igneous rocks Flashcards
what are igneous rocks?
rock type that forms when molten material solidifies
a method to classify igneous rocks is environment of formation which is..?
location where liquid rock solidifies into solid rock
what is magma?
molten rock that is deep inside the earth
what is plutonic?
rock formed deep within earth
what is intrusive?
below earth’s crust
what is lava?
molten rock that’s outside of earth
what is volcanic?
rock formed above earth’s surface
what is extrusive?
above earth’s crust
the longer the cooling time=..
larger the crystal size[coarse/very coarse]
the shorter the cooling time=..
smaller the crystal size[glassy/fine]
coarse grained is also called..
intergrown crystals
what is vesicular?
contains gas pockets[many holes]
what is composition?
mixture of minerals that make up an igneous rock
what is mineral composition?
the minerals & approximate percentages found in rock
