Oceanic crust Oceanic crust 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. 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 primarily composed of mafic rocks, or sima, which is rich in iron and magnesium. It is thinner than continental crust, or sial, generally less than 10 kilometers thick; however it is denser,
It'z Just What We Do It'z Just What We Do It'z Just What We Do is the second EP by American country music duo Florida Georgia Line. It was released in May 2012, by Big Loud Mountain. All five songs from the album later appeared on their debut studio album, "Here's to the Good Times" (2012). Jessica Nicholson of "Country Weekly" gave the album a very positive review, saying that "Newcomers Brian Kelley and Tyler Hubbard of Florida Georgia Line first met while students at Nashville’s Belmont University, and melded their diverse musical backgrounds to create their first five-song EP. No softhearted love songs here,