Download or read book Structural Analysis and Chronologic Constraints on Progressive Deformation within the Rincon Mountains Arizona written by George H. Davis and published by Geological Society of America. This book was released on 2023-08-28 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Requiem for the Santa Cruz written by Robert H. Webb and published by University of Arizona Press. This book was released on 2021-11-30 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: In prehistoric times, the Santa Cruz River in what is now southern Arizona saw many ebbs, flows, and floods. It flowed on the surface, meandered across the floodplain, and occasionally carved deep channels or arroyos into valley fill. Groundwater was never far from the surface, in places outcropping to feed marshlands or ciénegas. In these wet places, arroyos would heal quickly as the river channel revegetated, the thriving vegetation trapped sediment, and the channel refilled. As readers of Requiem for the Santa Cruz learn, these aridland geomorphic processes also took place in the valley as Tucson grew from mud-walled village to modern metropolis, with one exception: historical water development and channel changes proceeded hand in glove, each taking turns reacting to the other, eventually lowering the water table and killing a unique habitat that can no longer recover or be restored. Authored by an esteemed group of scientists, Requiem for the Santa Cruz thoroughly documents this river—the premier example of historic arroyo cutting during the late nineteenth and early twentieth centuries, when large floodflows cut down through unconsolidated valley fill to form deep channels in the major valleys of the American Southwest. Each chapter provides a unique opportunity to chronicle the arroyo legacy, evaluate its causes, and consider its aftermath. Using more than a collective century of observations and collections, the authors reconstruct the circumstances of the river’s entrenchment and the groundwater mining that ultimately killed the marshlands, a veritable mesquite forest, and a birdwatcher's paradise. Today, communities everywhere face this conundrum: do we manage ephemeral rivers through urban areas for flood control, or do we attempt to restore them to some previous state of perennial naturalness? Requiem for the Santa Cruz carefully explores the legacies of channel change, groundwater depletion, flood control, and nascent attempts at river restoration to give a long-term perspective on management of rivers in arid lands. Tied together by authors who have committed their life’s work to the study of aridland rivers, this book offers a touching and scientifically grounded requiem for the Santa Cruz and every southwestern river.

Download or read book Geologic Excursions in Southwestern North America written by Philip A. Pearthree and published by . This book was released on 2019 with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book United States Geological Survey Yearbook written by Geological Survey (U.S.) and published by . This book was released on 1980 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tectonic Setting of Faulted Tertiary Strata Associated with the Catalina Core Complex in Southern Arizona written by William R. Dickinson and published by Geological Society of America. This book was released on 1991 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mid-Tertiary strata exposed as tilted homoclines along the flanks of the San Pedro trough and across broad uplands north of the Catalina core complex are assigned to the following formations, each of which includes informal local members and facies: (a) Mineta Formation, mid-Oligocene redbeds including both conglomeratic fluvial and finer-grained lacustrine deposits; (b) Galiuro Volcanics, including lavas and domes, air-fall and ash-flow tuffs, and intercalated volcaniclastic strata of late Oligocene to earliest Miocene age; (c) Cloudburst Formation, also of late Oligocene and earliest Miocene age but including a sedimentary upper member of conglomeratic strata as well as a volcanic lower member correlative with part of the Galiuro Volcanics; and (d) San Manuel Formation, composed of lower Miocene alluvial fan and braidplain deposits that display contrasting clast assemblages in different areas of exposure. Generally correlative Oligocene-Miocene strata exposed south of the Catalina core complex are assigned to the Pantano Formation, which contains similar lithologic components. Less-deformed Neogene strata of post-mid-Miocene basin fill are assigned to the Quiburis Formation along the San Pedro trough, but stratigraphic equivalents elsewhere lack adequate nomenclature. High benchlands mantled by paleosols mark the highest levels of Neogene aggradation. Successive stages of subsequent erosional dissection are recorded by multiple terrace levels incised into basin fill. Key exposures of syntectonic mid-Tertiary sedimentary sequences in several local subareas reveal typical structural and stratigraphic relationships. Multiple fault blocks expose pre-Tertiary bedrock overlain by tilted mid-Tertiary strata confined to intervening half-grabens. Bounding syndepositional faults dip southwest and associated homoclines dip northeast. Fanning dips and buttress unconformities reflect progressive tilt and burial of eroding fault blocks. Dips of block-bounding faults are inversely proportional to the ages of the faults. Steeper dips for younger faults suggest either progressive erosion of successive listric faults or progressive rotation of successive planar faults. Uniformly moderate to steep dihedral angles between fault surfaces and offset homoclinal bedding imply that the faults dipped more steeply near the surface when syntectonic mid-Tertiary strata were subhorizontal. Although the inference of listric faulting best links apparent strands of the Catalina detachment system, the alternate interpretation of rotational normal faulting is compatible with local structural relationships including tilt of porphyry copper orebodies. Within the San Pedro trough, multiple homo clines of mid-Tertiary strata are exposed locally in tilt-blocks exhumed by Neogene erosion from beneath nearly flat-lying basin fill of the Quiburis Formation. Faults bounding the mid-Tertiary exposures include backtilted strands of the Catalina detachment system, somewhat younger listric or rotational normal faults, and steeper basin-range normal faults that display offsets both synthetic and antithetic to the flanks of the San Petro trough. In Cienega Gap, flanking the Tucson Basin, multiple tilt-blocks of the Pantano Formation form part of the upper plate of the Catalina detachment system. Initial construction of alluvial fans by generally westward paleoflow was followed by ponding of lacustrine environments along the foot of secondary breakaway scarps that also generated massive megabreccia deposits. In summary, syntectonic Oligocene to Miocene sedimentation succeeded a prominent pulse of polymodal mid-Tertiary volcanism and was coeval with mylonitic deformation and detachment faulting along the flank of the Catalina core complex. The headwall rupture for the detachment system migrated westward from an initial position along the range front of the Galiuro Mountains. After mid-Miocene time, accumulation and subsequent dissection of essentially undeformed basin fill was accompanied by basin-range block faulting. The most challenging structural issue is whether fault strands of the Catalina detachment system are interconnected or are disconnected rotational segments.

Download or read book Exposed Cross Sections of the Continental Crust written by M.H. Salisbury and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the Fall of 1988, 64 geologists and geophysicists from 11 countries met in Killarney, Ontario, on the north shore of Lake Huron to examine evidence that suggests that the continental crust is exposed in cross-section at several key locations on the Earth's surface. The meeting, which was held under NATO auspices as an Advanced Study Institute, was a landmark event in that it was the first time that many of the lead scientists working on these complexes in relative isolation around the world had' ever gathered together to compare results. The present volume is a compendium of the invited lectures given on the principle sections, plus an array of supporting papers on these and other sections as well as on related topics such as crustal emplacement mechanisms, deformation and rheology. Nearly all of the best known sections are represented, including the Ivrea Zone, Calabria, the Kapuskasing Zone, Fiordland and many others. It is our hope that this Volume will serve as a reference for Earth scientists who are trying to understand levels of the crust not normally exposed to view, as well as a point of departure for new research and a teaching aid to new entrants in this relatively new field of study.

Download or read book Tomographic Inversion of Complex Resistivity written by Andreas Kemna and published by . This book was released on 2000 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sedimentary Cover North American Craton U S written by L.L. Sloss and published by Geological Society of America. This book was released on with total page 525 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 'sedimentary cover' refers to the stratified rocks of youngest Proterozoic and Phanerozoic age that rest upon the largely crystalline basement rocks of the continental interior. This volume presents data and interpretations of the geophysics of the craton and summarizes the craton's tectonic evolution. It also presents the stratigraphy, structural history, and economic geology of specific sedimentary basins (e.g. Appalachian basin) and regions (e.g. Rocky Mountains). It concludes with a discussion of the currently popular theories of cratonal tectonics, & unresolved questions are identified.

Download or read book A Companion to Cultural Resource Management written by Thomas F. King and published by John Wiley & Sons. This book was released on 2011-03-29 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Companion to Cultural Resource Management is an essential guide to those wishing to gain a deeper understanding of CRM and heritage management. Expert contributors share their knowledge and illustrate CRM's practice and scope, as well as the core issues and realities in preserving cultural heritages worldwide. Edited by one of the world's leading experts in the field of cultural resource management, with contributions by a wide range of experts, including archaeologists, architectural historians, museum curators, historians, and representatives of affected groups Offers a broad view of cultural resource management that includes archaeological sites, cultural landscapes, historic structures, shipwrecks, scientific and technological sites and objects, as well as intangible resources such as language, religion, and cultural values Highlights the realities that face CRM practitioners "on the ground"

Download or read book Physical Geography written by Robert E. Gabler and published by Thomson Brooks/Cole. This book was released on 2008-07-15 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: PHYSICAL GEOGRAPHY, 9e, International Edition, uses the combined expertise of four respected geographers to show how Earth's physical geography impacts humans, and how humans impact Earth's physical geography. The text emphasizes three essential themes to demonstrate the major roles for the discipline -- Geography as a Physical Science, Geography as the Spatial Science, and Geography as Environmental Science. With a renewed focus on examining relationships and processes among Earth systems, this text will help you understand how the various systems interrelate and how humans are an integral aspect of geography. Historically the first book to take a conservation approach, the authors continue to emphasize the theme of environmental and human impacts.

Download or read book Cenozoic Paleogeography of the Western United States written by John M. Armentrout and published by . This book was released on 1979 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Encyclopedia of Water Politics and Policy in the United States written by Steven L. Danver and published by CQ Press. This book was released on 2011-05-17 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water has had an immeasurable impact on the history and growth of the United States. As an essential element of life water has been and remains a constant source of conflict and controversy as different constituencies fight for limited resources. The Encyclopedia of Water Politics and Policy in the United States is the most comprehensive reference source available that analyzes water-related issues in America. A diverse group of over 100 scholars have provided their research and analysis of why water is so significant by tracing its impact on issues like national and state boundaries, western migration, urbanization, and the economy. This volume chronicles the origins of present-day water problems, political conflicts, the impact of legislation and court decisions on the use of water resources, the major projects undertaken across the country, and what experts are proposing be done to preserve this basic component of the environment. Going back some 150 years, the Encyclopedia provides an overview of approximately 280 pieces of water-related legislation, legal cases, people, projects, and organizations that have shaped the history of the United States. In addition to historical coverage, the volume also addresses many current environmental issues including acid rain, agriculture, climate change, mining, erosion, levees and dams, pollution, urbanization, and wastewater treatment. The volume’s A to Z entries are divided into four sections: Regional Water Politics and Policy: Essays providing a narrative background and overview Major Issues in Water Politics and Policy: A comprehensive list of issues from colonial times to the present Law and Government: The people and legislation that have shaped water policy in the United States Places and Projects: Extensive coverage of the projects (including dams and aqueducts) the government has undertaken to develop the nation’s waterways Throughout the volume, concise text features highlight important events, advocacy groups, people, books, and sites important to water politics and policy. A thematic table of contents allows users to easily locate reclamation projects geographically, biographies of important figures, current issues by subject area, government agencies, and legal cases.

Download or read book New Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1989 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structural Geology Algorithms written by Richard Waldron Allmendinger and published by . This book was released on 2014-05-14 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Structural Geology has been taught, largely unchanged, for the last 50 years or more. The lecture part of most courses introduces students to concepts such as stress and strain, as well as more descriptive material like fault and fold terminology. The lab part of the course usually focuses on practical problem solving, mostly traditional me-thods for describing quantitatively the geometry of structures. While the lecture may introduce advanced concepts such as tensors, the lab commonly trains the student to use a combination of graphical methods like orthographic or spherical projection, as well as a variety of plane trigonometry solutions to various problems. This leads to a disconnect between lecture concepts that require a very precise understanding of coor-dinate systems (e.g., tensors) and lab methods that appear to have no common spatial or mathematical foundation. Students have no chance to understand that, for example, seemingly unconnected constructions like down-plunge projections and Mohr circles share a common mathematical heritage: they are both graphical representations of coordinate transformations"--Provided by publisher.

Download or read book Deformation Mechanisms Rheology and Tectonics written by Siese de Meer and published by Geological Society of London. This book was released on 2002 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: The motion and deformation of rocks are processes of fundamental importance in shaping the Earth, from outer crustal layers to the deep mantle. Reconstructions of the evolution of the Earth therefore require detailed knowledge of the geometry of deformation structures and their relative timing, of the motions leading to deformation structures and of the mechanisms governing these motions. This volume contains a collection of 22 papers on field, experimental and theoretical studies that add to our knowledge of these processes.

Download or read book By laws of the Board of Trustees written by Scranton (Pa.). Public library and published by . This book was released on 1891 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Winning While Losing written by Kenneth Alan Osgood and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores the relationship between race and the rise of conservativism in America and the political setbacks that remained in the way of attempts to remedy oppression and discrimination.