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Absolute and relative dating archaeology unit 6 earth forces relative dating

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The date on a coin is an absolute date, as are AD 1492 or 501 SYNONYMS OR RELATED TERMS: relative dates; relative dating techniques CATEGORY: technique; chronology DEFINITION: Dating methods where phases or objects can be put into a sequence relative to each other, but which are not tied to calendrically measured time.

It is the sequencing of events or materials relative to another but without linkage to ages in years bp (before present) or calendar years.

In such cases, archaeologists may employ , with the older layer beneath the latest.

This technique helps the archaeologist arrange the site in a vertical temporal sequence, which may then be compared to sites of similar age or type.

Cross-dating of sites, comparing geologic strata at one site with another location and extrapolating the relative ages in that manner, is still an important dating strategy used today, primarily when sites are far too old for absolute dates to have much meaning.

Suppose the inhabitants of a previous site dug a large hole.

The top of the heap of excavated dirt would date the oldest.

Before the advent of techniques, all dating was relative except where links with historical events could be proved.

Some of these techniques, mainly stratigraphy and seriation, are still useful where chronometric dates cannot be obtained.