Download or read book Detailed Geologic Studies of Paleoseismic Features Exposed at Sites in the East Tennessee Seismic Zone written by Kathleen Frances Warrell and published by . This book was released on 2013 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: The East Tennessee seismic zone (ETSZ) is the second most active in the eastern United States, but recorded earthquakes do not exceed Mw̳ [moment magnitude] = 4.6. Earthquake epicenters are located 5-26 kilometers deep in autochthonous basement, and faults producing these earthquakes do not break the surface. Detailed paleoseismic investigations at sites within the ETSZ include: detailed geological mapping, trenching, aerial photograph reconnaissance, X-ray diffraction (XRD), grain-size analysis, and optically stimulated luminescence dating of alluvium. Site DL-6 near Dandridge, Tennessee, reveals a complex array of features providing evidence that at least 4‒6 Mw̳ > 6 earthquakes affected the area. A thrust fault with ~1 meter displacement is traceable for ~50 meters in the mapped area from Quaternary terrace sediments into Ordovician Sevier Shale saprolite where it develops multiple splays. This fault truncates a 30 centimeter-wide Quaternary sediment-filled fissure; the fissure is also offset ~10 centimeters by a small strike-slip fault that truncates against a splay of the main thrust fault. The fissure may be traceable for over 2 kilometers across Douglas Reservoir. Fault surface and slickenline orientations indicate west-vergent slip on many thrust splay surfaces. Fracture orientations measured at site DL-6 are close to those in Sevier Shale here; reactivation of near-vertical fractures is mostly strike-slip. Additionally, shale chips in Quaternary sediment at a nearby site at Dandridge, Tennessee, contain the same mineralogy as underlying Sevier Shale, indicating that these chips may have been liquefied and brought up through Quaternary terrace sediments during an earthquake. Sites along the Chattooga River near Lyerly, Georgia, provide evidence for at least one Mw̳ > 6 earthquake. Sand dikes emanating from a source bed in a cut bank contain liquefiable sediments that intruded overlying cap sediments; grain-size and XRD analyses suggest cap sediments are more clay-rich than source or dike sediments. Aerial photographs of the area contain elliptical discontinuities that may represent sand blow deposits. Field reconnaissance of the area identified possible feeder dikes to sand blows; further investigation is required. Collectively, these data provide substantial evidence for the occurrence of Mw̳ > 6 earthquakes in the ETSZ, and motivate further paleoseismic studies here.
Download or read book Geology at Every Scale written by Annette Summers Engel and published by Geological Society of America. This book was released on 2018-03-30 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The chapters in this guidebook are organized according to major geologic themes, starting first with field trips in the Knoxville area that highlight, in some way, local carbonates, and then by ending with field trips focused on regional tectonics that include travel to North and South Carolina and Georgia"--
Download or read book Recent Advances in North American Paleoseismology and Neotectonics East of the Rockies written by Randel Tom Cox and published by Geological Society of America. This book was released on 2012 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This volume focuses on the continental intraplate region of the United States and provides an update and overview of documented Quaternary faulting and paleoseismic liquefaction east of the Rocky Mountains, and of the application of these results to seismic hazard and risk assessments. Contributions include papers that describe zones of newly recognized Quaternary deformation such as the East Tennessee Seismic Zone, as well as reinterpretations of well-known areas such as the New Madrid Seismic Zone. The chapters make important contributions to the recognition of earthquake sources active during the Quaternary and assess the seismic hazards posed by these sources. This volume should interest a wide range of readers from geology, seismology, hazard assessment, and emergency management"--Provided by publisher.
Download or read book Report of Investigations Tennessee Division of Geology written by Tennessee. Division of Geology and published by . This book was released on 1955 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Elements of the Geology of Tennessee written by James Merrill Safford and published by . This book was released on 1900 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geology of Tennessee written by James Merrill Safford and published by . This book was released on 1869 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Consensus Preferred Recurrence interval and Vertical Slip rate Estimates written by William R. Lund and published by Utah Geological Survey. This book was released on 2005-06-30 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of the Utah Quaternary Fault Parameters Working Group (hereafter referred to as the Working Group) review and evaluation of Utah’s Quaternary fault paleoseismic-trenching data. The purpose of the review was to (1) critically evaluate the accuracy and completeness of the paleoseismictrenching data, particularly regarding earthquake timing and displacement, (2) where the data permit, assign consensus, preferred recurrence-interval (RI) and vertical slip-rate (VSR) estimates with appropriate confidence limits to the faults/fault sections under review, and (3) identify critical gaps in the paleoseismic data and recommend where and what kinds of additional paleoseismic studies should be performed to ensure that Utah’s earthquake hazard is adequately documented and understood. It is important to note that, with the exception of the Great Salt Lake fault zone, the Working Group’s review was limited to faults/fault sections having paleoseismic-trenching data. Most Quaternary faults/fault sections in Utah have not been trenched, but many have RI and VSR estimates based on tectonic geomorphology or other non-trench-derived studies. Black and others compiled the RI and VSR data for Utah’s Quaternary faults, both those with and without trenches.
Download or read book Collaborative Research University of Maryland and Branch of Geologic Risk Assessment USGS written by Martitia Tuttle and published by . This book was released on 1994* with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Administrative Report of the State Geologist 1920 written by Charles Butts and published by . This book was released on 1919 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin State Geological Survey written by and published by . This book was released on 1911 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elementary Geology of Tennessee written by William Gibbs McAdoo and published by . This book was released on 1881 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatial and Temporal Characteristics of Paleoseismic Features in the Southern Terminus of the New Madrid Seismic Zone in Eastern Arkansas written by Haydar Jaber Al-Shukri and published by . This book was released on 2002* with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Geological Reconnoissance of the State of Tennessee written by Tennessee. Division of Geology and published by . This book was released on 1856 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Interpretation of Seismic Cross Sections in the Valley and Ridge of Eastern Tennessee written by Robert C. Milici and published by . This book was released on 1979 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geology of Tennessee written by James Merrill Safford and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatial and Temporal Characteristics of Paleoseismic Features in the Southern Terminus of the New Madrid Seismic Zone in Eastern Arkansas written by Haydar Jaber Al-Shukri and published by . This book was released on 2002 with total page 54 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 2006 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
