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Mapple Formation and Kenney Glacier Formation

Description

Subaerial rhyolitic ignimbrites, crystal-, lithic-, vitric-, lapilli-tuffs and rare pitchstone lava flows. At least 1km thick, exposed extensively along the east coast. Dated in the interval 167-173 Ma1. Interbedded with Botany Bay Group (3) at the base of the succession.

Age

Middle Jurassic, 167-173 Ma1

Map Reference

Riley, T. R., Flowerdew, M. J. & Haselwimmer, C. E. Geological Map of Eastern Graham Land, Antarctic Peninsula (1:625 000 scale). Sheet 1, (British Antarctic Survey, 2011). Available here.

References

  1. Pankhurst, R. J., Riley, T. R., Fanning, C. M. & Kelley, S. P. Episodic silicic volcanism in Patagonia and the Antarctic Peninsula: chronology of magmatism associated with the break-up of Gondwana. J. Petrol. 41, 605–625 (2000). ↩ ↩2