Question

what is the basic of oceanic crust

Answer 1

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. ... But most magma crystallises at depth, within the lower oceanic crust.

Answer 2

Introduction to Oceanic crust -

Explanation:

Sea crust is an extension of 65 percent of the world surface, this sea crust is covered with about 5 kilometers of ocean water.

This oceanic crust is found to be structurally similar in all places.

The thickness of this crust is assumed to be 8 km.