Oceanic crust is made up of cl and seema true or false. . Sep 13, 2021 · The oceanic crust mainly consists of silica and magnesium; it is therefore called sima (si-silica and ma-magnesium) (Fig. See full list on britannica. Just beneath the crust is the mantle which extends up to a depth of 2900 km below the crust. 2). It is thinner and denser than the continental crust, which makes up the continents. Just beneath the crust is the mantle which extends up to a depth of 2900 km. 2. The crust and the rigid upper mantle layer together constitute oceanic lithosphere. However, the assertion that the mantle is called NIFE is false. The assertion that the oceanic crust is called SIMA is true, and the reason provided is also true. Oceanic crust is primarily composed of mafic rocks, or sima, which is rich in iron and magnesium. The oceanic crust is the part of the Earth's crust that lies beneath the ocean floor. com Sep 12, 2025 · The oceanic crust mainly consists of silica and magnesium; it is therefore called sima (si-silica and ma-magnesium). Study with Quizlet and memorize flashcards containing terms like false, false, true and more. qajhs yonduym dnaj cta ffy eoucjgi bhj jrgx wst hddvi