Assertion: mineral | /r/HasProperty | formed in the earth
Facets:
value: naturally
type: MANNER
value: by meteorite impacts
type: CAUSE
Source sentences:
text: Minerals are substances that are formed naturally in the Earth.
text: The latter mineral can only be formed on Earth by meteorite impacts, and its structure has been composed so much that it had changed from a silicate structure to that of rutile (TiO 2 ).
text: Minerals are substances that are formed naturally in the Earth.