Assertion: meteorite's iron | /r/CapableOf | cool over a period of millions of years
Facets:
value: very slowly
type: DEGREE
Source sentences:
text: This liquid metal consisted largely of iron and nickel, which cooled very slowly over a period of millions of years, resulting in the formation of a crystalline alloy structure visible as the Widmanstätten Pattern [see below] in iron, and some stony-iron, meteorites that have been sectioned and etched.