Why would geologic mapping be difficult in an area dominated by accreted terranes?
A) The geology is so similar that it would be difficult to determine terrane boundaries
B) Each terrane is geologically distinct, but also highly deformed
C) Isostatic rebound would result in gravitational collapse to make them indistinct
D) Terranes are very old and terribly eroded
Answer: B
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A. 1/2, 3/2, 1 B. 1, 2, 3 C. 1, 3, 2 D. 2, 6, 4 E. 3, 2, 1
Terranes refer to
A) fragmented crustal material from one plate and accreted to another plate. B) a large region where a craton is exposed at the surface. C) subducted oceanic crust that is melted and later reaches the surface in volcanic eruptions or cools in the subsurface as an intrusive body. D) the topography of a tract of land.
Most Atlantic tropical cyclones have their origin in
A. the Caribbean. B. the Gulf of Mexico. C. the middle of the Atlantic Ocean. D. northwest Africa.
Thinking of a glacier as a dynamic equilibrium, the input is ______ and the output is _____________.
Fill in the blank(s) with the appropriate word(s).