Multiple Choice
Columnar joints form when ________.
A) a lava flow cools very rapidly,causing the flow to shatter in a chaotic pattern
B) a lava flow encounters groundwater,which causes the flow to rapidly fracture
C) a lava flow erupts under deep water
D) during the final stages of cooling,a lava flow contracts,forming tall polygonal fractures
Correct Answer:
Verified
Correct Answer:
Verified
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