Structure of the Earth discontinuity (a second order discontinuity). The uppermost mantle together with the crust constitutes the lithosphere. The crust-mantle boundary occurs as two physically different events. First, there is a discontinuity in the seismic velocity, which is most commonly known as the Mohorovičić discontinuity or Moho. The cause of the Moho is thought to be a change in rock composition from rocks containing plagioclase feldspar (above) to rocks that contain no feldspars (below). Second, in oceanic crust, there is a chemical discontinuity between ultramafic cumulates and tectonized harzburgites, which has been observed from deep parts of the oceanic crust that have been
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