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24 Cards in this Set
- Front
- Back
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What are the details of rock records
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rocks record geological events and changing life forms of the past
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What are the details of relative dating
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to identify which rock units formed first, second, third, and so on.
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What does relative dating tell us
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the sequence in which events occurred
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What does relative dating not tell us
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how long events occurred
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What are the details of correlation of rock layers
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the develop a geologic time scale that can be applied to the Earth, rocks of similar age in different regions must be match.
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What are the details of unconformities
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breaks in the rock record. It represents a long period during which deposition stopped erosion removed. Previously formed rocks, and then deposition resumed
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What are the details of history of geology
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by studying rocks, especially sedimentary rocks, geologists can begin to understand and explain the past
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What information about Earht;s history do rocks record
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rocks record geological events and changing life forms of the past
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Is it true or false that by examining the rock record, we have learned that Earth is much younger than it was previsouly thought to be
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false
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The concept that the processes at work on Earth today were also at work long ago is known as the principle of
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uniformitarianism
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is it true or false that scientists use relative dating to tell how long ago events occurred on Earth
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false
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what is the principle of original horizontality
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the layers of sediments are generally deposited in a horizontal position
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Dike B is what than Fault B
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older
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what is the law or principle for Dike B and fault B
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cross-cutting relationships
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The shale is what than the sandstone
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younger
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what is the law or principle of the shale and sandstone
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superposition
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Dike B is what than the batholith
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younger
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what is the law or principle of Dike B and the batholith
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cross-cutting relationships
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the sandstone is what than Dike A
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older
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The conglomerate is what than the shale
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older
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represents a long period when deposition stopped, erosion occurred, and deposition reusmed
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unconformity
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two sedimentary rock layers separated by an erosinal surface
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disconformity
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represents a period when deformation and erosion occurred
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angular unconformity
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what is the task of matching up rocks of similar age in different regions
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correlation
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