Assertion: mastodon's population | /r/CapableOf | persist into the holocene
Facets:
value: in northwestern north america
type: LOCATION
value: well
type: OTHER
Source sentences:
text: Archaeologists in Alaska recently discovered horse remains with DNA material that dated to 7,600 years before present, showing that “small populations of these megafaunal species persisted well into the Holocene [the current geological epoch] in northwestern North America.