Oceanic crust is generally composed of dark-colored rocks called basalt and gabbro. Basalt Composed of dark-colored rocks called basalt and gabbro
Rockhound. Oceanic crust is predominately made of basaltic rock with a thin layer of sedimentary rock on top. Continental crust is predominately made of granitic rock, with a thin layer of sedimentary rock covering much of the visible surface.  Oceanic crust is the uppermost layer of an oceanic tectonic plate. The crust overlies the solidified and uppermost layer of the mantle. The crust and the solid mantle layer together comprise an oceanic plate. The plates of the Earth together are referred to as the lithosphere. Oceanic crust is the result of erupted mantle material originating from below the plate, cooled and in most instances, modified chemically by seawater. This occurs mostly at mid-ocean ridges, but also at scattered hotspots, and also in rare but powerful occurences known as flood basalt eruptions Oceanic crust is the part of the Earth's crust that makes up the seafloor. It's thinner, denser, and simpler in structure than the continental crust. Oceanic crust is also younger, on average; from its birth at a mid-ocean ridge to its end at a subduction zone is no more than 250 million years.  The oceanic crust is part of the crust that is made fully out of basaltic rock and is several times thinner than the continental crust which is made out of granitic rock. Ocea … nic crust underlies Earth's oceans and is produced at divergent plate boundaries which are commonly referred to as mid-ocean ridges. The oceanic crust is made out of basalts - (lava-hardened Iron/Magnesium Silicate mixtures which solidified rapidly). The continental crust is made of granitic rocks, which have even more silicon and aluminum than the basaltic oceanic crust; they also have more oxygen thanks to the atmosphere. Granitic rocks are even less dense than basalt. The crust can be thicker than 80 kilometers in some spots, less than one kilometer in others. Underneath it is the mantle, a layer of rock some 2700 kilometers thick that accounts for the bulk of the Earth. The crust is primarily made of granite and basalt while the mantle beneath is made of peridotite. the continential crust is made of granitic rocks and the oceanic crust is made of basat and gabbro. the temp of the continential crust is -84.4 to 70.7c and the temp for ocean … ic crust is -18 to 380c and the lithopheric plates are made of felsic rocks. good luck with the rest. 8 people found this useful. The oceanic crust is made out of basalts - (lava-hardened Iron/Magnesium Silicate mixtures which solidified rapidly). Oceanic crust is generally composed of dark-colored rocks called basalt and gabbro. It is thinner and denser than continental crust, which is made of light-colored rocks called andesite and granite. The low density of continental crust causes it to “float” high atop the viscous mantle, forming dry land.  Summary: 1.The oceanic crust is made up of basalt while the continental crust is made up of granite. 2.The oceanic crust is thinner while the continental crust is much thicker. 3.The oceanic crust is denser than the continental crust. 4.The continental crust has greater buoyancy than the oceanic crust. The oceanic crust is that part of the Earth’s crust that covers the ocean basins. It consists of dark-colored rocks made up of basalt. This rock is made up of silicon, oxygen, and magnesium. The density of the oceanic crust is about 3.0 g/cm3. The continental crust is made mostly of rocks with a composition similar to granite (a light-colored rock you would expect to find in the Sierra Nevada), whereas the oceanic crust is made mostly of rocks with a composition of basalt (a dark-colored rock, like the rocks that make up the Hawaiian volcanoes). Because continental crust is less dense than oceanic crust it floats higher on the mantle, just like a piece of Styrofoam floats higher on water than a piece of wood does. The mantle, oceanic crust and continental crust have different densities because they are made of different kinds of rock with different densities. Continental crust is also less dense than oceanic crust, whose density is about 2.9 g/cm 3. Continental crust is considerably thicker than oceanic crust, mostly 25 to 70 km versus the average thickness of the oceanic crust of around 7–10 km. About 40% of Earth's surface is now overlaid by continental crust. Continental crust makes up about 70% of the volume of Earth's crust
http://www.answers.com/Q/What_is_oceanic_crust_and_continental_crust_made_of https://en.wikipedia.org/wiki/Oceanic_crust http://study.com/academy/lesson/oceanic-crust-definition-composition-facts.html http://www.answers.com/Q/What_is_the_oceanic_crust_made_of http://geology.about.com/od/platetectonics/a/thecrust.htm http://www.answers.com/Q/What_is_the_oceanic_crust_made_of http://www.whoi.edu/oceanus/feature/unraveling-the-tapestry-of-ocean-crust http://www.differencebetween.net/science/nature/difference-between-oceanic-and-continental-crust/ http://www.scienceline.ucsb.edu/getkey.php?key=3657 https://en.wikipedia.org/wiki/Continental_crust
oceanic crust made of