Sedimentary Rocks of the English Coast, Eastern Ellsworth Land, Antarctica
- Garry D. Mckenzie
Published Online: 21 MAR 2013
Copyright 1987 by the American Geophysical Union.
Gondwana Six: Structure, Tectonics, and Geophysics
How to Cite
Laudon, T. S., Lidke, D. J., Delevoryas, T. and Gee, C. T. (1987) Sedimentary Rocks of the English Coast, Eastern Ellsworth Land, Antarctica, in Gondwana Six: Structure, Tectonics, and Geophysics (ed G. D. Mckenzie), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM040p0183
- Published Online: 21 MAR 2013
- Published Print: 1 JAN 1987
Print ISBN: 9780875900643
Online ISBN: 9781118664483
Nunataks scattered over 16,000 km2 of the western English Coast along the Bellingshausen Sea are the westernmost rock exposures of the Antarctic Peninsula tectonic province. The nunataks are composed of sedimentary rocks of probable Paleozoic, Mesozoic, and probable Mesozoic age, volcanic and plutonic rocks of probable Mesozoic age, and basaltic volcanic and volcaniclastic rocks of probable late Cenozoic age. Most rocks exposed on the English Coast are correlatable with Mesozoic and Cenozoic units which occur in the Orville Coast and the Lassiter Coast regions to the east. One outcrop in the English Coast consists of sedimentary rocks containing fossil plants including abundant Glossopteris leaves and fragments of Phyllotheca and Equisetum. The age of the rocks is probably Permian, significantly older than the oldest previously dated rocks (Middle Jurassic) from the southern Antarctic Peninsula. This is the first reported occurrence of Glossopteris from the Antarctic Peninsula province and the second reported occurrence from West Antarctica. Permian(?) sedimentary rocks suggest that the English Coast was probably near the Pacific Coast of Gondwana. Sandstone, shale, and conglomerate at several other localities in the English Coast are correlated with the Jurassic Latady Formation of the Orville Coast. Sedimentary rocks of unknown age at two other nunataks include metamorphosed quartz-sandstone and cross-bedded sandstone.