Also known as Ganigobes; Kalahari Basin; Karoo
Where: Karas, Namibia (25.8° S, 18.0° E: paleocoordinates 56.0° S, 35.8° W)
• coordinate based on nearby landmark
• hand sample-level geographic resolution
When: ? Whitehill Formation (Ecca Group), Artinskian (290.1 - 279.3 Ma)
• "Offenbar handelt es sich um den wie verfestigter Bänderton aussehenden dickbankigen hellen Schiefer, den Range (1912. p. 30 und 52) als besonders bei Keetmanshoop verbreitet und als Hangendstes seiner 'Eurydesma-Stufe' angibt und mit dieser zusammen der Ecca-Stufe zurechnet. [Apparently, this is the bright banked shale looking like banded claystone which Range (1912 p. 30 and 52) mentiones as to be particularly occuring at Keetmanshoop, and as the uppermost hanging-wall rock of his 'Eurydesma-Stage', and which he, along with the latter, assigns to the Ecca beds.]" (Stromer, 1914).
•The term "Eurydesma-Stufe" probably refers to interglacial beds of the upper part of the Dwyka Group of modern nomenclature, in which the bivalve Eurydesma is common (see, e.g. Césari, 2007, Gondwana Res. 11(4)). Thus, the beds in question can be no older than Upper Dwyka age. Oelofsen & Araujo (1987, S. Afr. J. Sci. 83) say that the occurrence of mesosaurs in southern Africa is exclusively restricted to the Whitehill Formation ("the White Band") of the Ecca Group. Thus, the present collection is tentatively assigned to the Whitehill Fm.
•Radiometric ages of the Collinson Fm. (overlying the Whitehill Fm.) vary between 270 and 275 Ma (Turner, 1999, J. Afr. Earth Sci. 28(1); Fildani et al., 2007 J. Sedim. Res. 77), and radiometric ages of the basal beds of the Prince Albert Fm. (underlying the Whitehill Fm.) vary between 293 and 285 Ma (Bangert et al., 1999, J. Afr. Earth Sci. 29(1)), implying an Artinskian age for the Whitehill Fm. (see time scales of Gradstein et al. (2004) and Ogg et al. (2008)). Radiometric dating within the Whitehill Fm. of the Khabus area (280.5 Ma; Werner, 2006, PhD thesis, http://www.opus-bayern.de/uni-wuerzburg/volltexte/2007/2175/pdf/00-Complete_thesis-STD.pdf) corroborates an assigment to the Artinskian.
• group of beds-level stratigraphic resolution
Environment/lithology: marine; gray, green shale
Size class: macrofossils
Preservation: mold/impression
Collected by Brentano-Bernarda
Collection methods: surface (float), acetic
• The fossil should be reposited in one of the collections in Munich.
Primary reference: E. Stromer. 1914. Die ersten fossilen Reptilreste aus Deutsch-Südwestafrika und ihre geologische Bedeutung. Centralblatt für Mineralogie, Geologie und Paläontologie 1914:530-541 [J. Mueller/T. Liebrecht/T. Liebrecht]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 90780: authorized by Johannes Mueller, entered by Torsten Liebrecht on 17.08.2009
Creative Commons license: CC BY (attribution)
Taxonomic list
•The collection includes one of the two specimens which were not collected on the hill of the Hauptmannshaus at Kabus.
Osteichthyes | |
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