File:Penn carbondale 4-14.jpg
Figure 4-14. Gamma ray/density and neutron log from the Peabody Natural Gas No. 2 Short borehole in sec. 14, T 7 S, R 7 E, Hamilton County, Illinois, illustrating the log response of Davis, Will Scarlet, Dekoven, and associated units. © University of Illinois Board of Trustees.
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