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Alaska
3
PERM
3
Sampling permafrost
3
Tanana_R-plain
USA
3
Age
2
DEPTH
2
sediment/rock
2
standard deviation
2
-
1
14C AMS
1
Caesium-137
1
Carbon
1
DATE/TIME
1
IPY
1
International Polar Year (2007-2008)
1
Laboratory
1
Lead-210
1
Location
1
Radium-226
1
Sample ID
1
activity per mass
1
dated
1
dated material
1
dated standard deviation
1
mass per area
1
organic
1
unsupported
1
δ13C
1
δ14C
1
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