the lower oceanic crust is also called: a)core b) mantle c)sima
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B) mantle................
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Answer:The sima layer is also called the 'basal crust' or 'basal layer' because it is the lowest layer of the crust. Because the ocean floors are mainly sima, it is also sometimes called the 'oceanic crust'. ... Comparable is the name 'sial' which is the name for the upper layer of the Earth's continental crust.
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