What is metamorphism?
What will be an ideal response?
Mineral, chemical, and textural changes to pre-existing rocks that occur in an essentially solid state (without substantial melting). This requires increased temperature and pressure. Increasing pressure and temperature increase the grade (from low-grade through medium-grade, to high-grade).
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During the colonial period, Spanish settlements reached as far north as Durango, Colorado and San Francisco, California
Indicate whether the statement is true or false
A large and fundamental division within a religion is a
A) branch. B) denomination. C) sect. D) dialect. E) family.
Diatoms flourished during the Miocene, likely because increased volcanism meant oceans were enriched in the
element ____________________, which diatoms use to build their skeletons. Fill in the blank(s) with the appropriate word(s).
Studies of past climates have shown that climate has varied only on time scales of tens of thousands to millions of years
Indicate whether the statement is true or false