Which of the following present-day observations of crustal movement in formerly ice covered regions of North America and Eurasia support the flexural isostasy hypothesis?
A) Originally depressed areas rose to their original position by the time the ice finished melting.
B) Originally depressed areas are still rising and the bulges are stationary.
C) Originally depressed areas are still rising and the bulges are sinking.
D) Originally depressed areas are sinking and the bulges are rising.
Answer: C
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In general, how is the gradient of the present course different from the gradient of the boundary course? (In other words, is the present course steeper or less steep than the boundary course?)
The following questions are based on Map T-5, a portion of the “Jackson, Mississippi-Louisiana” topographic map (scale 1:250,000; contour interval 50 feet; dashed lines are supplementary contours at 25-foot intervals). This map shows the Mississippi River near the town of Vicksburg, Mississippi (32°49'56"N, 91°11'07"W). A color satellite image of this same region is shown in Figure 40-5 (scan the QR code for this exercise or go to the Lab Manual website and Exercise 40). The eastern bluffs of the Mississippi River floodplain can be seen in the southeast corner of the map. The dashed black line along the Mississippi River shows the state boundary between Mississippi and Louisiana. Notice that the “boundary course” of the Mississippi River is quite different from the present course of the river. Some of the changes were natural, others were artificial. There is an extensive set of artificial levees along the course of the river (shown with closely spaced brown tick marks). What will be an ideal response?
The bending or crumpling of ductile rock layers is called _______________
Fill in the blank(s) with correct word
A line connecting points of equal pressure on a weather map is called an isobar
Indicate whether the statement is true or false
Popular European revolutions of the late 18th to mid-19th centuries transformed numerous monarchies into
A) republics. B) empires. C) confederations. D) nations. E) supranational organizations.