Across
- 4. made when sand, mud and pebbles get laid down in layers
- 7. tending to be different or develop in different directions
- 8. rock subjected to high heat and high pressure
- 9. to change a thing into a different thing
Down
- 1. a theory in geology
- 2. a revolutionary theory explaining that continents shift positions on Earth’s surface
- 3. occurring material that is broken down by processes of weathering and erosion
- 4. the sideways and downward movement of the edge of a plate of the earth’s crust into the mantle beneath another plate
- 5. coming closer together
- 6. any of various crystalline or glassy rocks formed by the cooling and solidification of molten earth material