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Showing 1 to 20 of 55 for “"geologic mapping"”.
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Geologic Mapping along the Benton Spring Fault, Nevada: Dextrally-offset Tuff-filled Paleovalleys in the Central Walker Lane
… eastern Central Walker Lane, I combine new mapping, geochronology, and structural studies to document the geometry and timing of dextral fault slip along the Benton Spring fault, an active intracontinental fault. The Benton Spring fault is one of four major dextral faults in the region; my …
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3D Geologic Mapping and Characterization Using Digital Outcrop Models Generated from Uninhabited Aerial Vehicles and Structure-from-Motion Photogrammetry
Outcrops are a primary source of geologic information and key in developing knowledge for teaching, training, and research. Observations from outcrop exposures provide opportunities to directly characterize detailed sedimentological composition, architectural characteristics, and link observations …
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Geologic Mapping in the Black Mountain Area, Northern Eastern California Shear Zone: Testing a Kinematic and Geometric Fault Slip Transfer Model
New geologic mapping, structural, kinematic, and <sup>40</sup>Ar/<sup>39</sup>Ar geochronology studies in the Black Mountain area, northern eastern California shear zone, are used to test a kinematic fault slip transfer model for the Owens Valley fault-Mina deflection transition. In the Black …
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Geologic mapping and zircon (U-Th)/He thermochronology of the Avawatz Mountains, California; Implications for the eastern terminus of the Garlock fault
… bend along the SDVF. Here we present detailed geologic mapping, structural analysis, and low-temperature thermochronology data to test these proposed structural and evolutionary models and to resolve the timing and kinematics of deformation. Field observations show numerous subvertical …
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Structural Controls of the MacFarlane Geothermal System, Humboldt County, Nevada: New Insights Based on Detailed Geologic Mapping, Shallow Temperature Surveys, and Magnetic Data
Detailed geologic mapping, structural analysis, magnetic and two-meter temperature data, integrated with previous datasets, constrain the structural controls of the MacFarlane geothermal system. MacFarlane hot springs and the travertine fissure ridges lie within a relay ramp. The relay ramp is …
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Evidence for Glacial Outburst Floods along the Lower Flathead River: Results from Geologic Mapping, Geomorphologic Analysis and a Gravity Survey near Polson, Montana
… along the Lower Flathead River: Results from Geologic Mapping, Geomorphologic Analysis, and a Gravity Survey near Polson,Montana Committee Chair: Marc S. Hendrix The Kerr Dam Canyon (KDC) and Buffalo Basin (BB) are located 10 km west of Polson, Montana along the Lower Flathead River. …
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Evidence for Glacial Outburst Floods along the Lower Flathead River: Results from Geologic Mapping, Geomorphologic Analysis and a Gravity Survey near Polson, Montana
… along the Lower Flathead River: Results from Geologic Mapping, Geomorphologic Analysis, and a Gravity Survey near Polson,Montana Committee Chair: Marc S. Hendrix The Kerr Dam Canyon (KDC) and Buffalo Basin (BB) are located 10 km west of Polson, Montana along the Lower Flathead River. …
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Geologic framework of gravity anomaly sources in the central Piedmont of Virginia
… are associated with rock units known from geologic mapping. ‘The subsurface distribution of these rock units interpreted from seismic reflection data was confirmed by measured variations in gravity. A two-dimensional model analysis indicates the following average in situ density values for …
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Stratigraphy and Structural Geometry at the Leading Edge of the Montana Thrust Belt, East of Sun River Canyon, Lewis and Clark and Teton Counties, Montana
Detailed geologic mapping east of Sun River Canyon in northwest Montana reveals the presence of a triangle zone: a folded, imbricate duplex-structure that forms a wedge at the leading edge of mountain thrust-belts. Triangle zone geometry is well documented in a series of structures that stretch …
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Stratigraphy and Structural Geometry at the Leading Edge of the Montana Thrust Belt, East of Sun River Canyon, Lewis and Clark and Teton Counties, Montana
Detailed geologic mapping east of Sun River Canyon in northwest Montana reveals the presence of a triangle zone: a folded, imbricate duplex-structure that forms a wedge at the leading edge of mountain thrust-belts. Triangle zone geometry is well documented in a series of structures that stretch …
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Petrology and contact relationships, SW portion PC Mullen Creek mafic complex, Medicine Bow Mts., Wy.
Geologic mapping and thin section petrography of rock units in and adjacent to the southwestern portion of the Mullen Creek mafic complex reveals the presence of a roof zone of a Precambrian layered basic intrusion that invaded a metavolcanic sequence (predominantly hornblende gneiss). This portion …
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Fault segmentation, fault linkage, and hazards along the Sevier fault, southwestern Utah
… formation along the active Sevier fault, Utah. Geologic mapping, geometric analyses, geochronology, landslide evaluation, and stream history led to five conclusions. (1) Six principal faults linked to form the Orderville salient and connect the Mt. Carmel and Spencer Bench segments. Four relay …
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Structural constraints on the exhumation of the Tso Morari Dome, NW Himalaya
… subducted continental crust. New, 1:50,000 scale geologic mapping and structural analysis in the Tso Morari area reveals evidence for five distinct deformational events. Rather than simple, one step processes envisioned by investigators in many ultrahigh-pressure terrains, exhumation of the Tso …
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Deformation, erosion and sedimentation in collisional orogens : case studies from eastern Tibet and southwestern China
… the eastern Himalayan syntaxis and integrates geologic mapping, slip-rate estimates, remote sensing, seismicity and geodesy. Fault slip rates are inferred by modeling the elastic deformation near major faults and the motions of a small number of crustal blocks.
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Ordivician limestones in the vicinity of Hoges Store, Giles County, Virginia
… zones of high-calcium limestones and by detailed geologic mapping. The report includes columnar sections showing the character and thickness of the limestone units. One large deposit of chemical-grade limestones was found about 1.5 miles northeast of Hoges Store, which is believed to underlie a …
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A geologic and potential field investigation of the central Virginia Piedmont
… of the Central Virginia Seismic Zone. Detailed geologic mapping and potential field modeling shows that the character of the Piedmont gravity high is a result of both crustal thickness variation and density contrasts between the surficially exposed lithologies. Geologic, gravity and magnetic …
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Laramide stress conditions and deformation mechanisms during the formation of Hudson and Dallas Domes, Lander Quadrangle, Wind River Mountains, Lander, Wyoming
… of the Wind River Mountains. The study involved geologic mapping of surface deformation, collecting and analyzing fault and fracture orientation data, and deducing the folds deformation geometry, folding mechanisms, and associated stresses. Mapping and well log constraints indicate that the …
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Structural and Petrologic Evolution of Acadian Dome Structures in Southern Vermont
… and thermobarometric studies, coupled with geologic mapping and structural analysis, provide critical evaluation of several different models for Acadian (Late Silurian to Middle Devonian) dome evolution in southern Vermont. Previous models considered diapiric uprise and composite nappe-stage …
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Reevaluating the Geologic Formations of the Upper Coastal Plain in Chesterfield County, South Carolina
<p>Data from a new geological map of the Patrick, S.C. 7.5 minute quadrangle (1:24,000) and detailed descriptions of two cores collected nearby (Middendorf and Cheraw, S.C.) permit improved interpretation of the geology of this portion of the Carolina Sandhills. Geologic mapping incorporated …
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Geology of the New Castle area, Craig County, Virginia
… The investigation included: 1) Preparation of a geologic map and crosssections; 2) The study and descriptions of the rock formations, with detailed measurements of several stratigraphic sections; 3) An analysis of the geologic structure, and; 4) An interpretation of the geologic history of the …
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