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 Core The Core The Core is a 2003 American science fiction disaster film directed by Jon Amiel and starring Aaron Eckhart, Hilary Swank, Delroy Lindo, Stanley Tucci, Tchéky Karyo, DJ Qualls, Bruce Greenwood and Alfre Woodard. The film focuses on a team whose mission is to drill to the center of the Earth and set off a series of nuclear explosions in order to restart the rotation of the Earth's core. The film was released on March 28, 2003 by Paramount Pictures. Geophysicist Dr. Josh Keyes (Aaron Eckhart) and scientists Dr. Serge Leveque (Tchéky Karyo) and Dr. Conrad Zimsky (Stanley Tucci)