Augite-hypersthene andesite is the dominant rock type.
2.
After the cone was eroded, a series of hypersthene andesite lava flows were erupted between 0.17 and 0.21 million years ago.
3.
Renewed volcanism between 210, 000 and 170, 000 years ago produced hypersthene andesite lava flows, which locally terminate with precipitous } } thick ice-contact margins.
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