A ________ is a volcanic depression much larger than the original crater, formed when the volcano collapses into a vacated magma chamber.
A. caldera
B. vent
C. ring dike
D. basin
E. crater
Answer: A
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Which type of ore deposit originated before there was free oxygen in the atmosphere?
a. banded iron formation b. manganese nodules c. colcanogenic copper d. gold placer deposits e. bauxite
The angle of the subducted slab during the Laramide orogeny was ____
A)very steep resulting in volcanism near the trench B)very shallow resulting in volcanism near the trench C)very steep causing deformation far inland D)very shallow causing deformation far inland E)almost vertical
The path that Northern Hemisphere cyclonic storms follow (storm track) is usually farther to the south during:
A) winter. B) nighttime. C) summer. D) autumn.
The upper half of the ________ zone is the only place in the ocean where there is sufficient light to support photosynthesis
A) abyssopelagic B) bathypelagic C) epipelagic D) mesopelagic E) nektopelagic