Description
Rhyolitic ignimbrites, crystal- and crystal-lithic-tuffs, up to 400 m in thickness. Outcrop extent is restricted to Reptile Ridge, Webb Island, Killingbeck Island and Piñero Island. Eruption age of 67.6 ± 0.6 Ma (Riley et al., 20121).
Age
Latest Cretaceous (67.6 ±0.6 Ma)
Map Reference
Riley, T. R., Flowerdew, M. J. & Haselwimmer, C. E. Geological Map of Adelaide Island, Graham Land (1:200 000 scale). Sheet 2, (British Antarctic Survey, 2011). Available here.
References
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Riley, T. R., Flowerdew, M. J. & Whitehouse, M. J. Chrono-and lithostratigraphy of a Mesozoic–Tertiary fore-to intra-arc basin: Adelaide Island, Antarctic Peninsula. Geol. Mag. 149, 768–782 (2012). ↩