis-STD.pdf |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_relation |
https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/1918 urn:nbn:de:bvb:20-opus-21757 https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-21757 https://opus.bibliothek.uni-wuerzburg.de/files/1918/00-Complete_thesis-STD.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1801382259114115072 |