Download or read book Evidence of Quaternary Faulting Along a Prominent Topographic Lineament Northern Mississippi Embayment written by Sean Pinardi and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A prominent topographic lineament lays adjacent and parallel to the southeastern margin of the Reelfoot Rift. Recent paleoseismological studies suggest the southern segment of the lineament corresponds to a pair of steeply dipping strike-slip faults. However, the northern segment of the lineament is seismically quiescent and was mapped as a fluvial terrace riser by several geologists in the past. To ascertain whether the northern segment of the lineament could have been produced by faulting, the concavity of the lineament's slope was quantified and compared to that of several known fault scarp and terrace riser slopes. A hypsometric analysis was performed in order to assess whether any surface deformation related to faulting might have occured along the lineament, and electrical resistivity tomography was used to image subsurface features. When combined, results from these analyses strongly suggest mid-Quaternary faulting is responsible for creating the northern segment of the rift margin lineament.
Download or read book Geomorphology and Quaternary Geologic History of the Lower Mississippi Valley written by Roger T. Saucier and published by . This book was released on 1994 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismic Hazards of the Upper Mississippi Embayment written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthquakes are a major hazard in the middle Mississippi River valley of the upper Mississippi embayment. Microseismicity along the New Madrid seismic zone is illuminating faults that are believed responsible for the great New Madrid earthquakes of 1811-1812. These faults are right lateral strike slip faults within the Blytheville arch and western margin of the Reelfoot rift that are linked by the southwest dipping Reelfoot reverse fault. The Bootheel lineament and back thrusts of the Reelfoot fault may also have slipped in 1811-12. Geomorphic effects of the 1811-12 sequence include displacement of the Mississippi River; uplift of the Lake County uplift, Tiptonville dome, Blytheville arch; subsidence of Reelfoot Lake, Big Lake, and Lake St Francis; landslides on the eastern bluffs of the Mississippi River valley; and extensive liquefaction. In addition there is evidence for 1811-12 landsliding on the eastern margin of Crowley's Ridge, formation of a lake on the Obion River, and formation of seismic craters on the loess covered eastern Mississippi Valley bluffs. Peripheral to the New Madrid seismic zone; the Big Creek, Commerce, and Crittenden County faults have Holocene displacement and faults along the margins of Crowley's Ridge have Pleistocene displacement. The margins of Sikeston Ridge are underlain by faults that apparently lifted the ridge in Quaternary time. Similarly, the eastern Mississippi Valley bluffs are underlain by faults that appear to have affected the current position of the Mississippi River. Thus, there is evidence for widespread Quaternary faulting within the upper Mississippi embayment Paleoliquefaction and trench excavations across the Reelfoot fault reveal a minimum of 3 prehistoric earthquakes and an estimated recurrence interval of 450 years.
Download or read book General Geology of the Mississippi Embayment written by Elliott Morse Cushing and published by . This book was released on 1964 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Location And Characteristic Features of the Quaternary Deformation in the Mississippi Embayment from High resolution Seismic Reflection Data written by Lei Guo and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The New Madrid Seismic Zone (NMSZ), central US. is a controversial midcontinental region where the occurrence of large magnitude historical and prehistorical earthquakes and the high level of instrumental seismicity, clash with the lack of evident surface and subsurface deformation and with slow geodetic rates. To unravel this apparent paradox locally and to contribute to the understanding of intraplate seismicity globally, I integrate new high-resolution seismic reflection data acquired as part of the Mississippi River Project, data acquired for the Meeman-Shelby Fault study, and existing seismic reflection data, to investigate the long-term deformation in the northern Mississippi Embayment. In particular this study focuses on the identification and characterization of the structures where Quaternary deformation is accommodated in the northern Mississippi Embayment, on the comparison of the newly discovered structures with those that are seismically active today, and on the analysis of the distribution of the Quaternary deformation with respect to the NMSZ. The results show that Quaternary deformation has been accommodated along adjacent faults additional to the NMSZ fault system, and that the NMSZ faults are virtually undistinguishable from quiescent faults, except for the instrumental seismicity. The distribution of Quaternary deformation extends beyond the footprint of the high-velocity lower crustal layer (i.e. & ldquo;mafic rift pillow & rdquo;), invoked by several geodynamic models as the possible feature capable of concentrating stress in this region and responsible for the seismicity in the central US. The long-term Quaternary deformation appears to be accommodated along pre-existing features predominantly associated with the Reelfoot Rift structure.
Download or read book Neotectonics of the Northern Mississippi Embayment written by W. John Nelson and published by . This book was released on 1999 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Integrated Geophysical Assessment of Late Quaternary Neotectonics Along the Norther i e Northern Mississippi Embayment Extension of the Fluospar Area Fault Complex written by Edward Woolery and published by . This book was released on 2003* with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neotectonics of the Northern Mississippi Embayment written by W. John Nelson and published by . This book was released on 1999 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin Mississippi Geological Economic and Topographical Survey written by Mississippi Geological, Economic, and Topographical Survey and published by . This book was released on 1968 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quaternary Geology of the Lower Mississippi Valley written by Roger T. Saucier and published by . This book was released on 1974 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geomorphology and Quarternary sic Geologic History of the Lower Mississippi Valley written by Roger T. Saucier and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Abstract: this comprehensive, two-volume synthesis, the first in 50 years, is aimed at a multidisciplinary audience concerned with multiple aspects of water resources engineering and natural and cultural resources management. It presents at a scale of 1:250,000 the distribution of environments of deposition as compiled from more than 30 years of detailed geologic mapping, as well as a new interpretation and delineation of the eroded suballuvial surface. A detailed interpretation of the evolution of the alluvial valley and deltaic plain is presented and illustrated by a series of 13 paleogeographic reconstructions. The chronology of valley events is based on stratigraphic relationships and radiometric age determinations but relies heavily on archeological evidence. The geologic processes and controls that affect the entire region include continental glaciations, climate, sea level variations, tectonics and diapirism, and subsidence. Both erosional and depositional landscapes are represented, and the lithology, soils, and geotechnical properties of the latter are presented in narrative and tabular form for the principal fluvial, lacustrine, eclian, deltaic, and deltaic-marine environments. Discussions of neotectonics in the region focus on the New Madrid Seismic Zone, and a section of the synthesis addresses special engineering considerations such as groundwater occurrence, mass movements, river meandering, and long-term stability."--Publisher's website.
Download or read book Dickey Lincoln School Lakes Transmission Project ME NH VT written by and published by . This book was released on 1978 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismological Research Letters written by and published by . This book was released on 1987* with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spring Meeting written by American Geophysical Union. Meeting and published by . This book was released on 2000 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The New Madrid Earthquake written by Myron L. Fuller and published by . This book was released on 1992 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geology of the Rewey and Mifflin Quadrangles Wisconsin written by Alfred R. Taylor and published by . This book was released on 1964 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prepared in cooperation with the Wisconsin Geological and Natural History Survey.
Download or read book The Quaternary and Pliocene Yellowstone Plateau Volcanic Field of Wyoming Idaho and Montana written by Robert L. Christiansen and published by . This book was released on 2001 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
