Where does basalt form

25 Mar 15 - 12:48

Where does basalt form

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Nov 1, 2005 - 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

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It forms from the melting of the upper mantle and its chemistry closely resembles If basaltic magma does not solidify on the surface of the Earth, but cools in its They form from low effusion-rate eruptions of fluid basalt lava. If lava cools slowly and does not move too fast it forms smooth ropy lava called pahoehoe.What Is Basalt, How Does It Form and How Is It Used? What is Basalt? Basalt is a dark-colored, fine-grained, igneous rock composed mainly of plagioclase and Basalt magmas form by decompression melting of peridotite in the Earth's mantle, Did a Volcanic Cataclysm 40,000 Years Ago Trigger the Final Demise of the

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Basalt forms when mantle rocks (peridotite) start to melt. are plagioclase phenocrysts but they contain less Ca and more Na than plagioclase in basalt does. Basalt has a key role in Earth's tectonic cycle. olives yield oil when put under pressure, midocean-ridge basalt forms when pressure on the mantle is released. Basalt is a fine-grained, hard rock that forms when bits of lava shoot out of volcanoes, so it's one kind of igneous rock. When the lava cools quickly, it turns into

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