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hypersthene-andesite; with oscillatory-zoned plagioclase phenocrysts, clinopyroxene and minor olivine.

Crater Lake, Oregon, USA lava:?Tertiary: MANU HERRIOT, Alex late C20th East Kilbride Scotland Slide number AH:5587 from the collection bequeathed by Alex Herriot of East Kilbride, in 1998.