Term
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Definition
| study of rock strata and their chronology |
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Term
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Definition
| study of rock strata and their chronology |
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Term
formation
naming conventions |
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Definition
type, locality and rock type;
columbia river basalt, pierre shale
(if no dominant rock just use formation)
troutdale formation |
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Term
| law of original horizonatality |
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Definition
| beds deposited horizontally |
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Term
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Definition
| oldest beds at bottom and youngest at top |
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Term
| law of faunal assemblages |
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Definition
| like assemblages of fossils gives like ages for the rocks |
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Term
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Definition
| if a fault, fold, or unconformity cuts across a rock unit, it is younger than the unit |
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Term
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Definition
| natural laws operating today also prevailed in the past (gravity is still gravity) present is key to past |
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Term
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Definition
| piecing together the column over an area. |
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Term
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Definition
| buries erosion surface between two depositions; failure planes and conduits for water |
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Term
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Definition
beds at angle with one another;
1. beds deposited
2. tilted
3. eroded
3. final deposition |
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Term
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Definition
| beds parallel above and below |
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Term
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Definition
| sedimentary beds on crystaliine rocks |
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Term
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Definition
cenozoic
mesozoic
paleozoic
precambian |
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Term
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Definition
| gives the surficial deposit ( glacial ,stream, wind |
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Term
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Definition
relief- brown contours
water-blue
cultural features
highways- red
updates- purple |
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