Assertion: volcano's eruption | /r/AtLocation | chaos crags
Facets:
value: during this period
type: TEMPORAL
Source sentences:
text: During this period, eruptions in the Lassen region have occurred at sites including Lassen Peak, Chaos Crags, and Sunflower Flat (explosive dacite eruptions followed by dome growth) and Tumble Buttes, Hat Mountain, and Prospect Peak (basalt eruptions).