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