Author: John Charles Wallis
Publisher:
ISBN:
Category : Alluvium
Languages : en
Pages : 278

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Book Description

Author: Robert Michael Looney
Publisher:
ISBN:
Category : Colorado River (Colo.-Mexico)
Languages : en
Pages : 0

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Book Description
Ancient and modern flood plain and channel morphology was mapped in the late Quaternary alluvial valley of the Colorado River between Utley and La Grange, Texas. The analysis of N.A.S.A.-generated color aerial infrared photography, SKYLAB remote sensing imagery, and aerial panchromatic photography revealed nine assemblages of fluvial channel patterns. The paleochannels occur on multiple flood plain and terrace levels and are associated with deposits with variable textures, sedimentary structures, and lithologic composition. Quantitative geomorphic analysis showed that bankfull width for the late Quaternary Colorado River varied from 450 m to 200 m, meander wavelength from 575 m to 1730 m, and sinuosity from 1.3 to 3.6. The channel adjustments from low sinuosity to high sinuosity streams was accompanied by a decrease in meander wavelength and bankfull width. Sedimentological analyses show corresponding changes in grain size from sand and gravel to sand and silt transporting streams. The nine channel assemblages of the Colorado River reflect changes in runoff and sediment load characteristics from upstream catchment areas. These runoff and sediment load changes correlate with an alternating arid-humid climate in central Texas during the late Quaternary. The resulting hypothesis is that channel 7 is pre-Wisconsinan; channels 6, 6A, and 6B are Wisconsinan; channel 5 is a dry period at the beginning of the Holocene; channel 4 is a humid Holocene phase; and channel 3 to the modern channel are the most recent Holocene fluctuations. Sedimentary structures and paleo-hydrologic implications indicate that channels 7 and 6 were laid down by broad, shallow braided streams, Channels 6A and 5 were either braided or coarse meander belt fluvial systems. The small channel width, meander wavelength, and low sinuosity indicates that channels 6B and 4 operated as fine grained meander belt fluvial systems. Channels 3 and 2 are similar to the modern Colorado River which is a bed-load (high bed-load/discharge ratio) stream transporting coarse sand and pebble-to-cobble gravel

Author: Gulf Coast Association of Geological Societies
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 468

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Book Description

Author: Linda L. Nash
Publisher:
ISBN:
Category : Climatic changes
Languages : en
Pages : 138

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Book Description

Author: Paul Goldberg
Publisher: Springer Science & Business Media
ISBN: 1461511836
Category : Social Science
Languages : en
Pages : 519

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Book Description
This volume brings together contributions from an experienced group of archaeologists and geologists whose common objective is to present thorough and current reviews of the diverse ways in which methods from the earth sciences can contribute to archaeological research. Many areas of research are addressed here, including artifact analysis and sourcing, landscape reconstruction and site formation analysis, soil micromorphology and geophysical exploration of buried sites.

Author: Amanda R. Masterson
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 358

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Book Description

Author: G. Mathias Kondolf
Publisher: John Wiley & Sons
ISBN: 0470868325
Category : Science
Languages : en
Pages : 698

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Book Description
In recent years there has been a marked increase in funding andemployment in river restoration. Methods in Fluvial Geomorphologyprovides an integrated approach to the interdisciplinary nature ofthe subject and offers guidance for researchers and professionalson the tools available to answer questions on river management onvery difference scales. * Each chapter is organised to cover everything from generalconcepts to specific techniques * Topics covered include evolution of methods, guiding concepts, aframework for deciding when to apply specific tools, advantages andlimitation of the tools, sources of data, equipment and suppliesneeded, and a summary table * Provides the professional with a useful handbook covering alltools used in fluvial geomorphology * Also provides valuable information on the advantages andlimitations of the tools * All chapters include case studies to give examples of theapplications of the tools discussed

Author:
Publisher: Academic Press
ISBN: 0080885225
Category : Science
Languages : en
Pages : 6392

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Book Description
The changing focus and approach of geomorphic research suggests that the time is opportune for a summary of the state of discipline. The number of peer-reviewed papers published in geomorphic journals has grown steadily for more than two decades and, more importantly, the diversity of authors with respect to geographic location and disciplinary background (geography, geology, ecology, civil engineering, computer science, geographic information science, and others) has expanded dramatically. As more good minds are drawn to geomorphology, and the breadth of the peer-reviewed literature grows, an effective summary of contemporary geomorphic knowledge becomes increasingly difficult. The fourteen volumes of this Treatise on Geomorphology will provide an important reference for users from undergraduate students looking for term paper topics, to graduate students starting a literature review for their thesis work, and professionals seeking a concise summary of a particular topic. Information on the historical development of diverse topics within geomorphology provides context for ongoing research; discussion of research strategies, equipment, and field methods, laboratory experiments, and numerical simulations reflect the multiple approaches to understanding Earth’s surfaces; and summaries of outstanding research questions highlight future challenges and suggest productive new avenues for research. Our future ability to adapt to geomorphic changes in the critical zone very much hinges upon how well landform scientists comprehend the dynamics of Earth’s diverse surfaces. This Treatise on Geomorphology provides a useful synthesis of the state of the discipline, as well as highlighting productive research directions, that Educators and students/researchers will find useful. Geomorphology has advanced greatly in the last 10 years to become a very interdisciplinary field. Undergraduate students looking for term paper topics, to graduate students starting a literature review for their thesis work, and professionals seeking a concise summary of a particular topic will find the answers they need in this broad reference work which has been designed and written to accommodate their diverse backgrounds and levels of understanding Editor-in-Chief, Prof. J. F. Shroder of the University of Nebraska at Omaha, is past president of the QG&G section of the Geological Society of America and present Trustee of the GSA Foundation, while being well respected in the geomorphology research community and having won numerous awards in the field. A host of noted international geomorphologists have contributed state-of-the-art chapters to the work. Readers can be guaranteed that every chapter in this extensive work has been critically reviewed for consistency and accuracy by the World expert Volume Editors and by the Editor-in-Chief himself No other reference work exists in the area of Geomorphology that offers the breadth and depth of information contained in this 14-volume masterpiece. From the foundations and history of geomorphology through to geomorphological innovations and computer modelling, and the past and future states of landform science, no "stone" has been left unturned!

Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 362

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Book Description

Author: Herbert Edgar Wright
Publisher: U of Minnesota Press
ISBN: 145290796X
Category : Science
Languages : en
Pages : 298

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Book Description