Basic Geologic Principles
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Created by:
paige_colton on March 9, 2010
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6 terms
Terms | Definitions |
|---|---|
 Superposition | older rock types are deposited first (bottom layer) while newer are progressively added on top |
| Horizontality | sediments are deposited in a parallel to ground fashion (as horizontal layers, beds, or strata). If they are inclined, it means they have been titled since their deposition. Two exceptions: cross-bedding and deposition of mass movement |
| Continuity | strata found truncated at Earth's surface originally extended in all directions |
| intrusion | must be younger than the rock unit it intrudes |
| derivation | Parts of sedimentary rocks that are derived from older rocks |
| Inclusions | parts of older rock unit enclosed in an igneous rock body |
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