Roger D Shew, 2008. "Sheet Sandstones in a Mid-fan Setting: Codorniz Canyon Brushy Canyon Formation, Texas, USA", Atlas of Deep-Water Outcrops, Tor H. Nilsen, Roger D. Shew, Gary S. Steffens, Joseph R. J. Studlick
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The Late Permian Brushy Canyon Formation is well exposed in the Delaware Mountains of west Texas (Figure 1). This third-order, lowstand, deep-water, siliciclastic unit was deposited in the Delaware Basin seaward of a carbonate ramp during the Guadalupian. The Brushy Canyon has been variously subdivided into lower, middle, and upper Brushy Canyon members (Beaubouef et al., 1999). It is an overall progradational wedge of deep-water sediments composed of fourth-order sand-rich cycles that are separated by basinally mappable, highstand, silty intervals. The sandstones may be subdivided into fifth-order cycles. Additional work has been done by Gardner and others (see the various websites and publications from the Colorado School of Mines and Gardner and Borer, 2000) to separate the Brushy Canyon Formation into multiple fans and to highlight the types of deposits. Fugelli and Olsen (2005) used various outcrops from the Brushy Canyon, including Codorniz Canyon, as analogs for basinal deposits in offshore Norway.
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Tor H. Nilsen, a red-haired Scandinavian who stood more than six feet tall, died October 9, 2005, at his San Carlos, California, home. This was after a valiant five-year fight with melanoma cancer. He was 63. His ashes were scattered at his family plot in Norway in 2006.
He was born in New York City on November 29, 1941, to Mollie Abrahamson and Nils Marius Nilsen of Mandal, Norway, and was the first of their children to be born in the United States. After graduating from Brooklyn Tech, he earned his B.S. in geology from City College of New York in 1962. While there, his prowess on the basketball court impressed a scout from the New York Knicks, but Tor went on to graduate school and earned his M.S. and Ph.D. degrees in geology from the University of Wisconsin at Madison in 1964 and 1967, respectively. His M.S. thesis was a study of Precambrian metasedimentary deposits in the Lake Superior area, and his Ph.D. thesis was a study of Devonian alluvial-fan deposits of the Old Red Sandstone in western Norway.
Dr. Nilsen’s principal expertise was in depositional systems analysis, stratigraphic analysis, and the relationships among tectonics, eustasy, and sedimentation. He began his industry career in 1967 as a research geologist with the Shell Development Company in Houston, Texas, and Ventura, California, where he worked on the tectonics and sedimentation of Tertiary shelf systems of coastal California. He subsequently spent two years with the U.S. Army Corps of Engineers as the Military