metamorphic rocks

hydrothermal metamorphism

mid-ocean ridges

increasing metamorphic grade

shale -> slate -> phyllite

With increasing metamorphism, the grain size of the rock gets smaller

false statement about metamorphism of shale

presence or absence of foliation

feature which metamorphic rocks are classified

parallel alignment of mica

foliation

Metamorphism occurs

along faults, in subduction zones, and adjacent to igneous intrusions

marble

cannot form from a shale

prominent feature of regional metamorphic rocks

foliation

highest metamorphic grade

gneiss

migmatite

gradational between an igneous and metamorphic rock

subduction zones

high pressure and low temperature metamorphism

area immediately adjacent to an igneous intrusion

high temperature and low pressure metamorphism

not paired with its true parent rock

hornfels/ dolomite

marble forms from

limestone

not a consequence of increasing temperature with depth

mineral grains become smaller and smaller

mica

mineral responsible for strong foliation of schist

geologist recognize a fault zone that formed deep within the crust

presence of mylonites

quartzite

quartz-rich sandstone

Metamorphism caused by high temperature and high pressure imposed over a large volume of crust

regional

difference between stress and pressure

stress causes shape change and pressure causes volume change

The pressure and heat that drive metamorphism result from which three forces?

the internal heat of the Earth, the weight of overlying rock, and stresses developed as rocks are deformed.

rocks and minerals are exposed to high pressure

they decrease in volume