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Grillental (Miocene of Namibia)

Also known as Sperrgebiet

Where: Karas, Namibia (27.0° S, 15.3° E: paleocoordinates 27.9° S, 12.8° E)

• coordinate stated in text

• local area-level geographic resolution

When: Elisabeth Bay Formation, Early/Lower Miocene (23.0 - 16.0 Ma)

• The fossiliferous beds were assigned to the Elisabeth Bay Formation by Greenman (1966, unpubl. MSc thesis) but this unit, as originally defined, is penetrated by a major unconformity comprising a hiatus of about 15 Ma (Pickford & Senut, 1999, p. 61 & 76). The name Elisabeth Bay Formation here refers only to the lower, fluvial part of the series which is of Lower Miocene age (Pickford & Senut, 1999, p. 76).

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; siliciclastic sediments

• The Miocene sediments of the Grillental localities have been deposited in an incised valley that was cut into the pre-Miocene bedrock of the Namib Coastal Plain during the late Oligocene or earliest Miocene, "when the sea level was appreciably lower than it is today." Incised valley and Miocene deposits represent the so-called Proto-Kaukausib drainage system (Pickford & Senut, 1999, fig. 4-2/p. 62).

Size classes: macrofossils, mesofossils

Collected by M. Pickford and B. Senut in the 1990s, 2000s

• The squamate material listed by Rage (2008) was collected by Martin Pickford and Brigitte Senut in the course of the Namibia Paleontology Expedition (NPE) in the 1990s and 2000s and is reposited in the Geological Survey of Namibia in Windhoek.

Primary reference: J.-C. Rage. 2008. Squamate reptiles from the Lower Miocene of the Sperrgebiet, Namibia. In M. Pickford and B. Senut (eds.), Geology and palaeobiology of the northern Sperrgebiet, Namibia. Memoir of the Geological Survey of Namibia (Ministry of Mines and Energy, Windhoek) 20:93-103 [J. Mueller/T. Liebrecht] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 168036: authorized by Johannes Mueller, entered by Torsten Liebrecht on 13.04.2015, edited by Richard Butler and Evangelos Vlachos

Creative Commons license: CC BY (attribution)