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Figure 7. Gamma-ray log of the Arco Bixby #1 well shows a 500' thick interval with relatively high readings that correspond to the Monterey Formation. Samples collected from core in this interval were analyzed for trace element content. The uranium and selenium content both show strong correlation with the gamma-ray log signature. Compare the three columns at right from Isaacs (1999, unpublished data) and Isaacs et al. (1999).

 image of well log and sample concentrations that show the correlation of the gamma-ray log with both uranium and selenium content

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http://geology.wr.usgs.gov/wreg/env/bixby.html
Contact Margaret A. Keller (mkeller@usgs.gov)
Western Region Energy Group–Environmental Studies
Modified: November 15, 2002

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