Overview: Mesozoic through Early Tertiary Stratigraphic Evolution and Deep-water Deposition of the Magallanes Basin, chile
Andrea Fildani, William H. Crane, Brian W. Romans, Stephen M. Hubbard, Michael R. Shultz, 2008. "Overview: Mesozoic through Early Tertiary Stratigraphic Evolution and Deep-water Deposition of the Magallanes Basin, chile", Atlas of Deep-Water Outcrops, Tor H. Nilsen, Roger D. Shew, Gary S. Steffens, Joseph R. J. Studlick
Download citation file:
The Magallanes Basin (Figure 1) is a retro-arc foreland basin (Suarez and Pettigrew, 1979; Dalziel, 1981; Wilson, 1991) and the sedimentary sequence (Figure 2) preserved in the Andean fold-and-thrust belt reflects both the early extensional phase of basin evolution and the subsequent uplift associated with Andean orogenesis. In the latest Jurassic, extension associated with the initial breakup of southern Gondwana (Bruhn et al., 1979; Gust et al., 1985; Pankurst et al., 2000) culminated in the development of an oceanic backarc basin referred to as the Rocas Verdes Basin (Katz, 1963). Ophiolitic rocks exposed in the Cordillera Sarmiento, south and west of Parque Nacional Torres del Paine, represent the obducted remains of the floor of this backarc basin.
Figures & Tables
Atlas of Deep-Water Outcrops
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