Across
- 3. A rupture in the crust of a planetary-mass object that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
- 6. This igneous rock is often used for countertops and monuments.
- 9. A type of rock that has been changed by extreme heat and pressure.
Down
- 1. The process by which rock, sand, and soil are broken down and carried away.
- 2. Preserved remains or traces of animals, plants, and other organisms from the remote past.
- 4. Tectonics A theory explaining the structure of the earth's crust and many associated phenomena resulting from the interaction of rigid lithospheric plates that move slowly over the underlying mantle.
- 5. Type of rock formed by the deposition of material at the Earth's surface.
- 6. A round rock which contains a hollow cavity lined with crystals.
- 7. Sedimentary rock largely composed of the mineral calcite, often forms in clear, warm, shallow marine waters.
- 8. A hard mineral composed of silicon and oxygen, often used in jewelry.