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- Lab number
- GSC-1068
- Field number
- CMC- 96
- Material dated
- soil; sol
- Locality
- near Moose Lake, Beaver Valley, Churchill drainage, east-central Alberta
- Map sheet
- 73 L/08
- Submitter
- A.L. Bryan
- Date submitted
- March 13, 0098
- Measured Age
- 4630 ± 150
- Normalized Age
- 4710 ± 150
- δ13C (per mil)
- -20.4
- Significance
- geoarchaeology; géoarchéologie
- Context
- paleosol sample, humic acid extracted at the Alberta Research Council, stratum 4, squares II50 and JJ50, 20-60 cm depth
- Comments
- GbOs-100, Caribou Island: This site yielded a long palaeoclimatological and archaeological sequence for post-glacial times, commencing with raised beach deposits containing only unifacially flaked cobble tools. The early surface was scoured by prevailing southeasterly winds. Later, the prevailing winds shifted to the northeast and deposited parabolic dunes on the island. New types of artifacts are found in the dune deposits. Increasing moisture stabilized the dunes and formed a soil which yielded the earliest projectile points. The dunes were later re-activated and finally reconsolidated. GSC-660 should date the initiation of dune re-activation. It is possible that the buried soil was truncated at this time and that the dated charcoal was originally in the soil. However, it appears more likely that the fire was built on or above the palaeosol after the dune had become active. GSC-1068 dates a period of relatively moist climate during a longer, more arid phase of sand dune formation.