Download or read book Geology of the Northeast One quarter of the Prineville Quadrangle North central Oregon written by Neil J. Bingert and published by . This book was released on 1983 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geology of the Northwest One quarter of the Prineville Quadrangle Central Oregon written by David J. Thormahlen and published by . This book was released on 1984 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: The northwest one-quarter of the Prineville Quadrangle is underlain by Tertiary and Quaternary volcanic and volcaniclastic rocks of the Columbia River Basalt Group, and the Clarno, John Day, Rattlesnake and Deschutes Formations. The Clarno Formation is dominated by pyroxene-bearing andesites, but also contains olivine-bearing basalts, oxyhornblende-bearing dacite and rhyodacite flows and intrusives. Many of these rocks are deeply weathered and some have been strongly silicified. The john Day Formation in the area consists of large rhyolite domes and flows, thick tuffaceous deposits, minor trachyandesite flows and welded ash-flow tuffs. The stratigraphy of these john Day rocks is similar to the section exposed in the Ashwood area but lacks some of the upper ash-flow tuff units. Fossil bearing tuffs found within the area are similar to tuffs in the John Day and Crooked River basins and contain fossil leaves that are similar to the Bridge Creek flora. A single flow of the Columbia River Basalt Group is found in the southwest part of the thesis area. This flow has normal magnetic polarity and is similar to the Prineville Chemical type basalt. The entablature of this flow is glassy and very thick. It resembles exposures found at Butte Creek and along the Deschutes River at Pelton Dam and near Gateway. Exposures of the Rattlesnake Ignimbrite Tongue in the northwest part of the thesis area are the western most recognized outcrops of the ignimbrite. Two other exposures of the Rattlesnake ignimbrite were found to the south in Swartz Canyon and near Little Bear Creek. These exposures indicate a previously unrecognized channel for the ignimbrite, trending northwest from its source, entering the Crooked River drainage, and traveling at least as far northwest as Grizzly. The Deschutes Formation is represented by a diktytaxitic basalt flow, epiclastic tuffaceous sediments and air-fall pumice. These deposits lie along the eastern margin of the Deschutes Basin. Structural upwarping along the Blue Mountains Anticline has caused local tilting and folding of the rocks in the area. Most of the Clarno and John Day rocks dip gently to the south. The Deschutes Formation appears to be undeformed. Hydrothermal activity led to the formation of several mineralized breccias which contain abundant silica, lesser amounts of goethite and manganite, and traces of silver and mercury.
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1 957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 29 (thesis year 1984) a total of 12,637 theses titles from 23 Canadian and 202 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 29 reports theses submitted in 1984, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.
Download or read book Geology of Part of the Northeast Quarter of the Mitchell Quadrangle Oregon written by Robert Lynn Patterson and published by . This book was released on 1966 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis area covers 165 square miles including the greater part of the northeastern quarter of the Mitchell quadrangle in north-central Oregon. The three stratigraphic units exposed in the area consist of a variety of Tertiary volcanic rocks including the Clarno Formation, the John Day Formation, and the Columbia River Basalt. The Clarno Formation of Eocene to Early Oligocene age is the oldest rock unit in the thesis area. From oldest to youngest, the mapped units include volcanic boulder conglomerates, andesite and basalt flows and flow breccias, tuffaceous sandstones intercalated with lava flows, and twelve plugs and dikes of andesite and basalt. The composition, lack of sorting, stratigraphic and structural features, and the included flora indicate that the volcanic boulder conglomerates were deposited as mudflows on a terrain of high relief in a humid, subtropical climate. Andesite lavas were extruded intermittently during deposition of the mudflows resulting in complex intertonguing of the two rock types. Later, Clarno lavas poured from numerous isolated fissures and covered the volcanic boulder conglomerates. Near Middle Oligocene time the formation was folded into a broad NE-trending anticline which swings sharply eastward in the north-central half of the area. Following uplift, the Clarno rocks were eroded into a surface of moderate relief and thick fossil soils developed on scoriaceous portions of the lava flows. The John Day Formation of Late Oligocene to Early Miocene age consists of ash flows and ash falls of acid to intermediate pyroclastic material which were deposited unconformably on the deformed and eroded Clarno rocks. These pyroclastics were erupted from unknown local sources, and probably from distant volcanoes to the west. Much of the material deposited on the pre-Miocene anticlinal crest was reworked by streams and formed thick tuff beds on the flanks of the fold. In Middle Miocene time the consolidated John Day Formation was slightly folded parallel to pre-Miocene anticlinal trends and underwent erosion. The Columbia River Basalt was extruded from fissures onto the tuffs during Middle Miocene time. Following deposition the thick layers of basalt were gently folded as the pre-Miocene anticlinal trend again served as the pattern for mild uplift and deformation in latest Miocene time. Rocks younger than Middle Miocene were either never deposited on the basalt plateaus of the area, or have been completely removed by erosion. In Pleistocene and Recent time the plateaus were dissected and the flows were eroded from the anticlinal crest. Landslide, fluvial, and terrace deposits were laid down in the valleys. White volcanic ash was transported by wind from an unknown source and intercalated with Recent fluvial and slope wash deposits.
Download or read book Bibliography and Index of Geology written by and published by . This book was released on 1986 with total page 1354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of the Geology and Mineral Resources of Oregon written by Klaus K. E. Neuendorf and published by . This book was released on 1987 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of the Geology and Mineral Resources of Oregon written by and published by . This book was released on 1980 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin State of Oregon Department of Geology and Mineral Industries written by Oregon. Department of Geology and Mineral Industries and published by . This book was released on 1937 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Geology of the Northeast Quarter of the Bone Mountain Quadrangle Oregon written by Nils Poorbaugh Johannesen and published by . This book was released on 1972 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Geology of the Northeast Quarter of the Huntington Quadrangle Oregon written by Norman Jonathan Berry and published by . This book was released on 1956 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geology of the Northeast Quarter of the Powers Quadrangle Oregon written by Paul Dennis Hess and published by . This book was released on 1967 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geology of the Northeast Quarter of Camas Valley Quadrangle Douglas County Oregon written by James Francis Moore and published by . This book was released on 1957 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oregon State Monographs Number 1 Studies in Geology 1940 Geology of North Central Oregon Geological Map Madras Quadrangle Oregon by Edwin T Hodge Scale 1 125 000 written by Edwin T. HODGE and published by . This book was released on 1940 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Geology of the Northeastern Half of the Jamieson Quadrangle Oregon written by James Alfred Calkins and published by . This book was released on 1954 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geology of the Northeast Corner of the Dayville Quadrangle Oregon written by William Harris Taubeneck and published by . This book was released on 1950 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Volcanoes to Vineyards written by Jim E. O'Connor and published by Geological Society of America. This book was released on 2009 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This volume contains guides for 34 geological field trips offered in conjunction with the October 2009 GSA Annual Meeting in Portland, Oregon. Showcasing the region's geological diversity, the peer-reviewed papers included here span topics ranging from accreted terrains and mantle plumes to volcanoes, floods, and vineyard terroir. Locations visited throughout Oregon, Washington, and Idaho encompass Astoria to Zillah. More than just a series of maps, the accompanying descriptions, observations, and conclusions offer new insights to the geologic processes and history of the Pacific Northwest - insights that will inspire readers to put their boots on the evidence as they develop their own understanding of this remarkable and dynamic corner of the world."--Publisher's description.
Download or read book Geology of a Portion of the Painted Hills Quadrangle Wheeler County North central Oregon written by Jonathan Wayne Huggins and published by . This book was released on 1977 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
