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Lab number
TO-1829
Material dated
bone collagen; collagène osseux
Taxa dated
Mammalia
Locality
Ghostpine Creek, near Three Hills, Red Deer drainage, southern Alberta
Map sheet
82 P/11
Submitter
R.B. Rains
Date submitted
February 24, 2004
Normalized Age
7610 ± 70
Significance
palaeobiology; paléobiologie
Context
alluvial terrace, dating the transition from T-1 aggradation to early T-2 degradation
Associated taxa
Mammalia: Bison bison
Additional information
AMS date.
Comments
Kopjar bison: Measurements of the skull and post-cranial elements indicate that this was an adult bull bison of the plains bison form (Bison bison bison). The animal apparently died in the T-2 channel of Ghostpine Creek and was soon buried, probably by sedimentation during waning flow of a single flood (Rains et al., 1994: 1504). There is evidence of scavenging by a coyote-size carnivore that left tooth marks on the right humerus head and also chewed off the spinous processes of the 9th-15th thoracic and 1st lumbar vertebrae. Just as AECV-944 dates a transition from T-2 aggradation to T-3 degradation, an older date (TO-1829) on a bone recovered a short distance upstream marks the transition from T-1 aggradation to T-2 degradation. Rains and others (1994) discuss the implications of these dates for the reconstruction of post-glacial incision of creek and river valleys following the drainage of glacial lake Drumheller.

References