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Magmas (and lava) exist in/on the Earth's crust as a result of all these processes except: decreased pressure in rising mantle hot-spots allows partial melting at lower temperatures upward migration of water and other volatiles from subducting slabs causes partial melting of upper mantle and crust the upper mantle is entirely molten, but magma can rise into the crust only along extensional tectonic boundaries decreased pressure in rising mantle under mid-ocean ridges allows partial melting at lower temperatures transfer of heat from existing magma can partly melt adjacent rocks with lower melting temperatures

Magmas (and lava) exist in/on the Earth's crust as a result of all these processes except: decreased pressure in rising mantle hot-spots allows partial melting at lower temperatures upward migration of water and other volatiles from subducting slabs causes partial melting of upper mantle and crust the upper mantle is entirely molten, but magma can rise into the crust only along extensional tectonic boundaries decreased pressure in rising mantle under mid-ocean ridges allows partial melting at lower temperatures transfer of heat from existing magma can partly melt adjacent rocks with lower melting temperatures

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Magmas (and lava) exist in/on the Earth's crust as a result of all these processes except: decreased pressure in rising mantle hot-spots allows partial melting at lower temperatures upward migration of water and other volatiles from subducting slabs causes partial melting of upper mantle and crust the upper mantle is entirely molten, but magma can rise into the crust only along extensional tectonic boundaries decreased pressure in rising mantle under mid-ocean ridges allows partial melting at lower temperatures transfer of heat from existing magma can partly melt adjacent rocks with lower melting temperatures
Transcribed Image Text:Magmas (and lava) exist in/on the Earth's crust as a result of all these processes except: decreased pressure in rising mantle hot-spots allows partial melting at lower temperatures upward migration of water and other volatiles from subducting slabs causes partial melting of upper mantle and crust the upper mantle is entirely molten, but magma can rise into the crust only along extensional tectonic boundaries decreased pressure in rising mantle under mid-ocean ridges allows partial melting at lower temperatures transfer of heat from existing magma can partly melt adjacent rocks with lower melting temperatures
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