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Dating of the Bridger Antelope Trap in Wyoming Using Dendrochronology
Presented by Dr. Jim SPEER on 15 May 2013 from 18:00 to 21:00
Type: Poster Presentation
Session: Poster Session + Reception
Board #: 11
The Bridger Antelope Trap is an archaeological site in southwestern Wyoming that was used by American Indians while hunting antelope (Antilopcapra americana). The trap is a large corral constructed from Utah juniper (Juniperus osteosperma) covering 110,000 m2. The primary purpose of the project was to provide information about when the trap was built and used. The juniper wood contained numerous micro and locally absent rings, but we successfully built a chronology back to AD 647 by crossdating with skeleton plots and statistically verifying with COFECHA. Because trap samples exhibited weathering, the actual cutting dates are about 25-50 years after the outermost ring. Outside dates from the antelope trap are continuous (without plateaus of cutting events) from AD 1400 through AD 1725 with a series of samples from the 1100s located along the back wall of the coral, indicating that the trap was continuously remodeled by American Indians long before Euro-American occupation of the land.