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Natural Resources Canada > Earth Sciences Sector > Geological Survey of Canada > Radiocarbon Dating
Radiocarbon Dating Comparison of Various Types of Materials to Modern Maple Leaves 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.
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Material |
C-13 |
C-14 |
C-14 |
pMC |
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%o |
%o |
%o |
% |
| 1966 |
September |
maple leaves (Gatineau Park) |
-27.1 |
732 |
739 |
174 |
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corn leaves (Ottawa) |
-11.1 |
751 |
703 |
170 |
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corn leaves (Manitoba) |
-10.9 |
755 |
705 |
171 |
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corn kernels (Ottawa) |
-9.5 |
746 |
692 |
169 |
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corn kernels (Manitoba) |
-9.3 |
770 |
714 |
171 |
| 1967 |
September |
maple leaves (Gatineau Park) |
-28.1 |
645 |
656 |
166 |
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maple leaves (Ottawa) |
-26.1 |
659 |
663 |
166 |
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corn leaves (Ottawa) |
-11.1 |
684 |
637 |
164 |
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corn leaves (Manitoba) |
-10.9 |
703 |
655 |
166 |
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corn kernels (Ottawa) |
-9.7 |
672 |
620 |
162 |
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corn kernels (Manitoba) |
-9.5 |
689 |
637 |
164 |
| 1968 |
September |
maple leaves (Gatineau Park) |
-26.3 |
616 |
620 |
162 |
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maple leaves (Ottawa) |
-24.3 |
611 |
608 |
161 |
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corn leaves (Ottawa) |
-11.0 |
632 |
587 |
159 |
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corn kernels (Ottawa) |
-9.3 |
627 |
575 |
158 |
| 1969 |
June |
maple leaves (Gatineau Park) |
-24.6 |
594 |
593 |
159 |
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balsam (Gatineau Park) |
-22.8 |
594 |
587 |
159 |
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July |
maple leaves (Gatineau Park) |
-25.2 |
589 |
590 |
159 |
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hemlock (Gatineau Park) |
-27.7 |
632 |
641 |
164 |
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August |
maple leaves (Gatineau Park) |
-26.9 |
592 |
598 |
160 |
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spruce (Gatineau Park) |
-27.4 |
588 |
595 |
160 |
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September |
maple leaves (Gatineau Park) |
-26.8 |
575 |
580 |
158 |
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fern (Gatineau Park) |
-28.8 |
577 |
589 |
159 |
| 1970 |
July |
maple leaves (Gatineau Park) |
-28.3 |
533 |
543 |
154 |
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willow (Ellesmere Is., NWT) |
-27.8 |
565 |
574 |
157 |
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August |
maple leaves (Gatineau Park) |
-28.3 |
539 |
549 |
155 |
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willow (Ellesmere Is., NWT) |
-27.9 |
559 |
568 |
157 |
| 1971 |
July | maple leaves (Gatineau Park) |
-27.2 |
523 |
529 |
153 |
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birch (Inuvik, NWT) |
-26.9 |
514 |
520 |
152 |
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August |
maple leaves (Gatineau Park) |
-26.4 |
544 |
548 |
155 |
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birch (Inuvik, NWT) |
-27.8 |
521 |
529 |
153 |
| 1980 |
May |
maple leaves (Gatineau Park) |
-27.7 |
317 |
324 |
132 |
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maple leaves (Guelph) |
-25.6 |
320 |
322 |
132 |
- permission to collect material in the Gatineau Park was kindly provided by the National Capital Commission
cf. Lowdon, J.A. and Dyck, W. 1974: Seasonal Variation in the Isotope Ratios of Carbon in Maple Leaves and Other Plants CJES, v. 11, p. 79-88
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