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37 Cards in this Set
- Front
- Back
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uniformitarianism
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gradual change, shaped earth over a period of time
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catastrophism
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sudden geologic change
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superpostion
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younger rock over older rock, method used to determine relative dating
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geologic change
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can be sudden or gradual
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modern geology
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believes in a compromise between two theories
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earths age
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4.6 billion years old
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relative dating
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age of rock
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geologic column
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ideal rock sequence used to determine relative age
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disturbances
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changes in rock layer
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folding
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bending of rock
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tilting
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angling of rock layers
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fault
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breaking of rock layers
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intrusion
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igneous rock pushing up into rock layers
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uncomfomites
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missing rock layers, gaps
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discomfomites
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most common, gap in strata or layers
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nonconfomites
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gap between sediment and igneous
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angular confomites
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gap between sediment and foldingq
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crosscutting
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a feature or disturbance in rock layer
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fossils
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remnants of past living organisms or articles
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permineralization
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tissues filled by minerals
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mummification
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dried out or preserved
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petrification
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tissues completely replaced my minerals
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frozen
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some of the best preserved fossils
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trace
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tracks,footprints mark left behind from an animal
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mold
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empty carity
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cast
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filled in mold
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burrow
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fossilized shelter
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corprolite
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clues to habits and diets of once living organisms
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index
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found in relatively short periods of time
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tar pits
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Siberian tigers
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amber
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bugs/insects
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sedimentary rock
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where most fossils are found
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ice
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best fossils
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order of geologic units
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Eons-Eras-periods-Epochs
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Paleozoic era
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age of plants and amphibians
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Mesozoic era
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age of reptile
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Cenozoic era
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age of mammals -present day
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