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Cards In This Set
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In any sequence of sedimentary rock layers that have not been subjected to stress, you would expect to find
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Both horizontal layers and older layers at the bottom and younger layers at the top
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If you wished to date a rock thought to be namy millions of years old, which of the following would be the least useful?
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Carbon-14 method
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An unconformity can be interpreted as
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A buried surface of erosion
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The precambrian witnessed the development of
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All of these
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The most important event during the cambrian period was the
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Ability of organisms toform an outer skeleton
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The principle of superpostion states that the top layer of rock is
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The youngest
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The paleozoic era begins with the cambrian and concludes with the
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Permian period
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The first time period for which abundant fossils have been found is the
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Cambrian
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Radiometric dating is based on
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Proportions of radioactive isotopes and their decay products
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Fossils are found in
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Sedimentary and some metamorphic rocks
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The fossil record is the record of former life forms as preserved in the earth's rocks. which of the following is not representative of the fossil record?
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The paleozoic era is credited with the emergence of life
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The cenozoic era represents a period of
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Almost continuous tectonic activity
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During the Pleistocene ice age
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There were several episodes of glacial advance and retreat
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You would expect to find the least number of fossils in rocks from the
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Precambrian era
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The cenozoic era is known as the
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Age of the mammals
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