Late Jurassic—Early Cretaceous strike-slip deformation in the Nordenskjöld Formation of Graham Land

Upper Jurassic–Lower Cretaceous anoxic mudstones and air-fall ashes of the Nordenskjöld Formation are exposed on the eastern coast of Graham Land. Deformation of the strata has a long history spanning dewatering and lithification and was probably produced in a strike-slip tectonic regime. Available evidence suggests the onset of deformation in the region was during Tithonian times. The strike-slip deformation provides further evidence of a plate boundary along the eastern margin of the peninsula during the break-up of Gondwana and the movement of the crustal blocks of West Antarctica. It may also be related to a change in the spreading history of the Weddell Sea region and be the cause of a major facies change from fine anoxic to coarse clastic sedimentation.

Details

Publication status:
Published
Author(s):
Authors: Whitham, A.G., Storey, B.C.

Date:
1 September, 1989
Journal/Source:
Antarctic Science / 1
Page(s):
269-278
Digital Object Identifier (DOI):
https://doi.org/10.1017/S0954102089000398