On the other hand continental crust remains where it is for billions of years and it is much older than oceanic crust.
Is granite oceanic crust.
The crust overlies the solidified and uppermost layer of the mantle the crust and the solid mantle layer together constitute oceanic lithosphere.
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.
Oceanic crust is about 6 km 4 miles thick.
The lower layer of oceanic.
It is composed of several layers not including the overlying sediment.
Composition of oceanic crust.
Continental crust is broadly granitic in composition and with a density of about 2 7 grams per cubic cm is somewhat lighter than oceanic crust which is basaltic i e richer in iron and magnesium than granite in composition and has a density of about 2 9 to 3 grams per cubic cm.
It is thinner denser younger and of different.
Continental crust is typically 40 km 25 miles thick while oceanic crust is much thinner.
This is made up of basaltic rocks in the shape of pillows and sheets.
By contrast the continental crust is made up of light colored granite rocks full of substances like oxygen and silicon.
The oceanic crust is mainly made out of dark basalt rocks that are rich in minerals and substances like silicon and magnesium.