Across
- 3. the science of the study of Earth
- 6. the actual or exact age of a rock or fossil, or how long ago ti formed
- 9. in undisturbed sedimentary rock layers, older layers of rock lie beneath younger rock layers
- 10. describes the age of a rock or fossil in comparison to another rock or fossil
Down
- 1. an igneous rock that forms when magma cools and hardens after cutting through existing rock layers
- 2. forms of life which existed during limited periods of geologic time
- 4. any rock fragments that's included inside of another rock is older than the rock which it is included
- 5. the technique scientists use to determine the absolute age of a material
- 7. a gap in the rock record
- 8. any feature that cuts across a sequence of rocks, is younger than eveything it cuts