Which best describes a caldera?
A) a small, steep-sided, volcanic depression bored out by an eruptive plume
B) a large circular volcanic depression caused by collapse after a large scale, explosive felsic eruption
C) a collapse pit less than 1 square kilometre on the summit of a volcano
D) a large depression hundreds of kilometres across full of volcanic deposits
Correct Answer:
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Q49: What are small basaltic cones built during
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Q53: Gas rich andesitic magmas generate composite volcanoes
Q56: What type are the volcanoes of the
Q59: What volcanoes have the highest elevations?
A)composite volcanoes
B)shield
C)cinder
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Q66: the volcanoes of southwestern Alaska and the
Q70: massive,gently sloping volcanoes built of successive,basaltic lava
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