A magma that crystallizes by fractionation from basaltic to granitic composition would form which type of rock during the final stages of cooling?
a. dark-colored rocks high in silica
b. dark-colored rocks low in silica
c. light-colored rocks low in silica
d. light-colored rocks high in silica
d
Environmental & Atmospheric Sciences
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The average thickness of the Earth's crust is about ________ miles
A) 70 B) 55 C) 34 D) 28 E) 17
Environmental & Atmospheric Sciences
A hiatus between igneous or metamorphic rocks and sedimentary rocks is represented in the rock record by a(n) ____
A)angular unconformity B)hiatal unconformity C)nonconformity D)anticonformity E)disconformity
Environmental & Atmospheric Sciences
The permeability of an igneous rock can be increased by
A) sorting. B) cementation. C) fracturing. D) metamorphism.
Environmental & Atmospheric Sciences
The primary determiners of biomes are the amount and distribution of rainfall and the yearly temperature cycle.
Answer the following statement true (T) or false (F)
Environmental & Atmospheric Sciences