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Lab number
CAMS-82411
Material dated
horse bone collagen; collagène osseux de cheval
Taxa dated
Equus conversidens talus (CMN-12444, id. by L.V. Hills and C.R. Harington)
Locality
4 km west of Ross Creek, 12.8 km east-southeast of Medicine Hat, 5.6 km west of Pashley, southeastern Alberta
Map sheet
72 E/16
Submitter
L.V. Hills
Date submitted
March 9, 2006
Normalized Age
10870 ± 45
Significance
palaeobiology; paléobiologie
Context
gravels in a glacial spillway now tributary to Ross Creek
Associated taxa
Mammalia: Equus conversidens
Additional information
AMS date.
Comments
Pashley: When originally reported, the fossils from this site could be given only a minimum age of 8000 BP based on geological evidence, and the Pashley Pit horse bones were consider to represent "the youngest indigenous fossil horse known in North America" (Churcher and Stalker, 1970: 1020). The development of accelerator mass spectrometry dating has opened up new opportunities to determine the ages of such fossils (Hills and Harington, 2003), in this case nearly 3000 years older than supposed.

References