Paleoliquefaction And Possible Surface Deformation Along The New Madrid Seismic Zone In Yarbro Arkansas PDF Download
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Author | : James Christian Dunahue |
Publisher | : |
Total Pages | : 47 |
Release | : 2019 |
Genre | : Electronic dissertations |
ISBN | : |
Download Paleoliquefaction and Possible Surface Deformation Along the New Madrid Seismic Zone in Yarbro, Arkansas Book in PDF, ePub and Kindle
From interpretation of historical aerial photography and LiDAR imagery of northeast Arkansas, we identified a northeast-striking topographic lineament coincident with the trend of modern seismicity along the Axial Fault (AF) in the New Madrid Seismic Zone (NMSZ) (Fig. 1). The linear ridge extends 7.0 km across the landscape, is approximately 1 – 2 m higher than the topography to the east and west, and has en echelon trend segments. The anomalous topography appears to crosscut scroll bars, meander loops, and other geomorphic features along this portion of the Mississippi floodplain. This study sought to determine whether the lineament was of depositional or tectonic origin. We collected geophysical data including electrical resistivity (ERT), ground penetrating radar (GPR), magnetics, and seismic refraction across the ridge at three locations in order to image the subsurface of the structure of the ridge. ERT data show an abrupt discontinuity between higher and lower resistivity at depth beneath the western margin of the ridge suggesting a possible fault. Paleoseismic trenches excavated across the western side of the ridge revealed both a large, linear graben and a large linear sand blow with multiple sand units. The graben is 6.5 m wide and 1.0 m deep, and is filled with an organic-rich clay plug with many fractures along which root casts have formed and sand dikes have intruded. The liquefaction features include a main 1.8-m-wide, feeder dike that crosscuts a paleosol, several subsidiary dikes, and an overlying and related compound sand blow. These data suggest that the linear ridge graben pair and the parallel sand blow features may either be evidence for an active fault or be related to earthquake – induced lateral spreading and liquefaction. It is possible that the two features may both reveal and mask the presence of an active fault.
Author | : Anthony J. Crone |
Publisher | : |
Total Pages | : 21 |
Release | : 1982 |
Genre | : Geology |
ISBN | : |
Download Configuration and Deformation of the Paleozoic Bedrock Surface in the New Madrid Seismic Zone Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 72 |
Release | : 1992 |
Genre | : Earthquake hazard analysis |
ISBN | : |
Download Goals, Opportunities, and Priorities for the USGS Earthquake Hazards Reduction Program Book in PDF, ePub and Kindle
Author | : T. V. McEvilly |
Publisher | : |
Total Pages | : 24 |
Release | : 1995 |
Genre | : Faults (Geology) |
ISBN | : |
Download Bay Area Digital Seismic Network Book in PDF, ePub and Kindle
Author | : A.R. Gillespie |
Publisher | : Elsevier |
Total Pages | : 595 |
Release | : 2003-12-17 |
Genre | : Science |
ISBN | : 0080474098 |
Download The Quaternary Period in the United States Book in PDF, ePub and Kindle
This book reviews advances in understanding of the past ca. two million years of Earth history - the Quaternary Period - in the United States. It begins with sections on ice and water - as glaciers, permafrost, oceans, rivers, lakes, and aquifers. Six chapters are devoted to the high-latitude Pleistocene ice sheets, to mountain glaciations of the western United States, and to permafrost studies. Other chapters discuss ice-age lakes, caves, sea-level fluctuations, and riverine landscapes. With a chapter on landscape evolution models, the book turns to essays on geologic processes. Two chapters discuss soils and their responses to climate, and wind-blown sediments. Two more describe volcanoes and earthquakes, and the use of Quaternary geology to understand the hazards they pose. The next part of the book is on plants and animals. Five chapters consider the Quaternary history of vegetation in the United States. Other chapters treat forcing functions and vegetation response at different spatial and temporal scales, the role of fire as a catalyst of vegetation change during rapid climate shifts, and the use of tree rings in inferring age and past hydroclimatic conditions. Three chapters address vertebrate paleontology and the extinctions of large mammals at the end of the last glaciation, beetle assemblages and the inferences they permit about past conditions, and the peopling of North America. A final chapter addresses the numerical modeling of Quaternary climates, and the role paleoclimatic studies and climatic modeling has in predicting future response of the Earth's climate system to the changes we have wrought.
Author | : Albert M. Rogers |
Publisher | : |
Total Pages | : 252 |
Release | : 1996 |
Genre | : Earthquake hazard analysis |
ISBN | : |
Download Assessing Earthquake Hazards and Reducing Risk in the Pacific Northwest Book in PDF, ePub and Kindle
An investigation of the earthquake potential in the Pacific Northwest and examination of the measures necessary to reduce seismic hazards.
Author | : ROBERT S AUTOR YEATS |
Publisher | : Oxford University Press, USA |
Total Pages | : 568 |
Release | : 1997 |
Genre | : Nature |
ISBN | : 9780195078275 |
Download The Geology of Earthquakes Book in PDF, ePub and Kindle
These serve as a common interdisciplinary background for the second half of the text, which divides the discussion of earthquakes according to tectonic environment: strike-slip, divergent, and convergent.
Author | : Jay Stratton Noller |
Publisher | : American Geophysical Union |
Total Pages | : 606 |
Release | : 2000-01-10 |
Genre | : Science |
ISBN | : |
Download Quaternary Geochronology Book in PDF, ePub and Kindle
Forty-four contributions survey the established and experimental means of dating Quaternary Period surficial materials. The basic theory, procedures, and accuracy are reviewed for sidereal, isotopic, radiogenic, chemical and biological, geomorphological, and correlation methods. A series of case studies then illustrates the application of geochronology in Quaternary geology and the emerging field of paleoseismology. The volume is a minor revision and update of a portion of a 1998 report to the U.S. Nuclear Regulatory Commission. Member price, $56. Annotation copyrighted by Book News, Inc., Portland, OR.
Author | : Tsunemasa Shiki |
Publisher | : Elsevier |
Total Pages | : 426 |
Release | : 2011-10-13 |
Genre | : Science |
ISBN | : 0080558917 |
Download Tsunamiites - Features and Implications Book in PDF, ePub and Kindle
This book is an overview of the state-of-the art developments in sedimentology of tsunami-induced and tsunami-affected deposits, namely tsunamiites. It also highlights new problems and issues calling for additional investigation, and provides insight into the direction for future tsunamiite researches. Provides a comprehensive overview of developments in tsunamiites Investigates future trends and development needs Cutting edge research articles from leading experts aimed at researchers and scientists
Author | : Brian F. Atwater |
Publisher | : |
Total Pages | : 108 |
Release | : 1997 |
Genre | : Paleoseismology |
ISBN | : |
Download Recurrence Intervals for Great Earthquakes of the Past 3,500 Years at Northeastern Willapa Bay, Washington Book in PDF, ePub and Kindle