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4 Cards in this Set
- Front
- Back
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index fossil |
remains of living organisms that are found in many places at a SPECIFIC time period. Example: trilobites were common 540 to 245 million years ago (mya) |
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radiocarbon dating |
a way to date the remains of a living organism (based on how much Carbon-14 it has). After dying, the amount of Carbon-14 "decays" or changes into another element. |
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law of superposition |
if rock layers are NOT disturbed, then the YOUNGEST layer is on the top and the OLDEST layer is on the bottom |
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law of unconformity |
results when earlier sediments are eroded before being buried under sediments deposited during a later episode of sedimentation. In general, the term unconformity describes any break in the sedimentary geologic record. There are three forms of unconformities: disconformity, nonconformity, and angular unconformity. |
