The granite plutons of the Sierra Nevada Mountains of California formed because ____
a. a continental-continental collision caused melting of the North American plate.
b. subduction of an oceanic plate beneath the North American continent produced granitic magmas that cooled
deeper in the crust.
c. the San Andreas strike-slip fault caused melting of the North American plate.
d. there was no plate boundary near western North America.
e. volcanoes spewed forth huge amounts of granite.
b
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Our weights are slightly less on the ground floor of a tall skyscraper because
A. the mass of the building attracts us slightly upward. B. shielding of gravitational forces inside the building. C. both of these D. none of the above
There are a number of ways that frauds may be carried out to try to receive excess compensation. Which of the following is not one of those methods?
A. Exaggeration of hours worked B. Falsification of overtime or holiday time worked, payable at a higher rate C. Understatement of job related expenses D. Falsification of sales in order to increase commission payouts
An igneous rock that shows a vesicular texture ________
A) contains many small holes, like Swiss cheese B) must be intrusive C) must be course grained D) appears glassy
A probable interpretation of migmatites is that they represent:
a. sequences of basalts metamorphosed at mid-oceanic ridges b. zones of low-level metamorphism of sedimentary rocks over large areas c. zones of high-level metamorphism of sedimentary rocks produced by plate collisions d. transitional zones containing mixed igneous and metamorphic rocks located between granitic batholiths and regionally metamorphosed rocks