Across
- 1. radioactive decay
- 5. old rock layer
- 6. a naturally occurring solid. It is made of minerals
- 8. newest rock layers
- 9. geologic feature or rock body that cuts across or deforms another
Down
- 2. THE age of rock layers
- 3. the remains or traces of plants and animals that lived long ago
- 4. layers of rock, or sometimes soil
- 7. the action of placing one thing on or above another, especially so that they coincide
- 10. The idea of the rock age layers