metamorphism

/met-uh-mawr-fiz-uhm/US // ˌmɛt əˈmɔr fɪz əm //UK // (ˌmɛtəˈmɔːfɪzəm) //

变质作用,变质岩,变质现象,变质论

Definitions

n.名词 noun

1
- : Geology. a change in the structure or constitution of a rock due to natural agencies, as pressure and heat, especially when the rock becomes harder and more completely crystalline.
- : Archaic. metamorphosis.

The Weverton sandstone has suffered less from metamorphism than any of the sediments.
The metamorphism of the igneous rocks is regional in nature and has the same increase from west to east as the sediments.
Some further remarks upon the subject will be found in the sequel under the heading of Metamorphism.
Often no granite or other intrusive rock is present which may be regarded as the cause of the metamorphism.
More than one epoch of metamorphism has perhaps occurred, and the entire record now accessible is exceedingly complicated.