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Title: Discuss how oceanic crust forms. What process generates the necessary magma? Als Post by: barry on Sep 29, 2013 Discuss how oceanic crust forms. What process generates the necessary magma? Also, be sure to discuss ophiolite sequences and discuss how the formation of each layer contributes to the formation of the crust.
Title: Re: Discuss how oceanic crust forms. What process generates the necessary magma? Als Post by: robertling on Sep 29, 2013 Magma is generated through decompression melting. This magma rises to the surface to fill in the gaps between the diverging tectonic plates. Fractures created by tension provide pathways for magma to rise and spill out on to the ocean floor, creating the pillow basalts. The fractures the basalt moved through become sheeted dikes as the magma cools. Meanwhile, the magma that remained in the magma chamber formed the gabbro bodies.
Title: Re: Discuss how oceanic crust forms. What process generates the necessary magma? Als Post by: barry on Sep 30, 2013 Content hidden
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