Encyclopedia > Metamorphic rock

Article Content

Metamorphic rock

Metamorphic rock consists of minerals which were originally sedimentary rock or igneous rock and which have been chemically altered by heat, pressure or the introduction of other chemical substances, but which have not been remelted. This process is called metamorphism or metamorphosis.

Metamorphic rocks are sometimes revealed when plates collide (see obduction and subduction) and mountains are created.

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

Disjunctive syllogism

... to be one or the other that is true; then we are told that it is not the one that is true; so we infer that it has to be the other that is true. The reason this is called ...