Download or read book Cenozoic Stratigraphy and Structure of Pueblo Mountains Region Oregon Nevada written by Jon Carlton Avent and published by . This book was released on 1965 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book R024 Bibliography of Nevada mining and geology 1966 1970 written by and published by NV Bureau of Mines & Geology. This book was released on with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Structure and Stratigraphy of a Portion of the Trout Creek Mountains Harney County Oregon written by Richard W. Carlton and published by . This book was released on 1969 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis area is located in the southeastern corner of Harney County, Oregon. This portion of Oregon is situated in the northern part of the Basin and Range province, and is characterized by both mafic and silicic extrusives, and localized nonmarine sediments and tuffs ranging in age from middle Miocene to Recent. The rocks of Miocene and some Pliocene age have been cut by normal faults forming typical Basin and Range structure. The base of the stratigraphic sequence within the thesis area is formed by 775 feet of thin, highly porphyritic basalt flows. On the basis of petrographic and field similarities, these basalts have been correlated with the Steens Basalt of Fuller (1931). Overlying the porphyritic basalts are 980 feet of fine-grained, andesitic basalt flows, and flow breccias. These basalts superficially resemble the Steens Mountain volcanic series of Fuller but they occupy a higher stratigraphic position and may be correlative with the Owyhee Basalt of Renick (1931). Covering the andesitic basalt, but generally poorly exposed are approximately 155 feet of vitric and lithic-vitric air fall tuffs. These tuffs and the overlying ash flow tuffs may be genetically related and probably represent a period of silicic extrusion within the thesis area. Four ash flow tuffs are recognized and described. They appear to have been extruded over a short period of time and may represent a compound cooling unit. The basal ash flow (unit one) is 330 feet thick and characterized by large flattened pumice fragments in the middle welded zone. Covering the basal ash flow is a 230 foot thick ash flow (unit two) composed of a nonwelded base, a dense vitrophyre, and a thick partly welded upper zone. A third ash flow (unit three) whose maximum thickness is 225 feet overlies unit two and is characterized by extremely flattened pumice fragments and platiness. A fourth ash flow (unit four) found only on Red Mountain overlies unit three and has a maximum thickness of 10 feet. The ash flow tuffs are probably not related to the Canyon Rhyolite of Merriam (1910) and are middle to late Miocene in age. Locally overlying the ash flow tuffs is a thick sequence of varicolored, thickly bedded vitric tuffs. These tuffs are correlated with the Trout Creek Formation on the basis of similar stratigraphic position. Stratigraphically above the Trout Creek Formation is a series of coarse angular conglomerates and fine lacustrine sediments which were deposited in stream channels, and as alluvial fans and slope wash during periods of high stream discharge. These sediments are correlated with the Turn-Turn Conglomerates found on the west side of Pueblo Valley. The Turn-Turn Conglomerates are covered on the west by Pliocene and Pleistocene terrace deposits composed primarily of unconsolidated volcanic gravels and pebbles. Structurally the western half of the thesis area is part of the Pueblo Valley graben while the eastern half forms the Trout Creek Mountains. Most of the faults cut the ash flow tuffs and strike within 30° east or west of due north. Donath postulates that this fault pattern may represent original conjugate strike slip shears caused by a north-south maximum principal stress. At a later time block faulting occurred along the previously formed shear zones forming the present topography.
Download or read book U S Geological Survey Bulletin written by and published by . This book was released on 1983 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
- Author : Roy Ernest Anderson
- Publisher :
- Release : 1980
- ISBN :
- Pages : 36 pages
Notes on Cenozoic Structural History of the Tunnel Spring Mountains Area Western Millard County Utah
Download or read book Notes on Cenozoic Structural History of the Tunnel Spring Mountains Area Western Millard County Utah written by Roy Ernest Anderson and published by . This book was released on 1980 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mineral Resources of the Blitzen River Wilderness Study Area Harney County Oregon written by and published by . This book was released on 1988 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Late Cenozoic Structure and Evolution of the Great Basin Sierra Nevada Transition written by John S. Oldow and published by Geological Society of America. This book was released on 2009 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geological Survey Bulletin written by and published by . This book was released on 1949 with total page 1128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book SP007 Bibliography of Nevada geology and mineral resources through 1980 an alphabetical listing by author written by and published by NV Bureau of Mines & Geology. This book was released on with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report Nevada Bureau of Mines and Geology written by Nevada Bureau of Mines and Geology and published by . This book was released on 1978 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cenozoic Stratigraphy Structure and Mineralization in the Mojave Desert written by and published by . This book was released on 1986 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cenozoic Stratigraphy of the Owyhee Region Southeastern Oregon written by and published by . This book was released on 1965 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of North American Geology written by and published by . This book was released on 1966 with total page 1126 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1919/28 cumulation includes material previously issued in the 1919/20-1935/36 issues and also material not published separately for 1927/28. 1929/39 cumulation includes material previously issued in the 1929/30-1935/36 issues and also material for 1937-39 not published separately.
Download or read book Abstracts of North American Geology written by Geological Survey (U.S.) and published by . This book was released on 1967 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by and published by . This book was released on 1970 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Revisions to the Cenozoic Stratigraphy of Harney Basin Southeastern Oregon written by George Walton Walker and published by . This book was released on 1979 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
