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,
The Crust Brothers it through the grapevine," "while the Crust Brothers are inside it, [it] can sound like the best version of the song ever played." Additional shows took place on December 30, 1998, at The Breakroom in Seattle, and on January 1, 1999, at the Starfish Room in Vancouver, British Columbia. The band returned to the Crocodile Cafe on December 31, 2000. A song from that set, a cover of Dylan's "Spanish Harlem Incident" sung by Dahlquist, is the sixth track on Silkworm's final EP, "Chokes!" The Crust Brothers The Crust Brothers, a band formed by Stephen Malkmus and members of Silkworm