1. A type of boundary which created the San Andreas Fault. 3. A large natural elevation of the earth's surface rising abruptly from the surrounding level; a large steep hill. 5. Vibration of the Earth due to rapid release of energy. 8. An opening in the earth's crust through which lava, ash, and gases escape. 10. A thicker type of crust. DOWN: 2. A break in a rock along which movement has occurred. 4. The outer layer of the earth. 6. A type of plate that sink because it is denser. 7. An event in which a slab of rock thrust into the mantle. 9. A boundary which is responsible in the formation of Himalayan wall range.​