Composite cones ____.
A) are part tephra, part caldera
B) may erupt in a pyroclastic flow
C) are composed entirely of tephra
D) are composed entirely of basalt
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Q14: Crater Lake in Oregon occupies a(n) _.
A)plug
Q15: The downtilt of a rock layer is
Q16: A sill is a _ feature.
A)volcanic
B)plutonic
C)lava
D)pyroclastic
Q17: What is the specific study of the
Q18: Explosive eruptions are associated with _.
A)low viscosity
Q20: Faults that have vertical displacement and have
Q21: Tephra is the same as _.
A)lava
B)pyroclastic material
C)mudflows
D)aa
Q22: Pahoehoe is best described as _.
A)blocky and
Q23: An increase in earthquake magnitude by one
Q24: Strike-slip faults are caused by shearing tectonic
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