Question

Silica and Magnesium are the main mineral constituents of the________ a. Lower Oceanic Crust b. Upper Oceanic Crust c. Inner core​

Answer 1

Answer:

inner core

Explanation:

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Answer 2

Answer:

The oceanic crust mainly consists of silica and magnesium; it is therefore called sima (si-silica and ma-magnesium) (Fig. 2.2). Just beneath the crust is the mantle which extends up to a depth of 2900 km.