Download or read book Interpretation of Magnetic Anomalies Observed at Sea written by Frederick John Vine and published by . This book was released on 1965 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plate Tectonics A Very Short Introduction written by Peter Molnar and published by Oxford University Press, USA. This book was released on 2015 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: La 4e de couv. indique : "The concept of plate tectonics is relatively new - it was only in the 1960s that the idea that continents drifted with respect to one another came to be accepted. Plate tectonics now forms one of geology's basic principles and explains much of the large-scale structure and phenomena we see on Earth today. In this Very Short Introduction Peter Molnar explores the impact that plate tectonics has had on our understanding of Earth : how the ocean floor forms, widens, and disappears ; why earthquakes and volcanoes are found in distinct zones ; and how the great mountain ranges of the world were built. As the Himalaya continues to grow, the Atlantic widens, and new ocean floor is forming, the mechanisms of plate tectonics continue to alter the surface of our planet."
Download or read book Magnetic Modeling of the Sea Floor written by Nancy Elizabeth Bowers and published by . This book was released on 2003 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis and Interpretation of Magnetic Anomalies Observed in North central California written by JoAnne L. Huppunen and published by . This book was released on 1983 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: To assist in the assessment of the geothermal potential of north-central California and to aid in defining the geologic transitions between the physiographic provinces of the Klamath Range, the Cascade Range, the Modoc Plateau, the Great Valley, and the Sierra Nevada Range, personnel from the Geophysics Group in the College of Oceanography at Oregon State University conducted a detailed aeromagnetic survey extending from 40°15' to 42°00'N latitude and from 120°45' to l22°45'W longitude. Two forms of spectral analysis, the energy spectrum and the exponential methods, were used to make source-top and source-bottom depth calculations. The magnetic source-bottom depths were interpreted as Curie-point isotherm depths. Based on the energy spectrum analysis, several regions with elevated Curie-point isotherm depths were mapped: (1) the Secret Spring Mountain-National Lava Beds Monument area, (2) the Mount Shasta area, (3) the Big Valley Mountains area, and (4) an area northeast of Lassen Peak. The elevated Curie-point isotherm depths within these areas, as shallow as 4 to 7 km below sea level (BSL) in the Secret Spring Mountain-National Lava Beds Monument area, the Mount Shasta area, and the area northeast of Lassen Peak, and 4 to 6 km BSL in the Big Valley Mountains area, imply vertical temperature gradients in excess of 70°C/km and heat flow greater than 100 mW/m2 when assuming a Curie-point temperature of 580°C. Shallow source-bottom depths of 4 to 5 km BSL were mapped in the Eddys Mountain area and interpreted to be the depth of a lithologic contact. Source-top depths show that the magnetic basement varies from about 3.5 km BSL, beneath the sedimentary assemblages of the Great Valley and the eastern Klamath Range, to near sea level in the Cascade Range. The exponential approximation method yielded source-bottom depths which agreed, in general, with depths determined by the energy spectrum method. However, this method appears less reliable and its depth estimates less accurate compared to the energy spectrum method. A broad negative anomaly, observed on the total field magnetic intensity map and low-pass filtered anomaly maps, suggests the sedimentary rocks of the Klamath Complex underlie Mount Shasta and the Medicine Lake Highlands. Magnetic lineations are oriented mainly NW.
Download or read book Encyclopedia of Scientific Dating Methods written by W. Jack Rink and published by Springer. This book was released on 2015-08-15 with total page 978 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides an overview of (1) the physical and chemical foundations of dating methods and (2) the applications of dating methods in the geological sciences, biology, and archaeology, in almost 200 articles from over 200 international authors. It will serve as the most comprehensive treatise on widely accepted dating methods in the earth sciences and related fields. No other volume has a similar scope, in terms of methods and applications and particularly time range. Dating methods are used to determine the timing and rate of various processes, such as sedimentation (terrestrial and marine), tectonics, volcanism, geomorphological change, cooling rates, crystallization, fluid flow, glaciation, climate change and evolution. The volume includes applications in terrestrial and extraterrestrial settings, the burgeoning field of molecular-clock dating and topics in the intersection of earth sciences with forensics. The content covers a broad range of techniques and applications. All major accepted dating techniques are included, as well as all major datable materials.
Download or read book The Continental Drift Controversy written by Henry R. Frankel and published by Cambridge University Press. This book was released on 2012-04-26 with total page 493 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the expansion of the land-based paleomagnetic case for drifting continents and recounts the golden age of marine geoscience.
Download or read book The Magnetic Field of the Earth s Lithosphere written by R. A. Langel and published by Cambridge University Press. This book was released on 1998-07-13 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 1998 book documents the collection, processing and analysis of satellite magnetic field data.
Download or read book Interpretations of Magnetic Anomalies Over the Mid Atlantic Ridge Between 42 N and 47 N written by Peter Richard Vogt and published by . This book was released on 1963 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Earth s Crust and Upper Mantle written by Pembroke J. Hart and published by American Geophysical Union. This book was released on 1969 with total page 801 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fine scale Topography and Magnetic Anomalies of the Deep Sea Floor Off Southern California written by Michael Samuel Loughridge and published by . This book was released on 1967 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first survey of a portion of the Pacific sea floor by means of deeply towed instruments was made in July 1965. The area surveyed off California near 123 deg 10 min W and 32 deg 40 min N was previously thought to be one of typical abyssal hills at a depth of approximately 4000 meters. Observations of the fine-scale topography and total magnetic field intensity were made with a narrow-beam echo-sounder and proton magnetometer towed within 300-500 meters of the sea floor. These observations show that the topography exhibits a linear trend in a direction which parallels the well-known Mason-Raff magnetic trends. In a direction perpendicular to this trend, the topography has a gently undulatory character with a recurrence wavelength of approximately 0.4 sq km and relief of approximately 100 meters. Speculative interpretations of the topography and magnetics are given which discuss their origin, preservation, and possible relationships to other crustal features. Instrumentation and acoustic navigation techniques are also described. (Author).
Download or read book Encyclopedia of Geomagnetism and Paleomagnetism written by David Gubbins and published by Springer Science & Business Media. This book was released on 2007-07-19 with total page 1061 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference encompasses the fields of Geomagnetism and Paleomagnetism in a single volume. Both sciences have applications in navigation, in the search for minerals and hydrocarbons, in dating rock sequences, and in unraveling past geologic movements such as plate motions they have contributed to a better understanding of the Earth. The book describes in fine detail the current state of knowledge and provides an up-to-date synthesis of the most basic concepts. It is an indispensable working tool not only for geophysicists and geophysics students but also for geologists, physicists, atmospheric and environmental scientists, and engineers.
Download or read book An Interpretation of the Gravity and Magnetic Anomalies of the Rivera Fracture Zone Eastern Pacific Ocean written by William Harold Gumma and published by . This book was released on 1974 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Continental Drift Controversy written by Henry R. Frankel and published by Cambridge University Press. This book was released on 2012-04-26 with total page 697 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the expansion of the land-based paleomagnetic case for drifting continents and recounts the golden age of marine geoscience.
Download or read book The Continental Drift Controversy Volume 4 Evolution into Plate Tectonics written by Henry R. Frankel and published by Cambridge University Press. This book was released on 2012-04-26 with total page 697 pages. Available in PDF, EPUB and Kindle. Book excerpt: The resolution of the sixty-year debate over continental drift, culminating in the triumph of plate tectonics, changed the very fabric of Earth science. This four-volume treatise on the continental drift controversy is the first complete history of the origin, debate and gradual acceptance of this revolutionary theory. Based on extensive interviews, archival papers and original works, Frankel weaves together the lives and work of the scientists involved, producing an accessible narrative for scientists and non-scientists alike. This fourth volume explains the discoveries in the mid 1960s which led to the rapid acceptance of seafloor spreading theory and how the birth of plate tectonics followed soon after with the geometrification of geology. Although plate tectonics did not explain the cause or dynamic mechanism of drifting continents, it provided a convincing kinematic explanation that continues to inspire geodynamic research to the present day.
Download or read book Geomagnetic Observations and Models written by M. Mandea and published by Springer Science & Business Media. This book was released on 2010-12-10 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides comprehensive and authoritative coverage of all the main areas linked to geomagnetic field observation, from instrumentation to methodology, on ground or near-Earth. Efforts are also focused on a 21st century e-Science approach to open access to all geomagnetic data, but also to the data preservation, data discovery, data rescue, and capacity building. Finally, modeling magnetic fields with different internal origins, with their variation in space and time, is an attempt to draw together into one place the traditional work in producing models as IGRF or describing the magnetic anomalies.
Download or read book Observations Modeling and Systems Analysis in Geomagnetic Data Interpretation written by Alexei Gvishiani and published by Springer Nature. This book was released on 2020-09-17 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geomagnetic field penetrates through all shells of the solid Earth, hydrosphere and atmosphere, spreading into space. The Earth Magnetic Field plays a key-role in major natural processes. Geomagnetic field variations in time and space provide important information about the state of the solid Earth, as well as the solar-terrestrial relationships and space weather conditions. The monograph presents a set of fundamental and, at the same time, urgent scientific problems of modern geomagnetic studies, as well as describes the results of the authors’ developments. The new technique introduced in the book can be applied far beyond the limits of Earth sciences. Requirements to corresponding data models are formulated. The conducted experimental investigations are combined with development and implementation of new methods of mathematical modeling, artificial intelligence, systems analysis and data science to solve the fundamental problems of geomagnetism. At that, formalism of Big Data and its application to Earth Sciences is presented as essential part of systems analysis. The book is intended for research scientists, tutors, students, postgraduate students and engineers working in geomagnetism and Earth sciences in general, as well as in other relevant scientific disciplines.
Download or read book Potential Applications of Magnetic Gradients to Marine Geophysics written by William Ernest Byrd (Jr.) and published by . This book was released on 1967 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chapter I is a consideration of the application of magnetic gradients to marine geophysics and it shows that gradients are well-suited to the investigation of sea floor structure. Gradients may be utilized in the following areas of study: investigation of magnetic anomaly fine structure; delineation of geologic contact position and orientation; estimation of depth to source and source type; and determination of magnetization direction from topographic effects. This chapter also discusses the requirements for a marine magnetic gradiometer and proposes a system utilizing two Zeeman effect sensors in a stable vertical towed array. It also includes investigation of error sources and means for their correction or reduction. Chapter II reviews present knowledge and theory of ocean ridge structure, with emphasis on the characteristic magnetic anomalies observed over the ridges. We propose that these anomalies arise from a sub-horizontal layered structure composed of basaltic flows which have originated in the ridge's axial region. Included in this presentation is a sub-horizontal layered model of the Reykjanes Ridge. Computed magnetic anomaly profiles over this model correlate well with observed profiles taken from a survey by Heirtzler.
