Continental rifting is occurring today in ________
A) western California (San Andreas Fault)
B) between Minnesota and Wisconsin (mid-continent rift)
C) the Pacific Northwest (Cascadia subduction zone)
D) Ethiopia and Kenya (East African Rift valley)
Answer: D
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Which of the following is a stochastic interpolation method?
A. thin-plate splines B. Thiessen polygons C. kriging D. inverse distance weighted E. none of these is correct
Human impact on desert areas is mainly due to which one of the following factors?
A. roads and highways B. introduction of alien species C. transport of water to deserts D. None of these statements correct.
Flood basalt eruptions are fed by
A) long fissures/dikes. B) lava tubes. C) central vents/craters.
Mass extinctions occurred at the end of the ____
a. Cambrian, Devonian, and Mississippian b. Ordovician, Silurian, and Devonian c. Ordovician, Devonian, and Permian d. Silurian, Devonian, and Permian e. Cambrian, Devonian, and Permian