Earth's Interior: Core, Mantle, Crust - Structure & Composition

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Earth's Interior: Detailed view
Outermost solid layer of Earth, with a thickness of 30-50 km.
In the Himalayan region, the continental crust is 70-100 km thick.
- Continental Crust
Oceanic crust: 5-30 km thick, thinner than the continental crust (50-70 km thick).
- Oceanic crust
Comprises 0.5-1.0% of Earth's volume.
Outer layer is sedimentary material with underlying crystalline, igneous, and metamorphic rocks.
Lower crust consists of basaltic and ultra-basic rocks.
- basaltic and ultra-basic rocks
Density of outer crust: 2.8 g/cm³, lower crust: 3.0 g/cm³.
Continents composed of silica + aluminum (sial); oceans composed of silica + magnesium (sima).
Mohorovicic (Moho) Discontinuity separates the crust from the mantle.