Topic: Rocks and Superposition
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How is the principle of superposition is used by geologists to co...
The Law of Superposition in geology states that "Sedimentary layers are deposited in a time sequence, with the oldest on the bottom and the youngest on the top." Most sedimentary rocks show evidence of distinct layers or strata. If you find... Read More »
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How does the principle of superposition help geologists determine...
There are two types of age determinations. Geologists in the late 18th and early 19th century studied rock layers and the fossils in them to determine relative age. William Smith was one of the most important scientists from this time who h... Read More »
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Why does the law of superposition apply mostly to sedimentary roc...
The law of superposition applies mostly to sedimentary rocks because the law of superposition states that each layer is older than the one above it and younger than the one below it. Sedimentary rock is formed mostly by sediments which have... Read More »
Source: http://wiki.answers.com/Q/Why_does_the_law_of_superposition_apply...
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Rocks and Superposition
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A superposed layer of rock is disturbed when faults or instrusions and cracks occur along the earth's crust.
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Geological principle of superposition states that if rock layers are undisturbed,older rock layers are found below younger layers.
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Radiometric dating can give us the absolute age of the rock. Trace fossils and the Law of Superposition can only provide the relative age of the rock. Radiometric dating is far more specific in formation analysis.
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Source: http://wiki.answers.com/Q/What_rocks_are_used_in_radiometric
Superposition states, each bed in a sequence of sedimentary rocks is younger than the bed below it and older than the bed above it
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Law of Superposition: The geologic principle stating that in any pile of sedimentary rocks that have not been disturbed MORE?
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The law states that the oldest rocks will be on the bottom, and the youngest will be on top. This is because the rocks build from the base up. Fossils found in the lowest part of the rock are from some of the oldest organisms on earth.
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Source: http://www.chacha.com/question/where-are-the-oldest-rocks-in-an-u...
