2007-10-31 01:23:49 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
Metamorphic Rocks
The metamorphics get their name from "meta" (change) and "morph" (form). Any rock can become a metamorphic rock. All that is required is for the rock to be moved into an environment in which the minerals which make up the rock become unstable and out of equilibrium with the new environmental conditions. In most cases, this involves burial which leads to a rise in temperature and pressure. The metamorphic changes in the minerals always move in a direction designed to restore equilibrium. Common metamorphic rocks include slate, schist, gneiss, and marble.
Click here for more on metamorphic processes and rocks (RCC).
Click here for more on metamorphic rocks (GPHS).
OBVIOUSLY FROM THE ABOVE, METAMORPHISM WILL OCCUR WHEN SUBDUCTION IS TAKING PLACE DUE TO THE INCREASE IN HEAT AND PRESSURE.
2007-10-31 04:58:44 · answer #1 · answered by Loren S 7 · 0⤊ 2⤋
Subduction, most likley.
Subduction is the process in which the rim of one plate slides under another plate. As the plate sinks deeper into the earth, heat and pressure can change the physical characteristics of the buried material. For example, limestone is a sedimentary rock which is changed to marble through a metamorphic process.
2007-10-31 08:44:27 · answer #2 · answered by Roger S 7 · 1⤊ 1⤋
Metamorphism occurs at contacts in which pressure and/or heat changes the property of the rock(s). This generally occurs at subduction zones where one plate travels beneath another.
2007-10-31 15:12:06 · answer #3 · answered by bdempseyjr 2 · 0⤊ 1⤋
the one that moves
2007-10-31 08:32:47 · answer #4 · answered by jim m 7 · 0⤊ 1⤋