 | | Report (issue) | | the Aspen 15-minute Quadrangle, Pitkin and Gunnison Counties, Colorado By BRUCE BRYANT GEOLOGICAL SURVEY...A study of an area at the intersection of the Colorado mineral belt with the west flank of the Sawatch...the Aspen 15-Minute quadrangle, Pitkin and Gunnison Counties, Colorado (Geological Survey Professional...Bibliography: p. 123 1. Geology Colorado Aspen region. 2. Mines and mineral resources Colorado Aspen region. I. Title...Tertiary igneous rocks ............................ Granodiorite ........................................ Alteration |  | | Report (issue) | | thrust-a major fault in the eastern part of Inyo County, Calif., by J. H. Stewart, D. C. Ross, C. A. Nelson...Permian-Triassic boundary in eastern Uintah County, Utah, and western Moffat County, Colo., by E. M. Schell and E....relation to· time of intrusion, by K. G. Books, W. S. White, and M. E. Beck, Jr ________ --,- _____________...132 Rock mechanics Uphole seismic measurements as an indication of stress relief in granitic rock tunnels...Geochronology Biotite, potassium-feldspar, and whole-rock ages of adamellite, Clark Mountains, Wes~ Antarctica |  | | Report (issue) | | in the Little Snake River area of northwestern Colorado, by E. J. McKay. . Disseminated sulfide deposits...Tocantins complex, Niquelandia, Goias, Brazil, by R. W. White, Jorge. Motta, and V. A. de Araujo Page D1 9 13...and potassium-argon ages of the Mount Stuart Granodiorite and Beckler Peak stock, North Cascades, Wash...lacustrine Pliocene tuffs near Wikieup, Mohave County, Ariz., by R. A. Sheppard and A. J. Gude 3d . .... . . Permian deformation in the Eagle basin, Colorado, by V. L. Freeman . . . . . . . . . . . . . . |
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