a sedimentary rock that was formed by organisms or contains the remains of organisms
biochemical rock
sedimentary rocks that are made up of broken pieces of minerals and rock fragments
clastic rocks
contain parallel layers of flat and elongated minerals
foliated rocks
igneous rocks that form as magma cools underground
intrusive rocks
molten or liquid rock underground
magma
any process that affects the structure or composition of a rock in a solid state as a result of changes in temperature, pressure, or the addition of chemical fluids
metamorphism
rock that forms when lava cools too quickly to form crystals
volcanic glass
minerals dissolved in water crystallize between sediment grains
