Radiometric dating geological time scale

How would the human time scale be different if we measured it in relative, instead of specific, time? Choose the best answer. Radiometric dating involves absolute dates; the geologic time scale is measured with relative dates. Radiometric dating involves relative dates; the geologic time scale is measured with absolute dates. Played 0 times. Print Share Edit Delete Report an issue.
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Geologic Time

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How does relative and absolute dating were used to determine the subdivisions of geologic time?

The vast expanse of geological time has been separated into eras, periods, and epochs. The numbers included below refer to the beginnings of the division in which the title appears. The numbers are in millions of years. The named divisions of time are for the most part based on fossil evidence and principles for relative dating over the past two hundred years.
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How does relative and absolute dating were used to determine the subdivisions of geologic time?

During the 19th century, and even well into the twentieth, geological chronology was very crude. Dates were estimated according to the supposed rate of deposition of rocks, and figures of several hundred million years were bandied out; usually arrived at through inspired guesswork rather than anything else. With the discovery of radiometric dating, it became possible for the first time to attempt precise figures. Radiometric dating works on the principle that certain atoms and isotopes are unstable.
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Radiometric dating calculates an age in years for geologic materials by measuring the presence of a short-life radioactive element, e. The term applies to all methods of age determination based on nuclear decay of naturally occurring radioactive isotopes. Bates and Jackson To determine the ages in years of Earth materials and the timing of geologic events such as exhumation and subduction, geologists utilize the process of radiometric decay.
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