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Annenkov Island Formation, Lower Tuff Member

Description

Thinly bedded tuffaceous mudstone and tuff. Fossiliferous upper section on Annenkov Island (Thomson et al., 1982)1. Highly deformed at Ducloz Head (Storey, 1983)2. Coeval minor spilitic subaqueous lavas and sills (Pettigrew, 1981)3.

Age

Late Jurassic - Early Cretaceous

Map Reference

Curtis, M. L. Geological Map of South Georgia (1:250 000 scale). Sheet 4, (British Antarctic Survey, 2011). Available here.

References

  1. Thomson, M. R. A., Tanner, P. W. G. & Rex, D. C. Fossil and radiometric evidence for ages of deposition and metamorphism of sedimentary sequences on South Georgia. Antarct. Geosci. 177–184 (1982). ↩

  2. Storey, B. C. The geology of the Ducloz Head area, South Georgia. Br. Antarct. Surv. Bull. 52, 33–46 (1983). ↩

  3. Pettigrew, T. H. The geology of Annenkov Island. Br. Antarct. Surv. Bull. 53, 213–254 (1981). ↩