Where does metamorphism take place?
What will be an ideal response?
Answer: The three primary types of metamorphism are contact, hydrothermal, and regional. Contact metamorphism occurs along igneous intrusions. It is local metamorphism with reactions driven primarily by heat. Contact metamorphism is most intense closest to the magma and decreases away from the intrusion. Hydrothermal metamorphism on a local scale involves hot fluids, derived from intruding igneous bodies or infiltrating ground water, which circulate through the rock. This type of metamorphism occurs on a large scale at divergent plate boundaries, where large volumes of circulating hot seawater promote metamorphism and ore production. Regional metamorphism depends on temperature and pressure increases that occur over very large volumes of crust and produces extensive tracts of foliated rocks. It typically occurs near convergent plate boundaries.
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Discuss briefly the economic and social justice issues that can arise from some mining operations
What will be an ideal response?
High or low tidal currents that change direction result in ____
a. tidal water b. flood water c. slack water d. shallow water e. ebb water
What are the two sources of energy that drives the earth's processes?
What will be an ideal response?
The lowest level to which a stream can erode is its
A. base level. B. bedrock. C. sediment capacity. D. headwaters.