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Books > Science & Mathematics > Physics > Applied physics & special topics > Geophysics
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Absolute Age Determination - Physical and Chemical Dating Methods and Their Application (Paperback, Softcover reprint of the original 1st ed. 1990)
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Absolute Age Determination - Physical and Chemical Dating Methods and Their Application (Paperback, Softcover reprint of the original 1st ed. 1990)
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With the growing recognition during the last two centuries that the
Earth has an immense age and processes over long periods of time
have changed the morphology and composition of the Earth's crust,
geologists have become increasingly interested in determination of
absolute ages. A rela tive geochronology was established on the
basis of the lithostratigraphic and biostratigraphic principles
developed during the last century. With the discovery of
radioactivity, the basis for a new geoscientific discipline -
geochronology - was established (Rutherford 1906). It is the study
of geological time, based mainly on the time signatures provided by
the isotopic composition in geologic materials. The isotopic
signature in a rock yields more information than that provided by
the geochemical signature alone because it reflects the origin and
history of the element in the rock. The aim of geochronology is to
calibrate and standardize chronostrati graphic scales, to develop
geological time scales that have a sensitive or at least useful
resolution in order to place the geological events in the correct
chronological order, and to assign their proper time spans. In
practice, the application of geochronology is much wider because
the data in the "natural archives" often provide information on the
origin, genesis, and history of the materials. This, of course,
requires an understanding of the geochemical behavior of the
substances involved.
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