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Larson Harbour Complex

Description

Predominantly tholeiitic pillow basalts (Larson Harbour Formation) associated with hyloclastite, pillow breccias, plus rare tuff and chert units. Minor component of silicic lavas, dykes and small intrusions. Mafic dykes form up to 80% of the lower part of the volcanic stratigraphy. Structural depth of exposure increases from north to south (Mair, 1987)1.

Age

Middle - Late Jurassic

Map Reference

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

References

  1. Mair, B. F. The Geology of South Georgia: VI. Larsen Harbour Formation. Br. Antarct. Surv. Sci. Rep. 111, 60pp (1987). ↩