Question

खडीय कवच हे सिलिका व मॅग्नेशियम यांचे बनले आहे.
question and answer​

Answer 1

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.