Question

what are the types of oceanic crust

Answer 1

The topmost layer, about 500 metres (1,650 feet) thick, includes lavas made of basalt (that is, rock material consisting largely of plagioclase [feldspar] and pyroxene). Oceanic crust differs from continental crust in several ways: it is thinner, denser, younger, and of different chemical composition.

Answer 2

An oceanic plate is a tectonic plate at the bottom of the oceans. The Earth's rocky outer layer turned into solid billions of years ago, soon after the Earth formed. ... The Earth's crust lies on top of the plates - the continental crust - the relatively thick part of the earth's crust which forms the large land masses.

The age of oceanic crust in millions of years. The youngest crust (shown in red) is near mid ocean ridges and spreading zones. All three rock types in the earth's crust—igneous, sedimentary, and metamorphic—can also be recycled back to their originalmolten magma form.