Scoira with inclusions ; Volcanic bomb from the 2017-2018 tuff ring; Scoria (15-50+% vesicularity) with dark gray-black mostly crystalline groundmass and 1% hornblende to 2 mm, 3% plagioclase to 2 mm. Fine-grained rounded inclusions of plagioclase/hornble
Petrology of the 2016-2017 eruption of Bogoslof Island, Alaska
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