The Tall Polygonal Features Preserved in the Ancient Basalt Flow

question 15

Multiple Choice

The tall polygonal features preserved in the ancient basalt flow in the image below formed because the lava ________.

• A)was moving as it cooled,so it fractured
• B)erupted underwater and cooled rapidly,forming many fractures
• C)was subjected to shaking from earthquakes,and subsequently fractured
• D)shrank as it cooled,forming tall polygonal-shaped fractures

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