Mount St. Helens and the other Cascade volcanoes are ________
A) a row of young, active, shield volcanoes built as western North America moved over a hot spot deep in the mantle
B) old, deeply eroded, basaltic shield volcanoes built when western North America was over the present-day site of the Hawaiian hot spot
C) old, deeply eroded stratovolcanoes built before the Pacific Ocean existed
D) young, active stratovolcanoes built on a continental margin above a sinking slab of oceanic lithosphere
D
You might also like to view...
Some geologists think that the large lava flow to the north of SP Mountain occurred before the final formation of the SP Mountain cinder cone itself. What evidence that you can see supports this conclusion? (Hint: Think about the structure, and so the relative strength, of a cinder cone.)
Look at the following volcanoes (note that the maps are of several different scales): • Mount Vsevidof (53°07'35"N, 168°41'16"W), a composite volcano in Alaska (shown on Map T-2, Map T-21b, and Figure 34-2) • Crater Mountain (37°52'42"N, 119°00'25"W), the highest peak of the Mono Craters, a chain of rhyolitic plug dome volcanoes in California (shown on Maps T-23a and T-23c) • SP Mountain (35°34'56"N, 111°37'55"W), a basaltic cinder cone in Arizona (shown on Maps T-22a and T-22b and Figure 34-3) • Mauna Loa (19°28'17"N, 155°35'41"W), a large shield volcano on the Big Island of Hawai‘i (shown on Maps T-1 and T-21a) What will be an ideal response?
Looking at Figure 9.5.5, which of the following countries has the lowest female high school graduation rates?
A) Mexico B) India C) China D) Chile E) Russia
Describe how centralized planning created a new economic geography across the former Soviet Union. What is its lasting impact?
What will be an ideal response?
Suppose a parcel of air has a given temperature, pressure, and density. Which of the following will happen to the air pressure inside the parcel if its size remains the same while its temperature increases?
A. Air pressure will decrease. B. Air pressure will decrease to, but not lower than, 1000 hPa. C. Air pressure will increase. D. Air pressure will remain constant.