Natural Resources CanadaGovernment of Canada
 
 Français ÿ  Contact us ÿ  Help ÿ  Search ÿ  Canada site
 ESS Home ÿ  Priorities ÿ  Products &
 services		 ÿ  About the
 Sector		 ÿ  Site map
Satellite image of Canada
Natural Resources Canada
Radiocarbon Dating
.Home
.Laboratory
.Age Calculations
.Quality Assurance
.International Quality Assurance
.Collaborative Study
.IAEA Radiocarbon Q/A Program
.TIRI
.Internal Crosschecks
.Publications
.RC Dates
.Date List Publications
.Special Projects
.Ambient Levels
.Comparisons
.Marine Reservoir Ages

Geological Survey of Canada
Geological Survey of Canada

Proactive disclosure

Print version Print versionÿ		ÿGeological Survey of Canada
Natural Resources Canada > Earth Sciences Sector > Geological Survey of Canada > Radiocarbon Dating
Radiocarbon Dating
Crosschecks on Archival GSC Shell Samples

The Geological Survey of Canada Radiocarbon Dating Laboratory ceased operation at the end of 2005. This site will be maintained to provide reference information on the samples dated during the 45 years of operation of the GSC laboratory from 1960 to 2005.

 

  GSC-39 GSC-47 GSC-241 GSC-286 GSC-392 GSC-683
Original date (1960s) 9440 +/- 1208700 +/- 120 9280 +/- 1506850 +/- 1409260 +/- 1502320 +/- 130
New date (1990s) 9460 +/- 80 8720 +/- 80 9440 +/- 907080 +/- 120 9240 +/- 90 2200 +/- 80
del C-13 (%o) +1.83 +0.33 +1.41 +2.52 +0.73 +2.87
New Corrected
to 0 %o		 9490 +/- 80 8730 +/- 80 9460 +/- 90 7120 +/- 120 9250 +/- 90 2240 +/- 80
Normalized
to -25 %o		 9890 +/- 80 9130 +/- 80 9860 +/- 90 7520 +/- 120 9650 +/- 90 2640 +/- 80

2006-03-07Important notices