Metamorphic rock

Metamorphic rock is the result of the transformation of an existing rock type, the protolith, in a process called metamorphism, which means "change in form"....
s, such as contact aureoles surrounding cooled intrusive igneous rock
Igneous rock ...

Metamorphic rock
a rock that has been heated and compressed so that it recrystallizes, but does not melt.
Meteor
a small particle of rock or dust that burns away in the Earth's atmosphere. Meteors are also referred to as shooting stars.

Metamorphic rocks are compacted by pressure and heat from deep inside the earth.

METAMORPHIC ROCK
Metamorphic rocks are compacted by pressure and heat from deep inside the earth.

metamorphic rocks (NASA Thesaurus) Rocks derived from pre-existing rocks by mineralogical, chemical and/or structural changes, essentially in the solid state.

cataclastic A texture found in metamorphic rocks in which brittle minerals have been broken, crushed and flattened during shearing. catena A chain of craters. cavus Hollows, irregular depressions.

Alkali amphibole occurs primarily in sodic-metamorphic rocks and in alkaline igneous rocks. Alkali amphiboles are divided into two groups based upon M4 and A site occupancies. If the M4 site contains <0.

a common mineral in some metamorphic rocks, composed mainly of calcium and magnesium; it occurs from the conversion of dolomite (a sedimentary rock), silica, and water
trillion
1,000,000,000,000 (in American usage) ...

The third form of rock material found on Earth is metamorphic rock, which is created from the transformation of pre-existing rock types through high pressures, high temperatures, or both.

See also: Earth, Rock, Period, Mineral, Second