Cinder cones are formed when ____
a. ?seawater leaches into the magma plume of a stratovolcano
b. ?low-viscosity basalt encounters groundwater near the surface
c. ?a magma chamber collapses, building magma pressure
d. ?a volcanic eruption creates large amounts of ash
e. ?high-viscosity rhyolite interacts with surface soil
ANSWER: b
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____________________ are distinct layers in well-developed soils
Fill in the blank(s) with correct word
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