Mawson Formation
Geological formation in Antarctica / From Wikipedia, the free encyclopedia
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The Mawson Formation is a geological formation in Antarctica, dating to roughly between 182 and 177 million years ago and covering the Toarcian stages of the Jurassic Period in the Mesozoic Era.[2][3] Vertebrate remains are known from the formation.[4] The Mawson Formation is the South Victoria Land equivalent of the Karoo Large Igneous Province in South Africa (including the upper Clarens Formation desertic interbeds), as well the Lonco Trapial Formation and the Cañadón Asfalto Formation of Argentina.[1] The Volcanic material was likely sourced from the Antarctic Peninsula´s Ellsworth Land Volcanic Group.[5]
Quick Facts Type, Unit of ...
Mawson Formation | |
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Stratigraphic range: Toarcian ~182–177 Ma | |
Type | Geological formation |
Unit of | Ferrar Large Igneous Province |
Sub-units | Carapace Sandstone Member[1] |
Underlies | Kirkpatrick Basalt (In part) |
Overlies | Lashly Formation |
Area | 28.5 km² |
Thickness | Up to 400 m |
Lithology | |
Primary | Volcaniclastic mudstone |
Other | Volcaniclastic gray & blue mudstone |
Location | |
Coordinates | 76.9°S 159.4°E / -76.9; 159.4 |
Approximate paleocoordinates | 60.1°S 46.5°E / -60.1; 46.5 |
Region | South Victoria Land |
Country | Antarctica |
Extent | Unknown |
Type section | |
Named for | Mawson Peak |
Named by | Ballance and Watters, 1971[2] |
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