What do you mean by oceanic crust and continental crust ?? explain it with the help of diagram.
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Answer:
The continental crust is made mostly of rocks with a composition similar to granite (a light-colored rock you would expect to find in the Sierra Nevada), whereas the oceanic crust is made mostly of rocks with a composition of basalt (a dark- colored rock, like the rocks that make up the Hawaiian volcanoes).
What do you mean by oceanic crust and continental crust ?? explain it with the help of diagram.
Oceanic crust :
⏩The uppermost layer of the oceanic portion of a tectonic plate.
⏩Oceanic crust is the uppermost layer of the oceanic portion of a tectonic plate.
⏩ It is composed of the upper oceanic crust, with pillow lavas and a dike complex, and the lower oceanic crust, composed of troctolite, gabbro and ultramafic cumulates.
⏩The crust overlies the solidified and uppermost layer of the mantle.
⏩The crust and the solid mantle layer together constitute oceanic lithosphere.
Continental crust :
⏩Layer of rock that forms the continents and continental shelves.
⏩Continental crust is the layer of igneous, sedimentary, and metamorphic rocks that forms the geological continents and the areas of shallow seabed close to their shores, known as continental shelves.
⏩This layer is sometimes called sial because its bulk composition is richer in silicates and aluminium minerals and has a lower density compared to the oceanic crust, called sima which is richer in magnesium silicate minerals and is denser.