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- Lab number
- GX-1640
- Field number
- CMC- 342
- Material dated
- caribou bone apatite; apatite osseux de caribou
- Taxa dated
- Rangifer tarandus tibia (MlVl-1:1, id. by C.R. Harington)
- Locality
- right bank of Old Crow River, Locality CRH-14N, 267 m asl, 800 m below the mouth of Johnson Creek, Porcupine drainage, northern Yukon Territory
- Map sheet
- 116 O/13
- Submitter
- W.N. Irving
- Date submitted
- April 27, 0097
- Measured Age
- 27000
- Normalized Age
- 27245
- δ13C (per mil)
- -10.0
- Significance
- culture?, anomalous, old; anormal, vieux
- Context
- on river bank, presumably redeposited from older sediments
- Associated taxa
- Mammalia: Rangifer tarandus
- Comments
- MlVl-1, Old Crow River Locality CRH-14N: There are twelve radiocarbon dates on seven bones from this locality. MlVl-1:2 and MlVl-1:3 are mammoth limb bone fragments interpreted as artifacts and dated on their apatite fraction. These two bones were entirely destroyed, but casts remain in the collections of the Canadian Museum of Civilization (CMC). MlVl-1:1 is a caribou tibia fleshing tool, much of which was sacrificed for a date on its apatite fraction (GX-1640). The working tip of this tool is preserved in the CMC and was sampled for a date on its collagen fraction (RIDDL-145). MlVl-1:142 and MlVl-1:143 are mammoth limb bone fragments interpreted as bone cores (Morlan, 1980: Pl. 4.8, 4.15), and they are preserved in the CMC, having been sampled by drilling to obtain AMS dates. MlVl-1:143 was dated five times by two AMS labs with somewhat disparate results. The RIDDL lab employed three different methods of collagen extraction in preparing four aliquots of sample material. A mammoth femur (I-3573) and a bison humerus (I-4227) were dated for palaeobiological study.