ANTH208 final exam otago
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18 Terms
Potassium argon dating timeframe
100,000 to deep time
Flinder’s Petrie
An archaeologist who applied seriation to Egyptian pottery
Half life of carbon 14
5,700 years
How is C14 decay measured?
Accelerated mass spectrometry
When was radiocarbon dating developed
1946-1949
Why do we use C14, other than other carbon isotopes?
It is more common, and less stable (the others don’t degrade in a way that is easy to measure)
Two types of trapped electron methods
Thermoluminescence and optical luminescence
Main flaw of stratigraphic dating
Risk of disturbance
C14 decays into
Nitrogen
Potassium degrades to
Argon
The suess effect
The industrial revolution changed the ratio of c12 and c14
When was dendochronology invented?
1911
Radiocarbon dating timeframe
400 - 50,000 years
Bone chemical dating
Flourine and uranium increases in bones. Nitrogen decreases in bone
Trapped electron method timeline
1000 to 300,000 years
Uranium dating timeline
50,000 to 500,000 years
What can uranium dating be used for?
Calcium carbonate - limestone and bone
What kind of region can dendochronology be used for?
Temperate only