Term list 2 Geology of National Parks
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Created by:
ngonzales032 on January 22, 2012
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8 terms
Terms | Definitions |
|---|---|
 calcium carbonate | chemical compound, formula CaCO3, found in limestone, shells |
| cross-bedding | sedimentary rock with beds inclined at an angle to the main plane of stratification, can form under flowing water or in sand dunes |
| Glen Canyon Dam | dam completed in 1966 on Colorado River upstream from Glen Canyon Dam |
| law of superposition | in a sedimentary rock sequence that is right-side up (not overturned) the oldest layers are on the bottom, get younger toward the top |
| paleoenvironment | the ancient environment of a time in the geologic past |
| principle of lateral continuity | layers of sediment initially extend laterally in all directions; rocks of a layer that are now separated by a canyon were originally continuous across the area now occupied by the canyon |
| principle of original horizontality | sediments settling out from bodies of water are deposited horizontally in strata that lie parallel to the Earth's surface |
| ripple marks | undulatory surface of ridges and hollows produced by water or wind moving over loose sediment |
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