Download or read book Volcanic and Nonmarine Stratigraphy of Southwest Isla Tiburon Gulf of California Mexico written by Jay Robert Neuhaus and published by . This book was released on 1989 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Southwestern Isla Tiburon (SWIT), Gulf of California, Mexico, is an area approximately 30 square kilometers, containing sedimentary and volcanic strata which are predominantly Early and Middle Miocene in age. A fossiliferous marine conglomerate on SWIT is believed the oldest marine deposit in the Gulf of California region, and supports the conclusion that a marine protogulf existed 15 to 8 Ma. K-Ar ages from this and previous studies provide a time constraint on the deposition of the marine conglomerate and the overall volcanic history of SWIT. Dips of beds suggest listric faulting occurred throughout much of the Miocene: Redbeds dip 40-50°N, basalt flows 23oN, conglomerates 20oN, and an ignimbrite 5oNW. A fault along Arroyo II displays right-lateral, strike slip and may be related to the La Cruz Fault which trends NW-SE along the southwest end of the island. In the late Cretaceous-early Tertiary, SWIT was part of the arc system along the western margin of the North American Plate. At this time, SWIT was adjacent to northeastern Baja California. In the Early Miocene Basin and Range extension led to the formation of small trough-shaped basins, and fluvio-lacustrine deposition resulted. Volcanic and roof pendant debris was shed into small basins on SWIT from the north. At 21-19 Ma andesitic volcanism occurred and a volcanic collapse structure formed which was later filled with andesitic lahar. The andesitic magma apparently formed out of a primary melt of the lower crust. From 19-16 Ma basaltic volcanism was dominant on SWIT and both tabular flows and ring dikes developed. The basalt of SWIT is alkalic olivine-augite, is high in incompatible elements and is similar to Early and Middle Miocene basalts of the Imperial Valley-northeastern Baja California region. Dacitic pyroclastic volcanism followed basaltic volcanism on SWIT, and between 14 and 11 Ma a protogulf developed which was filled with pyroclastic and conglomerate debris. At 11 Ma volcanism on SWIT became predominantly rhyolitic. First, rhyolite ignimbrite extruded, and, in the late Miocene, rhyolite pods, coulees, and crystal dikes developed. In the early Pliocene a dacitic ignimbrite with a tholeiitic character extruded reflecting conditions associated with modern Gulf of California rifting and seafloor spreading.

Download or read book Marine Stratigraphy and Paleontology of Southwest Isla Tiburon Gulf of California Mexico written by Michael Edward Cassidy and published by . This book was released on 1990 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tectonic Evolution of Northwestern M xico and the Southwestern USA written by Scott E. Johnson and published by Geological Society of America. This book was released on 2003 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stratigraphy and Correlation for the Ancient Gulf of California and Baja California Peninsula Mexico written by Ana Luisa Carreño and published by . This book was released on 2007 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Geological Survey Professional Paper written by and published by . This book was released on 1984 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stratigraphy and Correlation for the Ancient Gulf of California and Baja California Peninsula Mexico Classic Reprint written by Ana Luisa Carreño and published by Forgotten Books. This book was released on 2018-01-08 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Stratigraphy and Correlation for the Ancient Gulf of California and Baja California Peninsula, Mexico Other early references to Baja California geology are contained in the papers Of Lindgren (1888, 1889, Emmons and Merrill Willis and stose Darton and Bose and Wittich Nelson (1921) provided a good overview Of the ear liest surveys, natural history, roads, trails and ranchos in his report on the biological survey of 1905 - 1906. Access for these early Baja California expeditions was by boat and by pack animals; the Transpeninsular Highway (mexico 1) from Tijuana to La Paz was not completely paved until December 1973. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Download or read book Geological Survey Professional Paper written by Geological Survey (U.S.) and published by . This book was released on 1991 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petroleum Abstracts Literature and Patents written by and published by . This book was released on 1990 with total page 1416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cenozoic Giant Pectinids from California and the Tertiary Caribbean Province written by Judith Terry Smith and published by . This book was released on 1991 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thirty-nine taxa, many of them index species, are described and illustrated; their biostratigraphic and chronostratigraphic significance are related to tectnostratigraphic settings.

Download or read book The Gulf of California written by Richard C. Brusca and published by University of Arizona Press. This book was released on 2010-04-15 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Few places in the world can claim such a diversity of species as the Gulf of California (Sea of Cortez), with its 6,000 recorded animal species estimated to be half the number actually living in its waters. So rich are the Gulf's water that over a half-million tons of seafood are taken from them annuallyÑand this figure does not count the wasted by-catch, which would triple or quadruple that tonnage. This timely book provides a benchmark for understanding the Gulf's extraordinary diversity, how it is threatened, and in what ways it isÑor should beÑprotected. In spite of its dazzling richness, most of the Gulf's coastline now harbors but a pale shadow of the diversity that existed just a half-century ago. Recommendations based on sound, careful science must guide Mexico in moving forward to protect the Gulf of California. This edited volume contains contributions by twenty-four Gulf of California experts, from both sides of the U.S.-Mexico border. From the origins of the Gulf to its physical and chemical characteristics, from urgently needed conservation alternatives for fisheries and the entire Gulf ecosystem to information about its invertebrates, fishes, cetaceans, and sea turtles, this thought-provoking book provides new insights and clear paths to achieve sustainable use solidly based on robust science. The interdisciplinary, international cooperation involved in creating this much-needed collection provides a model for achieving success in answering critically important questions about a precious but rapidly disappearing ecological treasure.

Download or read book Anza Borrego Desert Region written by Diana Lindsay and published by Wilderness Press. This book was released on 2010-05-10 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: Now in its expanded 5th edition, The Anza-Borrego Desert Region offers complete coverage of the over 1 million acres of desert lands, including Anza-Borrego State Park, Ocotillo Wells State Vehicular Recreation Area (OWSVRA), parts of the Santa Rosa and San Jacinto Mountains National Monument, and adjacent BLM recreational and wilderness lands.

Download or read book Geology of the San Francisco Bay Region written by Doris Sloan and published by Univ of California Press. This book was released on 2006-06-27 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: "You can't really know the place where you live until you know the shapes and origins of the land around you. To feel truly at home in the Bay Area, read Doris Sloan's intriguing stories of this region's spectacular, quirky landscapes."—Hal Gilliam, author of Weather of the San Francisco Bay Region "This is a fascinating look at some of the world's most complex and engaging geology. I highly recommend this book to anyone interested in an understanding of the beautiful landscape and dynamic geology of the Bay Area."—Mel Erskine, geological consultant "This accessible summary of San Francisco Bay Area geology is particularly timely. We are living in an age where we must deal with our impact on our environment and the impact of the environment on us. Earthquake hazards, and to a lesser extent landslide hazards, are well known, but the public also needs to be aware of other important engineering and environmental impacts and geologic resources. This book will allow Bay Area residents to make more intelligent decisions about the geological issues affecting their lives."—John Wakabayashi, geological consultant

Download or read book Neogene Stratigraphy of the Fish Creek Vallecito Section Southern California written by Charles David Winker and published by . This book was released on 1987 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Submarine Mass Movements and Their Consequences written by Yasuhiro Yamada and published by Springer Science & Business Media. This book was released on 2011-10-13 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt: Submarine mass movements represent major offshore geohazards due to their destructive and tsunami-generation potential. This potential poses a threat to human life as well as to coastal, nearshore and offshore engineering structures. Recent examples of catastrophic submarine landslide events that affected human populations (including tsunamis) are numerous; e.g., Nice airport in 1979, Papua-New Guinea in 1998, Stromboli in 2002, Finneidfjord in 1996, and the 2006 and 2009 failures in the submarine cable network around Taiwan. The Great East Japan Earthquake in March 2011 also generated submarine landslides that may have amplified effects of the devastating tsunami. Given that 30% of the World’s population live within 60 km of the coast, the hazard posed by submarine landslides is expected to grow as global sea level rises. This elevated awareness of the need for better understanding of submarine landslides is coupled with great advances in submarine mapping, sampling and monitoring technologies. Laboratory analogue and numerical modeling capabilities have also developed significantly of late. Multibeam sonar, 3D seismic reflection, and remote and autonomous underwater vehicle technologies provide hitherto unparalleled imagery of the geology beneath the oceans, permitting investigation of submarine landslide deposits in great detail. Increased and new access to drilling, coring, in situ measurements and monitoring devices allows for ground-thruth of geophysical data and provides access to samples for geotechnical laboratory experiments and information on in situ strength and effective stress conditions of underwater slopes susceptible to fail. Great advances in numerical simulation techniques of submarine landslide kinematics and tsunami propagation, particularly since the 2004 Sumatra tsunami, have also lead to increased understanding and predictability of submarine landslide consequences. This volume consists of the latest scientific research by international experts in geological, geophysical, engineering and environmental aspects of submarine mass failure, focused on understanding the full spectrum of challenges presented by submarine mass movements and their consequences.

Download or read book Balkan Biodiversity written by Huw I. Griffiths and published by Springer Science & Business Media. This book was released on 2013-03-19 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first attempt to synthesize current understanding of biodiversity in the great European hot spot. A diverse group of international researchers offers perspective on biodiversity at the level of the gene, species and ecosystem, including contributions on temporal change. Biological groups include plants, mammals, spiders and humans, cave-dwelling organisms, fish, aquatic invertebrates and algae.

Download or read book Pacific Neogene written by Ryūichi Tsuchi and published by . This book was released on 1992 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Exploration of Marine Biodiversity written by Carlos M. Duarte and published by . This book was released on 2006 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: