Stratigraphy relative dating

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If both the blue and orange ammonites are found together, the rock must have been deposited during the time interval indicated by the red box, which represents the time during which both fossil species co-existed. Main article: Jeffrey Eighmy's Archaeometrics Laboratory at Colorado State provides details of the method and its specific use in the American southwest. The stratigraphy of an area provides the basis for putting together the geologic history of an area. Dating techniques are procedures used by scientists to determine the age of a specimen. Instead, there is just an unconformity, a buried erosional or non-depositional surface.

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Dating Rocks and Fossils Using Geologic Methods

A major unconformity would mark the change from the building up of mountains to the wearing down of those same mountains and the subsequent blanketing of the area with sediments. Dates derived from dendrochronology may be misleading if the occupants used relict wood to burn in their fires or construct their houses. Figure 5: Relative dating technique stratigraphy. Limitations on top to determine the age of superposition. Relative dating does not provide actual numerical dates for the rocks.

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