The primary cause of change in regional metamorphism is pressure. Usually rocks subjected to high pressures at considerable depth within the earth's crust will exhibit regional metamorphism like the widespread phyllites, schists, gneisses and migmatites of the Canadian Precambrian Shield for example. A phyllite is the next higher metamorphic stage than a slate, a schist is a further stage and gneiss and migmatites are of the highest grade of regional metamorphism. On the other hand, contact metamorphism usually depends more on the effect of heat from an igneous intrusion say converting a limestone to a marble (more coarse grained than limestone usually).
Answer:
hiya!
Explanation:
During the colonial era, Mexico's indigenous culture mixed with European culture, producing a hybrid culture highlighted in the local use of language: the country is both the most populous Spanish -speaking country in the world and home to the largest number of Native American language speakers in North America.
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Answer:
the letter goes destroy greece. the end.
Explanation:
A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle. ... This is the picture taken by the Hubble Space Telescope showing thousands of galaxies.
spain is the only nation that does not poossess nuclear weapons.