Absolute dating relative vs how accurate is potassium argon dating

In a way this field, called geochronology, is some of the purest detective work earth scientists do.

These break down over time in a process scientists call radioactive decay.

The style of the artefact and its archaeology location stratigraphically are required to arrive at a relative date.

For example, if an artefact, say an oil lamp, is found co-located on the same floor of a governor's dwelling, and that floor can be dated in archaeology terms by reason of the patterns employed in the mosaic, then it is assumed that in relation to the floor that the lamp is of the same age.

To determine the relative age of different rocks, geologists start with the assumption that unless something has happened, in a sequence of sedimentary rock layers, the newer rock layers will be on top of older ones. This rule is common sense, but it serves as a powerful reference point.

Geologists draw on it and other basic principles ( to determine the relative ages of rocks or features such as faults.

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