All analyses were done in the Argon Laboratory, U.S. Geological Survey, Denver, Colorado using a Mass Analyzer Products 215 Rare Gas mass spectrometer with a Faraday cup.
Summary
All analyses were done in the Argon Laboratory, U.S. Geological Survey, Denver, Colorado using a Mass Analyzer Products 215 Rare Gas mass spectrometer with a Faraday cup.
The coordinates are represented in North American Datum of 1927 (NAD27). Location was derived from the following method(s): Location provided in Hauessler, P.J., and others, 1995, Geology, v. 23, no. 11, p. 995-998