Assertion: cone volcano | /r/CapableOf | dot virginia
Facets:
value: for a million years
type: TEMPORAL
Source sentences:
text: In fact the argon dates suggested that roughly 50 million years ago in the Eocene—when a warmer world of forests stretched from pole to pole and the ancestors of mammals such as bats, elephants and primates first evolved—cinder cone volcanoes dotted Virginia for a million years or two.