Geology of Northern Evans Névé, Victoria Land, Antarctica

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Abstract
Geological examination of previously unmapped parts of the Northern Evans Névé,and detailed re-examinationof other outcrops in the are, form the basis for a revised geological map.Sedimentary rocks (Robertson Bay and Bowers Group) and intrusives (Admiralty Intrusive Group, Ferrar Group and basic dikes of unknown affinity)are described. They range in age from Late Preccambrian to Jurassic. A new radiometric date of 330 m.y. on granodiorite exposed in the Southern Salamander range confirms that the pluton forms part of the Admiralty Intrusives. A detailed examination was carried out on the Camp Ridge Quartzite (Bowers Group) which was widely exposed in the area.The upper part of the formation was deposited by a river flowing to the north-west or north-north-west.The trace fossil assemblage in the lower part suggests that it formed the marine portion of a delta.