Radiocarbon date reports have been scanned in multi-page PDF files.
History / Biographical
North Lauder Radiocarbon Date report by IsoTrace Laboratory for Atkinson site #TO-10640.
Radiocarbon dating
The technique of radiocarbon dating was developed by Willard Libby and his colleagues at the University of Chicago in 1949.
Radiocarbon dating is used to estimate the age of organic remains from archaeological sites. Organic matter has a radioactive form of carbon (C14) that begins to decay upon death. C14 decays at a steady, known rate of a half life of 5,730 years. The technique is useful for material up to 50,000 years. Fluctuations of C14 in the atmosphere can affect results so dates are calibrated against dendrochronology. Radiocarbon dates are calibrated to calendar years.
Dates are reported in radiocarbon years or Before Present. Before Present refers to dates before 1950. The introduction of massive amounts of C14, due to atomic bomb and surface testing of atomic weapons, has widely increased the standard deviation on all dates after A.D. 1700 causing these dates to be unreliable.
Accelerated mass spectrometry can more accurately measure C14 with smaller samples and can date materials to 80,000 years.
Scope and Content
Sub sub series contains radiocarbon dates from: Atkinson site and Flintstone Hill.
This plate was the property of Edna and Carl Bjarnason. It was in their possession for some fifty years prior to its donation to the University on October, 2005. The Development Office took possession of the plate at that time and transferred it to the Archives in March 2008.
Scope and Content
The plate measures 26 cm in diameter and is white with blue glazing. The centre of the plate depicts the Brandon College Original Building and the words "Brandon College, Brandon Manitoba." The outside of the plate is a flower motif. On the back of the plate, in the same blue as the front, are the words "Canadian View Series, Brandon Manitoba." There is also a trademark of a bird with a banner reading "Trademark England."
