54. Which is characteristic of pillow basalts? a. form under water b. form under high pressure c. lens-shaped masses surrounded by chilled rinds d. a and c

Question

Geography

Aiden Herman

5 September, 08:45

54. Which is characteristic of pillow basalts? a. form under water b. form under high pressure c. lens-shaped masses surrounded by chilled rinds d. a and c

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Answers (1)

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David Sexton · Answer 1

a and c

Explanation:

Basalt pillows occur when the basalt flows into the sea and the hot lava's contact with the cold sea water, the thermal shock, shapes the basalta into a rounded (pillow-like) shape, cooling the surface while a mass of Basalt is kept inside. For this reason, we can say that basalt pillows are an underwater shape, characterized as lens-shaped masses surrounded by cooled shells.