Paleoseismic Reconnaissance of the Sevier Fault, Kane and Garfield Counties, Utah
Title | Paleoseismic Reconnaissance of the Sevier Fault, Kane and Garfield Counties, Utah PDF eBook |
Author | William R. Lund |
Publisher | Utah Geological Survey |
Pages | 37 |
Release | 2008 |
Genre | Science |
ISBN | 1557917876 |
This 37 page report presents the results of a study of the Sevier fault in Utah.
History of Late Holocene Earthquakes at the Willow Creek Site and on the Nephi Segment, Wasatch Fault Zone, Utah
Title | History of Late Holocene Earthquakes at the Willow Creek Site and on the Nephi Segment, Wasatch Fault Zone, Utah PDF eBook |
Author | Anthony J. Crone |
Publisher | Utah Geological Survey |
Pages | 65 |
Release | 2014-09-15 |
Genre | CD-ROMs |
ISBN | 1557918945 |
This 43-page report presents new data from the Willow Creek site that provides well-defined and narrow bounds on the times of the three youngest earthquakes on the southern strand of the Nephi segment, Wasatch Fault zone, and refines the time of the youngest earthquake to about 200 years ago. This is the youngest surface rupture on the entire Wasatch fault zone, which occurred about a century or less before European settles arrived in Utah. Two trenches at the Willow Creek site exposed three scarp-derived colluvial wedges that are evidence of three paleoearthquakes. OxCal modeling of ages from Willow Creek indicate that paleoearthquake WC1 occurred at 0.2 ± 0.1 ka, WC2 occurred at 1.2 ± 0.1 ka, and WC3 occurred at 1.9 ± 0.6 ka. Stratigraphic constraints on the time of paleoearthquake WC4 are extremely poor, so OxCal modeling only yields a broadly constrained age of 4.7 ± 1.8 ka. Results from the Willow Creek site significantly refine the times of late Holocene earthquakes on the Southern strand of the Nephi segment, and this result, when combined with a reanalysis of the stratigraphic and chronologic information from previous investigations at North Creek and Red Canyon, yield a stronger basis of correlating individual earthquakes between all three sites.
Survey Notes
Title | Survey Notes PDF eBook |
Author | |
Publisher | |
Pages | 64 |
Release | 2008 |
Genre | Geology |
ISBN |
Paleoseismology of Utah
Title | Paleoseismology of Utah PDF eBook |
Author | |
Publisher | |
Pages | |
Release | 2006 |
Genre | Faults (Geology) |
ISBN |
Survey Notes
Title | Survey Notes PDF eBook |
Author | |
Publisher | |
Pages | 302 |
Release | 2003 |
Genre | Geology |
ISBN |
Special Studies
Title | Special Studies PDF eBook |
Author | Utah Geological and Mineral Survey |
Publisher | |
Pages | 40 |
Release | 1996 |
Genre | Geology |
ISBN |
Alluvial Fan Flooding
Title | Alluvial Fan Flooding PDF eBook |
Author | National Research Council |
Publisher | National Academies Press |
Pages | 182 |
Release | 1996-10-07 |
Genre | Science |
ISBN | 0309185491 |
Alluvial fans are gently sloping, fan-shaped landforms common at the base of mountain ranges in arid and semiarid regions such as the American West. Floods on alluvial fans, although characterized by relatively shallow depths, strike with little if any warning, can travel at extremely high velocities, and can carry a tremendous amount of sediment and debris. Such flooding presents unique problems to federal and state planners in terms of quantifying flood hazards, predicting the magnitude at which those hazards can be expected at a particular location, and devising reliable mitigation strategies. Alluvial Fan Flooding attempts to improve our capability to determine whether areas are subject to alluvial fan flooding and provides a practical perspective on how to make such a determination. The book presents criteria for determining whether an area is subject to flooding and provides examples of applying the definition and criteria to real situations in Arizona, California, New Mexico, Utah, and elsewhere. The volume also contains recommendations for the Federal Emergency Management Agency, which is primarily responsible for floodplain mapping, and for state and local decisionmakers involved in flood hazard reduction.