Assertion: caldera | /r/CapableOf | form explosive eruptions
Facets:
Source sentences:
text: Before the last caldera forming eruption about 640,000 years ago, there were at least 6 earlier caldera forming explosive eruptions.
text: Initially it was assumed that the caldera formed right after this eruption, about 310 thousand years ago; however, more recent studies suggest that the collapse happened with the next eruption, about 270 thousand years ago.