The type of crust that underlies the ocean basins. It is generally less than 8 km thick, composed predominantly of basalt and gabbro. Its density is about 3.0 g/cm3. The velocities of compressional seismic waves traveling through it exceed 6.2 km/sec. Compare with continental crust.
Basaltic portion of the Earth's crust that makes up the ocean basins. Approximately 5 to 10 kilometers thick. See sima layer.
The type of the Earth's crust that underlies the ocean basins. The oceanic crust is generally about 5-10 km thick; it has a density of 3.0 g/cm3, and compressional seismic wave velocities traveling through it exceed 6.2 km/sec.