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Unusual Central Nevada Geologic Terranes Produced By Late Devonian Antler Orogeny And Alamo Impact
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Book Synopsis Unusual Central Nevada Geologic Terranes Produced by Late Devonian Antler Orogeny and Alamo Impact by : Forrest G. Poole
Download or read book Unusual Central Nevada Geologic Terranes Produced by Late Devonian Antler Orogeny and Alamo Impact written by Forrest G. Poole and published by Geological Society of America. This book was released on 2015-10-08 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This volume is the product of nearly 25 years of geologic investigations. It is an exposition of two small areas, both less than 25 km from the front of the Mississippian Roberts Mountains thrust, but each displaying a different, unique geologic terrane, previously undocumented in Nevada and perhaps in North America"--
Book Synopsis Devonian Climate, Sea Level and Evolutionary Events by : R. T. Becker, 1st
Download or read book Devonian Climate, Sea Level and Evolutionary Events written by R. T. Becker, 1st and published by Geological Society of London. This book was released on 2016-10-20 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: The geological and palaeontological records of climate change and evolutionary events reflect Earth’s widely fluctuating climate systems. Past climates hold the clues to understanding future developments. In this context, research on linked climate, biodiversity and sea-level fluctuations of the Devonian contributes to the general knowledge of deep-time climate dynamics. A fruitful co-operation between the International Geoscience Programme IGCP 596 and the International Subcommission on Devonian Stratigraphy (SDS) addressed the complex succession of climate-linked Devonian global events of varying magnitude. The primary goal of IGCP 596 was to assess mid-Palaeozoic climate changes and their impact on marine and terrestrial biodiversity using an interdisciplinary approach. The focus of SDS includes a revision of the eustatic sea-level curve and the integration of refined chrono- and biostratigraphy with modern chemo-, magneto-, cyclo-, event- and sequence stratigraphy. This enabled the much improved dating and correlation of abiotic perturbations, evolutionary changes, organism and ecosystem ranges. Results by 37 authors are presented in 14 chapters, which cover the entire Devonian.
Book Synopsis An Alternative Hypothesis for the Mid-Paleozoic Antler Orogeny in Nevada by : Keith Brindley Ketner
Download or read book An Alternative Hypothesis for the Mid-Paleozoic Antler Orogeny in Nevada written by Keith Brindley Ketner and published by Geological Survey (USGS). This book was released on 2012 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: A great volume of Mississippian orogenic deposits supports the concept of a mid-Paleozoic orogeny in Nevada, and the existence and timing of that event are not questioned here. The nature of the orogeny is problematic, however, and new ideas are called for. The cause of the Antler orogeny, long ascribed to plate convergence, is here attributed to left-lateral north-south strike-slip faulting in northwestern Nevada. The stratigraphic evidence originally provided in support of an associated regional thrust fault, the Roberts Mountains thrust, is now known to be invalid, and abundant, detailed map evidence testifies to post-Antler ages of virtually all large folds and thrust faults in the region. The Antler orogeny was not characterized by obduction of the Roberts Mountains allochthon; rocks composing the "allochthon" essentially were deposited in situ. Instead, the orogeny was characterized by appearance of an elongate north-northeast-trending uplift through central Nevada and by two parallel flanking depressions. The eastern depression was the Antler foreland trough, into which sediments flowed from both east and west in the Mississippian. The western depression was the Antler hinterland trough into which sediments also flowed from both east and west during the Mississippian. West of the hinterland trough, across a left-lateral strike-slip fault, an exotic landmass originally attached to the northwestern part of the North American continent was moved southward 1700 km along a strike-slip fault. An array of isolated blocks of shelf carbonate rocks, long thought to be autochthonous exposures in windows of the Roberts Mountains allochthon, is proposed here as an array of gravity-driven slide blocks dislodged from the shelf, probably initiated by the Late Devonian Alamo impact event.
Book Synopsis Pennsylvanian to Cretaceous Folds and Thrusts in South-central Nevada by : Angela Giovanna Russo
Download or read book Pennsylvanian to Cretaceous Folds and Thrusts in South-central Nevada written by Angela Giovanna Russo and published by . This book was released on 2013 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding Permian and Mesozoic contractional structures from southern California to northern Nevada requires correlation through south-central Nevada. After the Devonian-Mississippian Antler orogeny through the Permian-Triassic Sonoma orogeny and then up to the Sevier orogeny, south-central Nevada was thought to have remained tectonically inactive. However, Pennsylvanian through Jurassic age deformation is documented to the south in Death Valley and to the north. Identifying geometries, spatial relationships, and relative timing of deformations in the Timpahute Range, south-central Nevada, is an essential piece to completing the overall understanding of Nevada geology. The purpose of this study is to identify and analyze deformational structures of the Timpahute Range and clarify their geometries, relative timing, regional correlation, and tectonic significance. All contraction in the Timpahute Range is constrained by Antler foreland basin units and the intrusion of the 102.9 ± 3.2 Ma Lincoln stock. New mapping at a scale of 1:12,000 documents three contractional episodes in the Timpahute Range, and cross-cutting relations from this study determine at least a relative timeline. The Tempiute Ridge Block contains a W-vergent fold that represents the earliest contractional event in the area. Next was the W-vergent Schofield Pass fault zone. The last contractional deformation formed E-vergent structures of the Central Nevada thrust belt which make up the Lincoln duplex. In collisional orogens, closely related thrust faults may join together in a fault system that includes such structures such as imbricate fans and duplexes. The Lincoln duplex, part of the Central Nevada thrust belt exposed in the Timpahute Range and southern Worthington Mountains, consists of folds and a sequence of thrust faults. New data suggest the Lincoln duplex is a variation of the hinterland dipping duplex, with out-of-sequence thrusts. Cenozoic extensional faults overprint the contractional structures. A series of NW-striking normal faults terminate at a major ENE-striking left-lateral strike-slip fault. This fault continues eastward through multiple ranges in south-central Nevada as part of the Timpahute lineament.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1989 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geology of the Willow Creek Area, Elko County, Nevada by : John H. Whitaker
Download or read book Geology of the Willow Creek Area, Elko County, Nevada written by John H. Whitaker and published by . This book was released on 1985 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to test two hypotheses. The first hypothesis interprets allochthonous rocks in the Willow Creek area of the Pinyon Range as lying on flat, superficial thrusts that truncate the underlying folded Mississippian rocks of the Antler flysch sequence. The second hypothesis interprets the allochthonous rocks as being folded within the Mississippian sequence as if they had arrived as part of the Antler allochthon after flysch sedimentation had begun and were overlapped as sedimentation continued. Evidence presented here supports the second hypothesis. During Early and Middle Devonian time, deposition in the central Pinyon Range occurred in a miogeoclinal shallow-shelf environment characterized by carbonates of the Nevada Group. Onset of the Antler orogeny in Late Devonian time was marked by uplift and erosion or nondeposition in the study area. A west-dipping subduction zone formed to the west in oceanic crust, developing an accretionary wedge which became the Roberts Mountains allochthon. The allochthon was obducted onto the continent as incipient subduction of continental crust occurred. Downbending of the edge of the continent led to the formation of a foreland trough at the leading edge of the allochthon. Telescoping within the allochthon caused it to rise and shed siliciclastic sediments into the trough forming the submarine fan deposits of the Dale Canyon Formation. The allochthon was then emplaced over the Dale Canyon Formation and was subsequently overlapped by deltaic sediments of the Diamond Peak Formation. The Roberts Mountains allochthon in the Willow Creek area consists of the Devonian Woodruff Formation forming its base, the Ordovician Vinini Formation at the top, with a small slice of the Siluro-Devonian Roberts Mountains Formation lying in between. Emplacement of the allochthon is dated as during or before typicus Zone time of the early Osagean on the basis of conodont collections from the overlapping Diamond Peak Formation.
Book Synopsis Ancient Landscapes of Western North America by : Ronald C. Blakey
Download or read book Ancient Landscapes of Western North America written by Ronald C. Blakey and published by Springer. This book was released on 2017-10-03 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Allow yourself to be taken back into deep geologic time when strange creatures roamed the Earth and Western North America looked completely unlike the modern landscape. Volcanic islands stretched from Mexico to Alaska, most of the Pacific Rim didn’t exist yet, at least not as widespread dry land; terranes drifted from across the Pacific to dock on Western Americas’ shores creating mountains and more volcanic activity. Landscapes were transposed north or south by thousands of kilometers along huge fault systems. Follow these events through paleogeographic maps that look like satellite views of ancient Earth. Accompanying text takes the reader into the science behind these maps and the geologic history that they portray. The maps and text unfold the complex geologic history of the region as never seen before. Winner of the 2021 John D. Haun Landmark Publication Award, AAPG-Rocky Mountain Section
Book Synopsis Megabreccias and Impact Breccias of East Central Nevada by : Steve Foster
Download or read book Megabreccias and Impact Breccias of East Central Nevada written by Steve Foster and published by . This book was released on 2004-08-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2004 NPS field trip concentrates on breccias in the Great Basin. Breccias are significant reservoirs in many petroleum basins worldwide. The oil production at Eagle Springs, Nevada's first field, and in one of the states newest fields, Ghost Ranch, apparently comes from a landslide breccia. The Great Basin breccias are of three types. The first is impact breccias. Dr. John Warme and his colleagues from the Colorado School of Mines and the United State Geological Survey have compiled a substantial amount of evidence to confirm that an extraterrestrial impact occurred during deposition of the Middle Devonian Guilmette Formation. The effects of this collision can be seen over a wide area in Nye and Lincoln Counties. The breccia, named the Alamo Breccia, should provide an exceptional time line for correlations within that area. Additionally, the single graded bed might be a significant reservoir as well.The second type of potential reservoir is the collapse breccias developed during paleokarsting and paleocave development. Like the Alamo Breccia, the collapse breccias also occur in the Devonian Guilmette Formation. To date, the collapse breccias have been identified in northern Nye County and southern Eureka and White Pine Counties and are probably related to a forebulge developed by the Antler Orogeny. Should the associated paleocaves be open in the subsurface and oil filled, they could have astounding production potential like those of the fields in west Texas.The last type of Great Basin breccia to be considered is landslide breccias. These are not "potential reservoirs" but are actual features that can be found in both Eagle Springs and Ghost Ranch Fields. Like the previous two types, these also involve the Devonian Guilmette Formation as well as the Pennsylvanian Ely Limestone. As such, they are real, proven exploration targets in the Great Basin.
Book Synopsis Applications of Non-Pollen Palynomorphs by : F. Marret
Download or read book Applications of Non-Pollen Palynomorphs written by F. Marret and published by Geological Society of London. This book was released on 2021-10-29 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: This long-awaited book about non-pollen palynomorphs (NPPs) aims to cover gaps in our knowledge of these abundant but understudied palynological remains. NPPs, such as fungal spores, testate amoebae, dinoflagellate cysts, acritarchs and animal remains, are routinely recovered from palynological preparations of marine or terrestrial material, from Proterozoic to recent geological times. This book gives the reader a comprehensive overview of the different types of NPPs, with examples from diverse time periods and environments. It provides guidance on sample preparation to maximize the recovery of these NPPs, detailed information on their diversity and ecological affinity, clarification on the nomenclature and demonstrates their value as environmental indicators. This volume will become the reference guide for any student, academic or practitioner interested in everything else in their palynological preparations.
Book Synopsis Roadside Geology of Nevada by : Frank DeCourten
Download or read book Roadside Geology of Nevada written by Frank DeCourten and published by Roadside Geology. This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Silver State has some of the most diverse geology in the United States, and much of it lies in plain sight thanks to the arid climate of the Great Basin. --Publisher.
Book Synopsis Regional Stratigraphy of North America by : W.J. Frazier
Download or read book Regional Stratigraphy of North America written by W.J. Frazier and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt: An early reviewer of this book stated that he had difficulty assessing its marketability because it "falls between the cracks" of geological literature. We have designed this book to meet a need of modem geology: namely, a single source providing both detailed and synoptic stratigraphy of the various regions of North America, through geological time. Shortly after beginning work on such a book, we realized why it had not yet been written: it required six years of effort, assimilation of an incredible amount of information, and two years' additional work to cut the volume down to publishable size. Further, by the time the final chapter was written, the fIrst few were already out of date. Nevertheless, the book lies in front of you. It is intended to serve several purposes. As a textbook, it will serve the following courses: • Regional stratigraphy • Sedimentary tectonics • Regional tectonics • Advanced historical geology • Survey-level paleontology Obviously, not all portions of the book are relevant to all of the above courses. We assume the reader will retain this book after the particular course is done, and will use it as a reference book. Hopefully, others will obtain the book solely for reference purposes. We believe it will be especially useful for the working geologist or academic geologist seeking generalized and some moderately detailed information about a region or geological time interval which is unfamiliar.
Book Synopsis The Evolution of Sedimentary Basins by : Peter Kent
Download or read book The Evolution of Sedimentary Basins written by Peter Kent and published by . This book was released on 1982 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Anagram Solver by : Bloomsbury Publishing
Download or read book Anagram Solver written by Bloomsbury Publishing and published by Bloomsbury Publishing. This book was released on 2009-01-01 with total page 719 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anagram Solver is the essential guide to cracking all types of quiz and crossword featuring anagrams. Containing over 200,000 words and phrases, Anagram Solver includes plural noun forms, palindromes, idioms, first names and all parts of speech. Anagrams are grouped by the number of letters they contain with the letters set out in alphabetical order so that once the letters of an anagram are arranged alphabetically, finding the solution is as easy as locating the word in a dictionary.
Book Synopsis Geological Survey Research, 1975 by : Geological Survey (U.S.)
Download or read book Geological Survey Research, 1975 written by Geological Survey (U.S.) and published by . This book was released on 1975 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geologic History of Utah by : Bart Kowallis
Download or read book Geologic History of Utah written by Bart Kowallis and published by . This book was released on 2021-12 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: A field guide for professional and student geologists working in Utah. The book contains detailed stratigraphic correlation tables and charts of strata across the State of Utah as well as a description of the geologic history of the state.
Book Synopsis The Mojave-Sonora Megashear Hypothesis by : Thomas Howard Anderson
Download or read book The Mojave-Sonora Megashear Hypothesis written by Thomas Howard Anderson and published by Geological Society of America. This book was released on 2005-01-01 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crossword Lists written by Anne Stibbs and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
