ELS (rock form) Flashcards
begin as magma
igneous rock
when rock is heated, pressure is released, rock changes composition.
magma can form
magma can form
when rock is heated, pressure is released, rock changes composition.
a mixture of any minerals
magma
magma freezes between
700 c and 1,250 c
light colored rocks that are rich in elements such as aluminum, potassium, silicon and sodium
felsic
dark colored rocks that are rich in calcium, iron, and magnisium, poor in silicon
mafic
mafic
poor in silicon
takes longer to cool, giving mineral crystals more time to grow
coarse-grained
cools quickly
fine-grained
gabbro, basalt
mafic
granite, rhyolite
felsic
magma pushes into surroundings rock below the earth’s surface
intrusive rocksf
forms when magma erupts onto earths sruface, cools quickly or no crystals formed
extrusive rocks
high pressure and temeperature turn the solid into liquid
igneous rock