The thickness of the crust on the ocean floors is 5-10 km.
- Oceanic current is around 6 km thick.
- Oceanic crust is the topmost layer of the oceanic part of a tectonic plate.
- Upper oceanic crust consists of pillow lavas and dike complex.
- Lower oceanic crust consists of troctolite, gabbro, and ultramafic cumulates.