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___ is becoming a serious problem as demand for drinking water increases in coastal cities.
Q4: Support is growing for the idea that
Q4: Thick deposits of sediment called _ are
Q4: Mineralogically and chemically equivalent rocks are _
Q11: Among techniques used to prevent rockfalls along
Q13: Tillite is lithified till.
Q29: Pegmatites are extremely coarse-grained igneous rocks.
Q36: The _ horizon is the uppermost layer
Q40: _ is metamorphism coupled with the introduction
Q47: _ dating uses the effect of neutron
Q53: A debris flow is a very rapidly