Assertion: collision | /r/CapableOf | escape earth's gravity
Facets:
value: analysis based
type: OTHER
Source sentences:
text: Collisions between ejecta escaping Earth's gravity and asteroids would have left impact heating signatures in stony meteorites; analysis based on assuming the existence of this effect has been used to date the impact event to 4.47 billion years ago, in agreement with the date obtained by other means.