Mark chapin, 2008. "Sheets and Incised Channels of the Kilcloher Cliff Section, Ross Formation, Ireland", Atlas of Deep-Water Outcrops, Tor H. Nilsen, Roger D. Shew, Gary S. Steffens, Joseph R. J. Studlick
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The Kilcloher Cliff outcrops of the Carboniferous Ross Formation, western Ireland, provide spectacular, laterally extensive exposures of deep-water sandstones. The geology of these cliffs have been interpreted from photomosaics, with a ground calibration measured section at the west end. Please see the paper on the Kilbaha Bay outcrop for introductory details and details of sedimentary structures, which are much easier to observe and describe in that section (chapin, chapter 51, this volume). The upper part of the west Kilcloher section is dominated by relatively continuous sandstone beds, 0.3-4 m (1-12 ft) thick. Many sandstones are amalgamated, but there are some shales and thinly laminated intervals with enough continuity to break up the section vertically. Although the bed tops and bases appear parallel, the thicknesses of many beds vary across the exposure. A notable feature is the seeming lack of channels in the upper, sandstone-rich section as compared to other sandy exposures of the Ross Formation, where small-scale channels are obvious. The contact between the upper, sandstone-rich cliff section and lower, shalier section is sharp, but not obviously erosional. The lower part of the west Kilcloher cliff section contains an interval of continuous, thin- to thick-bedded sandstones interbedded with approximately equal thicknesses of shales (54% sand overall). These beds display little lenticularity or erosional features, and most sandstone and mudstone beds extend across the entire outcrop section. The lower interval is exposed for more than twice the distance of the upper cliff section, due to weathering over several small folds. The lower interval displays a classic representation layered-sheet architecture.
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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