Oceanic crust<span> is about 6 km 4 miles thick.It is composed of several layers not including the overlying sediment. the topmost layer, about 500 metres 1,650 feet thic includes lavas made of basalt (that is, rock material consisting largely of plagioclase feldspar and pyroxene).</span>
The oceanic crust is: 1) Is about 4 miles thick (6km) 2) It is composed of several layers not including the overlying sediment 3) The topmost layer is 1,650 feet thick 4) The temperature ranges from 900 degrees to 1,800 degrees Hope this helps!
