Circular Geomorphic Features: Roter Kamm and Gross Brukkaros
Roter Kamm and Gross Brukkaros are two circular structures which at first sight might appear to have a similar origin. This is not the case. Roter Kamm, which lies in the Sperrgebiet, developed in 1,200 million year old Precambrian granitic rocks as a result of meteorite impact in the Pliocene c 3.7–5 million years ago. Gross Brukkaros is an impressive and isolated hill near Berseba, whose formation began towards the end of the Cretaceous c 75 million years ago. It started with the intrusion of carbonatite-rich magma into the Nama sediments that then covered this part of Namibia. The Brukkaros inselberg has since been brought into landscape prominence by downwearing of the surrounding surface.
KeywordsAeolian Sand Circular Structure Meteorite Impact Crater Floor Volcanic Explosion
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