ANTH240-sept25

ANTH240-sept25 - ANTH240-sept25 Absolute Dating Methods...

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ANTH240-sept25 Absolute Dating Methods Yearly Cycles-Seasonal: Cross-Dating (can be both relative and absolute): gives an object an absolute date, all other artifacts based off it -Terminus post quem: “date after which.” Earliest point in time artifact can enter archaeological record -Terminus ante quem: “date before which.” Artifact /feature older than Dendochronology : tree-ring dating -good for 8k years in past -match tree-ring growth through time -each annual growth event leaves a distinct, unique signature -count backwards across yearly rings from known dates to matching, overlapping series in older trees -pine/oak trees most common -need well preserved, visible rings -only works in certain areas Radiometric Techniques: -Radiocarbon, 14C -Potassium Argon, K/A -Fission Track -All of these methods use principle of radioactive decay -archaeologists most generally use radiocarbon dating Radiocarbon Dating : -discovered by Willard libby 1949 -all living organisms contain 3 types of carbon, some radioactive
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This note was uploaded on 04/08/2008 for the course ANTH 240 taught by Professor Chisholm during the Fall '07 term at Maryland.

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ANTH240-sept25 - ANTH240-sept25 Absolute Dating Methods...

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