The occurrence of Mesozoic oceanic floor and ancient continental crust on South Georgia
- 1 January 1977
- journal article
- research article
- Published by Cambridge University Press (CUP) in Geological Magazine
- Vol. 114 (3) , 203-208
- https://doi.org/10.1017/s0016756800044770
Abstract
Summary: The Larsen Harbour Formation of southern South Georgia is part of an ophiolite sequence of submarine lavas and sheeted dykes emplaced into metasedimentary country rocks. The metasediments are remnants of a pre-Cretaceous continental crust which had been subject to regional metamorphism and polyphase deformation prior to intrusion by a variety of acid and basic igneous rocks (roots of the ophiolitic sequence). It is proposed that the segment of continental crust and the Larsen Harbour Formation formed the floor of a back-arc basin which was infilled during Early Cretaceous time by a thick sequence of volcaniclastic sediments (Cumberland Bay Formation).Keywords
This publication has 5 references indexed in Scilit:
- An Upper Mesozoic island-arc–back-arc system in the southern Andes and South GeorgiaGeological Magazine, 1976
- Tectonic Relations of South Georgia Island to the Southernmost AndesGSA Bulletin, 1975
- Fossil marginal basin in the southern AndesNature, 1974
- A Discussion on volcanism and the structure of the Earth - The evolution of the Scotia Ridge and Scotia SeaPhilosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1972
- Evolution of the Scotia ArcNature, 1971