A possible "driving force" for plate motions is
A. the weight of subducted continents pulling downward.
B. convection in the asthenosphere.
C. shifts in the earth's magnetic field.
D. volcanic eruption at hot spots.
Answer: B
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Do all of the terraces shown on your topographic profile extend, without interruption, to the southeast and northwest along this side of the island?
The following questions are based on Figure 49-8, a portion of the “San Clemente Island Central, California” quadrangle shown on the following page (scale 1:24,000; contour interval 25 feet; index contours drawn every fourth line; to view this map in color, go to the Lab Manual website or scan the QR code for this exercise), and the stereogram of San Clemente Island (Figure 49-7). The map and stereogram show a series of marine terraces on San Clemente Island in southern California (32°51"08"N, 118°29'58"W). The terraces have been incised by streams in several places.
Figure 49-8: USGS “San Clemente Island Central, California” quadrangle (scale 1:24,000; contour interval 25 feet; note that the index contours on this map have been drawn every fourth line;cN)
The first evidence of shelled organisms is calcareous tubes found with the Ediacaran fauna
a. True b. False
What causes a tsunami? Compare the losses due to the Indonesian (2004) and Japan (2011)
earthquakes. How could the loss of life and property have been minimized? What will be an ideal response?
The Gobi Desert in Asia is created by ________.
A. the rain shadow effect of the Himalayas B. being a great distance from the ocean C. descending dry air D. both being a great distance from the ocean and by the rain shadow effect E. both dry descending air and being a great distance from the ocean