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GEOCHRON LABORATORIES adivision of <br />KRUECER ENTERPRISES, INC. <br />771 CONCORD AVENUE • CAMBRIDGE. MASSACHUSETTS 0213e • U S.A <br />TELEPHONE (61718763691 TELEFAX: (617)n,51~01de <br />r , <br />LJ <br />n <br />U <br />RADIOCARBON AGE DETERMINATION <br />REPORT OF ANALYTICAL WORK <br />Our Sample No. GX-23129 <br />Date Received: <br />06/02/97 <br />Your Reference: letter of 05/30/97 <br />Submitted by: Mr. Kelly Payne <br />Mayo and Associates <br />710 East 100 North <br />Lindon, Utah 84042 <br />Date Reported: <br />06/11/97 <br />Sample Name: West Elk AH-3 188-212 Rollins Fault 5/2/97 <br />AGE = 36,200 +3,730/-2,540 C-14 years BP (C-13 corrected). <br />(1.10 +/- 0.41) ~ of the modern (1950) C-14 activity. <br />Description: Sample of groundwater precipitate. <br />Pretreatment: The barium salt precipitate was rapidly vacuum filtered <br />and immediately hydrolyzed, under vacuum to recover <br />carbon dioxide from the barium carbonates for the <br />analysis. C-13 analysis was made on a small portion <br />of the same evolved gas. <br />Comment: <br />b"CPoa . + 1 .0 ~, <br />------------------------------------------- <br />Notes: This date is based upon the Libby half life (5570 years) for'dC. The error stated is t1o as judged <br />by the analytical data alone. Our modern standard is 95% of the activity of N.B.S. Oxalic Acid. <br />The age is referenced to the year A.D. 1950. <br />