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Relative and Absolute Dating Crossword Puzzle
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Across
1. The relative dating principle that explains why a pebble in a conglomerate must be older than the conglomerate itself.
4. The relative dating principle that explains how you would know that the tilting of layered surface rocks must have occurred after the rocks were originally formed.
5. The type of unconformity found between parallel layers of rocks that form on the earth's surface.
6. A 2-dimesional representation of the rocks below the earth's surface.
8. The relative dating principle that says rocks that are deposited in layers extend out in all directions...
10. The dating practice that assigns some numeric value to an event.
11. The relative dating principle that explains why a dike must be younger than the rocks it cuts through.
13. The type of unconformity found between two types of rock that can not naturally form next to each other.
14. Radioactive decay of parent isotopes to daughter products occurs at a predictable rate. We describe this rate in terms of _____ _____.
Down
2. The relative dating principle that explains why the layered rocks on the rim of the Grand Canyon must be younger than the layered rocks near the bottom of the canyon.
3. The dating practice of placing rocks and geologic events in their proper order of occurrence.
7. If you observed a baked contact between a granite and a sandstone, which of those 2 rocks must have been there first?
9. The type of unconformity found between a contact of tilted layers of surface rock, and non-tilted layers of surface rock.
12. A ratio of 1/4 original isotope to 3/4 daughter product show us how many half-lives?
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