Term
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Definition
| Dating methods that arrange material evidence in a linear sequence, each object in the sequence being identified as older or younger than another object. |
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Term
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Definition
| Dating methods based on laboratory techniques that assign age in years to material evidence. Also known as "absolute dates" even though they are not accurate and have a margin of error. |
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Term
| Stratigraphic Superposition |
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Definition
- Oldest and most venerable technique.
- Dig into earth and look at wall of resulting hole
- Bottom older than top (stratum) |
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Term
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Definition
| Layer; in geological terms, a layer of rock and soil. |
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Term
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Definition
- A principle of geological interpretation stating that layers lower down in a sequence of strata must be older than the layers above them and, therefore, that objects embedded in lower layers must be older than objects embedded in upper layers.
-Rarely remains undisturbed forever. |
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Term
| Law of Crosscutting Relationships |
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Definition
| Intruding geological features must be younger. |
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