Chapter 12 Geologic Time
Quiz by Mrs. Jewell
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32 questions
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- Q1A principle that geologic processes that occurred in the past can be explained by current geologic processesUniformitarianism30s
- Q2Method of determining the age of a fossil by comparing its placement with that of fossils in other layers of rockrelative dating30s
- Q3The geologic principle that states that in horizontal layers of sedimentary rock, each layer is older than the layer above it and younger than the layer below it.Law of Superposition30s
- Q4a principle of relative dating; a rock or fault is younger than any rock or fault through which it cutsprinciple of cross-cutting relationships30s
- Q5The principle that states that layers of sediment are generally deposited in a horizontal or nearly horizontal position.Principle of Original Horizontality30s
- Q6Pieces of one rock unit that are contained within anotherinclusions30s
- Q7A break in the geologic record created when rock layers are eroded or when sediment is not deposited for a long period of time.Unconformities30s
- Q8A type of unconformity in which the beds above and below are parallel.Disconformity30s
- Q9where horizontally parallel strata of sedimentary rock are deposited on tilted and eroded layers, producing an angular discordance with the overlying horizontal layersangular unconformity30s
- Q10An unconformity in which older metamorphic or intrusive igneous rocks are overlain by younger sedimentary strata.Nonconformity30s
- Q11-matching rocks of similar age in different regionscorrelation of rock layers30s
- Q12See image-often relies upon fossils30s
- Q13Preserved remains of once-living organismsFossils30s
- Q14Some remains of organisms—such as teeth, bones, and shells—may not have been altered, or may have changed hardly at all over time.unaltered remains30s
- Q15fossils changed structurally or chemically; minerals may seep into the pores or cavities of an organism's bones, teeth, and shellsaltered remains30s