Across
- 1. if one geologic feature cuts across another feature, the feature that it cuts across is older
- 6. a model of Earth's history from its origin many years ago to the present
- 10. species that existed on Earth for a short length of time, were abundant, and inhabited many locations
- 13. principle that states that most rock-forming materials are deposited in horizontal layers
- 14. the principle that states that sediments are deposited in large, flat sheets
Down
- 2. the principle that in undisturbed rock layers, the oldest rocks are on the bottom
- 3. a time when many species on Earth died or became extinct within a relatively short period of time
- 4. a piece of an older rock that becomes part of a new rock
- 5. the age of rocks and geologic features compared with other rocks and geologic features nearby
- 7. a surface where rock has eroded away, producing a break, or gap, in the rock record
- 8. rocks or sediment layers that are used as a marker to correlate rock layers
- 9. preserved remains or evidence of ancient living things
- 11. principle that states that geologic process that occur today are similar to those that have occurred in the past
- 12. matching rocks and fossils from separate locations