Application of carbon dating in archeology
There are dendrochronological records for Europe and the Aegean, and the International Tree Ring Database has contributions from 21 different countries.
The main drawback to dendrochronology is its reliance on the existence of relatively long-lived vegetation with annual growth rings.
His research culminated in proving that tree ring width varies with annual rainfall.
Many of the first efforts of archaeology grew out of historical documents--for example, Schliemann looked for Homer's Troy, and Layard went after the Biblical Ninevah--and within the context of a particular site, an object clearly associated with the site and stamped with a date or other identifying clue was perfectly useful. Outside of the context of a single site or society, a coin's date is useless.
In 1901, Douglass began investigating tree ring growth as an indicator of solar cycles.
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