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Andesite Intrusives, South Georgia

Description

Porphyritic andesite sills and irregular intrusions in Upper Breccia Member. Small quartz diorite and microdiorite intrusions on Hauge Reef and Pickersgill Islands (Pettigrew, 1981)1.

Age

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