Aussenkjer Fm
Period:
Permian
Age Interval:
Early to Middle Permian (Artinskian to Kungurian)
Province:
SouthAfrica-Namibia-Botswana
Type Locality and Naming
Karasburg Basin, Southern Namibia, named after the Aussenkehr area along the Orange River. Upper formation in Ecca Gr in Karasburg Basin
Synonym:
Lithology and Thickness
Predominantly grey and olive-green shales, siltstones, and rhythmically interbedded fine-grained sandstones.
Lithology Pattern:
Siltstone
Relationships and Distribution
Lower contact
Conformably overlies the prominent, black, carbonaceous shales of the Whitehill Fm.
Upper contact
Conformably overlain by the marginal-marine and deltaic sandstones of the Amibberg Fm.
Regional extent
Restricted to the Karasburg Basin in southern Namibia, representing the local basin fill above the Whitehill marker horizon.
GeoJSON
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Fossils
Age
Early to Middle Permian (Artinskian to Kungurian)
Age Span:
Beginning stage:
Artinskian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
290.51
Ending stage:
Kungurian
Fraction up in the ending stage:
1.0
Ending date (Ma):
274.37
Depositional setting
Deep marine transitionally shallowing upward to prodelta environments.
Depositional pattern:
Additional Information
Compiler:
From the O. Catuneanu et al. / Journal of African Earth Sciences 43 (2005) 211–253; From the regional geological framework of the Namibian Karasburg Basin (Werner 2006; regional Karoo literature), Werner, M. (2006). The stratigraphy, sedimentology, and age of the Late Palaeozoic Mesosaurus Inland Sea, SW-Gondwana.