J.G. Crock W. Mountjoy J.A. Thomas V.E. Shale Paul H. Briggs J.S. Wahlberg M.J. Malcolm Joel S. Leventhal 1978 <p>Using several analytical techniques, results of analysis of U. S. Geological Survey new standard SDO-1 are given for selected elements. The Devonian black shale shows an organic carbon content of approximately 10.3 percent, a sulfur content of approximately 5.6 percent, and a uranium content of approximately 56 ppm. Some elements show higher than average values for black shales: Mn, 389 ppm; Co, 57 ppm; Ni, 128 ppm; As, 104 ppm; and Hg, 0.19 ppm.</p> application/pdf 10.3133/ofr78447 en U.S. Geological Survey Preliminary analytical results for a new U.S. Geological Survey Devonian Ohio Shale Standard SDO-1 reports