GET IT HERE
By: Robert F. Biek, John J. Anderson, Edward G. Sable, and Peter D. Rowley
The Haycock Mountain quadrangle lies in the central part of the Markagunt Plateau in southwest Utah and includes the eastern part of Panguitch Lake, a popular area of summer and winter recreational use. Despite the plateau’s relatively simple structure of a gently east-tilted fault block, the quadrangle contains scenic and instructive exposures of south-west Utah’s youngest basaltic lava flows, classic examples of inverted valleys capped by older lava flows, and the southern margin of the Markagunt Megabreccia, including newly identified, exceptionally instructive exposures of its basil slip surface. The Megabreccia is the debris of Utah’s largest catastrophic landslide deposit, which covers 1300 square miles (3400 km²) of the northern and central Markagunt Plateau.
By: Robert F. Biek, John J. Anderson, Edward G. Sable, and Peter D. Rowley
The Panguitch Lake quadrangle lies in the central part of the Markagunt Plateau in southwest Utah and includes Panguitch Lake, a popular area of summer and winter recreational use. Despite the plateau’s relatively simple structure of a gently east-tilted fault block, the quadrangle contains scenic and instructive exposures of southwest Utah’s youngest basaltic lava flows, classic examples of inverted valleys capped by older lava flows, glacial deposits in the Castle Valley area, and the southern margin of the Markagunt Megabreccia. The Megabreccia is the debris of Utah’s largest catastrophic landslide deposit, which covers 1300 square miles (3400 km²) of the northern and central Markagunt Plateau.
Edited By: John S. MacLean, Robert F. Biek, and Jacqueline E. Huntoon
This CD contains 35 geological papers and 2 road guides describing the geology of Utah’s Far South. The papers are arranged by topics: Geomorphology, Hydrogeology, Reservoir Properties, Statigraphy, Paleontology, Structural Geology & Volcanism, and Field Trip Road Guides. The publication also includes a memoriam to Dr. Lehi F. Hintze.
Current Issue Contents:
• The Uinta Mountains: A Tale of Two Geographies
• In Memoriam: Lehi F. Hintze
• Students Fill the GIS Gap
• The 2014 Crawford Award
• GeoSights: Roosevelt Hot Springs Geothermal Area, Beaver County
• New Publications
• Teacher’s Corner
• Core Center News
• Glad You Asked: What are keeper potholes & how are they formed?
By: William R. Lund
The Utah Geological Survey has revised and updated the Utah fault database used with the Federal Emergency Management Agency’s Hazus Earthquake Model. The Hazus Earthquake Model loss estimation software is designed to produce loss estimates for use by federal, state, regional, and local governments in planning for earthquake risk mitigation, emergency preparedness, response, and recovery. The model’s loss estimates are based on a scenario earthquake on a fault in an area of interest. This revised Hazus Utah fault database provides parameters for scenario earthquakes on significant Utah Quaternary-active faults statewide and for select faults/fault sections in adjoining states. The previous Utah Hazus fault database contained 27 Quaternary faults/fault sections taken largely from fault sources on the United States National Seismic Hazard Maps. This revised database expands the Utah Hazus fault database to include all known Late Quaternary and younger faults/fault segments capable of generating a ≥M 6.75 earthquake in Utah, and includes 82 Quaternary-active faults/fault segments, and nine credible multisegment rupture scenarios.
By: V.E. Langenheim, R.Q. Oaks, H. Willis, A.I. Hiscock, B.A. Chuchel, J. Rosario, and C.L. Hardwick
A new isostatic residual gravity map of the Tremonton 30′ x 60′ quadrangle of Utah is based on compilation of preexisting data and new data collected by the Utah and U.S. Geological Surveys. Pronounced gravity lows occur over North Bay, northwest of Brigham City, and Malad and Blue Creek Valleys, indicating significant thickness of low-density Tertiary sedimentary rocks and deposits. Gravity highs coincide with exposures of dense pre-Cenozoic rocks in the Promontory, Clarkston, and Wellsville Mountains. The highest gravity values are located in southern Curlew Valley and may be produced in part by deeper crustal density variations or crustal thinning. Steep gradients also coincide with the margins of the Promontory Mountains, Little Mountain, West Hills, and the eastern margin of the North Promontory Mountains and may define concealed basin-bounding faults.
By: Christopher B. DuRoss and Michael D. Hylland
The Salt Lake City segment (SLCS) of the Wasatch fault zone and the West Valley fault zone (WVFZ) are Holocene-active faults that have evidence of large-magnitude (M ~6-7) surface-faulting earthquakes. Paleoseismic research trenches at the Penrose Drive site on the SLCS and Baileys Lake site on the WVFZ provided data that shed light on the faulting behavior and interaction of these graben-forming fault systems. Numerical age control (22 radiocarbon samples 23 optically stimulated luminescence samples) and OxCal modeling of six or seven surface-faulting earthquakes on the SLCS and four earthquakes on the WVFZ helped refine the earthquake chronologies for these faults and allowed a comparison of the chronologies to evaluate fault interaction. The chronologies, as well as vertical displacements, support a model of coseismic fault movement.
By: Hellmut H. Doelling and Paul A. Kuehne
The Klondike Bluffs 7.5′ quadrangle covers a large part of Arches National Park and encompasses colorful bedrock strata ranging in age from Pennsylvania Paradox Formation to Cretaceous Mancos Shale. Salt diapirs are common throughout the area, and the Salt-Cache Valley Salt Structure is the most prominent structure, with several additional salt structures present, including the Salt Wash and Courthouse synclines and the Elephant Butte folds. Scenic resources in the area showcase joints, fins, grabens above salt wells, and the highest concentration of arches in the world.
This CD contains geographic information system (GIS) files in ESRI file geodatabase and shapefile formats. A geologic map at 1:24,000 scale and a 31-page booklet are also included in PDF format. The latest version of Adobe Reader is required to view the PDF files.
By: Hellmut H. Doelling and Paul A. Kuehne
The Mollie Hogans 7.5′ quadrangle covers a large part of Arches National Park and encompasses colorful bedrock strata ranging in age from Pennsylvanian Paradox Formation to Cretaceous Mancos Shale. Salt diapirs are common throughout the area, and the Salt-Cache Valley Salt Structure is the most prominent structure, with several additional salt structures present, including the Salt Wash and Courthouse synclines and the Elephant Butte folds. Scenic resources in the area showcase joints, fins, grabens above salt walls, and the highest concentration of arches in the world.
This CD contains geographic information system (GIS) files in ESRI file geodatabase and shapefile formats. A geologic map at 1:24,000 scale and a 31-page booklet are also included in PDF format. The latest version of Adobe Reader is required to view the PDF files.
By: Hellmut H. Doelling and Paul A. Kuehne
The Windows Section 7.5′ quadrangle covers a large part of Arches National Park and encompasses colorful bedrock strata ranging in age from Pennsylvanian Paradox Formation to Cretaceous Mancos Shale. Salt diapirs are common throughout the area, and the Salt-Cache Valley Salt Structure is the most prominent structure, with several additional salt structures present, including the Salt Wash and Courthouse synclines and the Elephant Butte folds. A one-mile-wide zone of faults is located in the Windows Section northeast of the Moab fault. Scenic resources in the area showcase joints, fins, grabens above salt walls, and the highest concentration of arches in the world.
This CD contains geographic information system (GIS) files in ESRI file geodatabase and shapefile formats. A geologic map at 1:24,000 scale and a 31-page booklet are also included in PDF format. The latest version of Adobe Reader is required to view the PDF files.
Here are several more articles about the UGS rockfall investigation, including our own news release with links to the published report.
A Division of the Utah Department of Natural Resources.
Utah Geological Survey
1594 West North Temple, Suite 3110Salt Lake City, Utah 84116
Mailing Address:
PO BOX 146100
Salt Lake City, Utah 84114
801-537-3300
Staff Directory
Visit Us!
1594 W. North TempleSalt Lake City, Utah 84116
Hours: Monday–Friday 9 a.m. to 5 p.m.
Visit Online Store