Assertion: volcano's eruption | /r/CapableOf | form mammoth mountain
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Source sentences:
text: Repeated eruption of dacite and rhyodacite from vents on the southwest rim of the caldera from 220,000 to 50,000 years ago formed Mammoth Mountain, a volcano composed of overlapping lava domes.:277 Eruptions of dacite and rhyodacite occurred in Mono Basin from 100,000 to 6,000 years ago.