Geochronological dating methods

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Geochronology is the science of determining the age of rocks , fossils , and sediments using signatures inherent in the rocks themselves. Absolute geochronology can be accomplished through radioactive isotopes , whereas relative geochronology is provided by tools such as palaeomagnetism and stable isotope ratios. By combining multiple geochronological and biostratigraphic indicators the precision of the recovered age can be improved. Geochronology is different in application from biostratigraphy, which is the science of assigning sedimentary rocks to a known geological period via describing, cataloging and comparing fossil floral and faunal assemblages. Biostratigraphy does not directly provide an absolute age determination of a rock, but merely places it within an interval of time at which that fossil assemblage is known to have coexisted. Both disciplines work together hand in hand, however, to the point where they share the same system of naming strata rock layers and the time spans utilized to classify sublayers within a stratum.
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Absolute dating

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Absolute dating - Wikipedia

The chronology of the earth's history as determined by geologic events. All rights reserved. Copyright , , by Random House, Inc. Copyright The Gale Group, Inc. Mentioned in? References in periodicals archive? Many of the megalodon fossils seemed to have shifted within the surrounding rock, and this complicated the dating methods the researchers used.
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The chronology of the earth's history as determined by geologic events. All rights reserved. Copyright , , by Random House, Inc.
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Dating , in geology , determining a chronology or calendar of events in the history of Earth , using to a large degree the evidence of organic evolution in the sedimentary rocks accumulated through geologic time in marine and continental environments. To date past events, processes, formations, and fossil organisms, geologists employ a variety of techniques. These include some that establish a relative chronology in which occurrences can be placed in the correct sequence relative to one another or to some known succession of events.
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Video сomments (2)

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