The shaded areas represent locations where uraniferous black shales are present. Our scientists managed to locate some of this shale in Kansas City, Kansas and remove some of the phosphatic nodules from the shale. The radioactivity present in these nodules was significantly higher than background radiation.
According to The State Geological Survey of Kansas Bulletin 102, Part 3 "Composition of Some Uranium-Bearing Phosphate Nodules from Kansas Shales", samples taken from this particular location were found to contain .03 percent Uranium Oxide.
The bulletin goes on to say:
The phosphatic nodules in Pennsylvanian black shales collected from 11 localities in eastern Kansas have an average composition of 30.2 percent P2O5, 0.017 percent U3O8, and 3.2 percent F. These are combined in a form tentatively identified as a carbonate-bearing fluorapatite mineral. Chemically the percentages lie between those of fluorapatite and dahllite. The sedimentary origin of the nodules tends to emphasize the possibility of the presence of dahllite (carbonate apatite) but the x-ray diffraction patterns agree with previous work suggesting a single carbonate-fluorapatite mineral.
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