Structure of the Earth obducted onto the continental crust and preserved as ophiolite sequences. Many rocks now making up Earth's crust formed less than 100 million (1) years ago; however, the oldest known mineral grains are about 4.4 billion (4.4) years old, indicating that Earth has had a solid crust for at least 4.4 billion years. Earth's mantle extends to a depth of 2,890 km, making it the thickest layer of Earth. The mantle is divided into upper and lower mantle. The upper and lower mantle are separated by the transition zone. The lowest part of the mantle next to the core-mantle boundary is
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