The study of metamorphic rocks now exposed at the earth s surface following erosion and uplift.
The metamorphic rock formed when granite undergoes heat and poressure.
Heat necessary for metamorphism comes from magma of the earth or friction from moving tectonic plates.
Foliation is the aligning of elongated or platy minerals like hornblende or mica perpendicular to the direction of pressure that is applied.
Metamorphic rocks form from the exposure to intense heat and pressure two types of metamorphism are.
When a rock with flat or elongated minerals is put under immense pressure the minerals line up in layers creating foliation.
Metamorphic rocks are an important topic in geology.
They may be formed simply by being deep beneath the earth s surface subjected to high temperatures and the great pressure of the rock layers above it.
They are formed when igneous sedimentary or other metamorphic rocks undergo physical transformations under very great heat pressure or due to other natural agencies.
Metamorphic rocks are formed buried inside the earth s surface on being subjected to high temperatures and pressures of the rock layers above it.
Slate is another common metamorphic rock that forms from shale.
They can form from tectonic processes such as continental collisions which cause horizontal pressure friction and distortion.
Sedimentary form as a result of cementation and compaction.
Both can form from the other type.
They are also formed when rock is heated by the intrusion of hot molten rock called magma from the earth s interior.
The granitic rock in migmatite probably originated from partial melting of some of the metamorphic rock though in some migmatites the granite may have intruded the rock from deeper in the crust.
Metamorphic rocks change when exposed to even more heat and pressure.
Metamorphic rocks have two classes.
They differ in the way they form.
1 regional metamorphism which affects a large area.
Both formed as a result of the rock cycle.
Some form during mountain building by forces of others from the heat of igneous intrusions in regional metamorphism others from the heat of igneous intrusions in contact metamorphism.
Metamorphic rocks metamorphic rocks are rocks that have been changed from their original form by immense heat or pressure.
These are the rocks that form by the effects of heat pressure and shear upon igneous and sedimentary rocks.
Limestone a sedimentary rock will change into the metamorphic rock marble if the right conditions are met.
Marble marble is a metamorphic rock made up of granular limestone or dolomite i e rock composed of calcium magnesium carbonate that has been recrystallized under the influence of heat pressure and aqueous solutions.
When granite is subjected to intense heat and pressure it changes into a metamorphic rock called gneiss.
