Assertion: sill's rock | /r/HasProperty | formed
Facets:
value: above the surface of the planet
type: LOCATION
value: from magma
type: OTHER
Source sentences:
text: These extrusive rocks are formed from magma at or above the surface of the planet, and generally display smaller mineral crystals, or no crystals at all, because of the rapid cooling environment in which they form.
text: These extrusive rocks are formed from magma at or above the surface of the planet, and generally display smaller mineral crystals, or no crystals at all, because of the rapid cooling environment in which they form.