How Basalt is formed
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Basalt forms when lava reaches the Earth's surface at a volcano or mid ocean ridge. The lava is between 1100 to 1250° C when it gets to the surface. It cools quickly, within a few days or a couple weeks, forming solid rock. ... The 'ropes' form when the surface cools, becoming solid rock while lava flows beneath it.
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Updated: 2019/10/18
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