Geology of the Abajo Mountains area, San Juan County, Utah

Abstract

Analyses, in percent, of samples from small distinct oval-shaped ore bodies.________________________________ 7. Analyses, in percent, of samples from a tabular ore body,________________________________________________ 8. Analyses, in percent, of samples from the Lakes Claim deposit. ___________________________________________ 9. Analyses of samples of oval-shaped ore bodies in the Robertson Pasture deposit_____________________________ 97 10. Analyses of samples collected from tabular ore body in the Robertson Pasture deposit. ______________________ 11. Analysis of grab sample from mineralized exposure on Sunshine Mining claim_______________________________ 12. Monthly and yearly discharge of Indian Creek as measured at two gaging stations in the Abajo Mountains area_

Igneous rocks and related mineral deposits of the Barker Quadrangle, Little Belt Mountains, Montana

“…Previously, I have offered some preliminary views on the structural framework of the Little Belt Mountains (Witkind, 1965), on the petrographic relations suggested by the clinopyroxenes from intrusive rocks in the quadrangle (1969), on 'composite dikes (1970), and with M. D. Kleinkopf and W. R. Keefer (1970), on a buried pluton beneath the Precambrian complex. Detailed results of ground-gravity and airborne magnetometer surveys across the Barker and Neihart quadrangles have been published as Geophysical Investigations Map G P-837 ( Kleinkopf and others, 1972) .…”

Remedial action plan and site conceptual design for stabilization of the inactive uranium mill tailings sites at Rifle, Colorado. Appendix D, Final report

“…Glacial deposits and periglacial features in La Sal Mountains indicate the presence of mountain glaciers during the middle and late Pleistocene (Shroder et al, 1980;Richmond, 1962). Rock glaciers and block fields in the Abajo Mountains indicate the presence of periglacial conditions during the Pleistocene (Witkind, 1964). These deposits and features in the western Colorado and eastern Utah region provide evidence that the Estes Gulch area experienced similar climatic fluctuations to those documented in the western United States during the Pleistocene.…”

Geological Survey research 1965, Chapter C

“…The general configuration of the satellitic intrusions suggests that they are laccoliths; their floors, however, are not exposed. The overall structure seems much like that found in such laccolithic complexes as the Henry Mountains , and the Abajo Mountains (Witkind, 1964) in southeastern Utah. A comparable spatial pattern between parental stock and satellitic laccoliths may also be noted in the Sweetgrass Hills of north-central Montana (C. E. Erdmann, oral communication, 1963).…”