Victoria Langenheim
Vickie is a Research Geophysicist with the Geology, Minerals, Energy, and Geophysics Science Center
Science and Products
Filter Total Items: 34
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Recent deformation along the offshore Malibu Coast, Dume, and related faults west of Point Dume, southern California Recent deformation along the offshore Malibu Coast, Dume, and related faults west of Point Dume, southern California
Offshore faults west of Point Dume, southern California, are part of an important regional fault system that extends for about 206 km, from near the city of Los Angeles westward along the south flank of the Santa Monica Mountains and through the northern Channel Islands. This boundary fault system separates the western Transverse Ranges, on the north, from the California Continental...
Authors
M. A. Fisher, V.E. Langenheim, C.C. Sorlien, P. Dartnell, R. W. Sliter, G.R. Cochrane, F. L. Wong
Geophysical evidence for wedging in the San Gorgonio Pass structural knot, southern San Andreas fault zone, southern California Geophysical evidence for wedging in the San Gorgonio Pass structural knot, southern San Andreas fault zone, southern California
Geophysical data and surface geology define intertonguing thrust wedges that form the upper crust in the San Gorgonio Pass region. This picture serves as the basis for inferring past fault movements within the San Andreas system, which are fundamental to understanding the tectonic evolution of the San Gorgonio Pass region. Interpretation of gravity data indicates that sedimentary rocks...
Authors
V.E. Langenheim, R.C. Jachens, J. C. Matti, E. Hauksson, D. M. Morton, A. Christensen
Isostatic residual gravity map of The Santa Clara Valley and vicinity, California Isostatic residual gravity map of The Santa Clara Valley and vicinity, California
No abstract available.
Authors
Carter W. Roberts, Robert C. Jachens, David A. Ponce, Victoria E. Langenheim
Marine geology and earthquake hazards of the San Pedro Shelf region, southern California Marine geology and earthquake hazards of the San Pedro Shelf region, southern California
High-resolution seismic-reflection data have been com- bined with a variety of other geophysical and geological data to interpret the offshore structure and earthquake hazards of the San Pedro Shelf, near Los Angeles, California. Prominent structures investigated include the Wilmington Graben, the Palos Verdes Fault Zone, various faults below the western part of the shelf and slope, and...
Authors
Michael A. Fisher, William R. Normark, Victoria E. Langenheim, Andrew J. Calvert, Ray Sliter
Geophysical and isotopic mapping of preexisting crustal structures that influenced the location and development of the San Jacinto fault zone, southern California Geophysical and isotopic mapping of preexisting crustal structures that influenced the location and development of the San Jacinto fault zone, southern California
We examine the role of preexisting crustal structure within the Peninsular Ranges batholith on determining the location of the San Jacinto fault zone by analysis of geophysical anomalies and initial strontium ratio data. A 1000-km-long boundary within the Peninsular Ranges batholith, separating relatively mafic, dense, and magnetic rocks of the western Peninsular Ranges batholith from...
Authors
V.E. Langenheim, R.C. Jachens, D. M. Morton, R. W. Kistler, J. C. Matti
Upper crustal structure from the Santa Monica Mountains to the Sierra Nevada, Southern California: Tomographic results from the Los Angeles Regional Seismic Experiment, Phase II (LARSE II) Upper crustal structure from the Santa Monica Mountains to the Sierra Nevada, Southern California: Tomographic results from the Los Angeles Regional Seismic Experiment, Phase II (LARSE II)
In 1999, the U.S. Geological Survey and the Southern California Earthquake Center (SCEC) collected refraction and low-fold reflection data along a 150-km-long corridor extending from the Santa Monica Mountains northward to the Sierra Nevada. This profile was part of the second phase of the Los Angeles Region Seismic Experiment (LARSE II). Chief imaging targets included sedimentary basins...
Authors
W. J. Lutter, G. S. Fuis, T. Ryberg, D. A. Okaya, R.W. Clayton, P.M. Davis, C. Prodehl, J.M. Murphy, V.E. Langenheim, M.L. Benthien, N. J. Godfrey, N.I. Christensen, K. Thygesen, C.H. Thurber, G. Simila, Gordon R. Keller
The offshore Palos Verdes fault zone near San Pedro, Southern California The offshore Palos Verdes fault zone near San Pedro, Southern California
High-resolution seismic-reflection data are combined with a variety of other geophysical and geological data to interpret the offshore structure and earthquake hazards of the San Pedro shelf, near Los Angeles, California. Prominent structures investigated include the Wilmington graben, the Palos Verdes fault zone, various faults below the west part of the San Pedro shelf and slope, and...
Authors
M. A. Fisher, W. R. Normark, V.E. Langenheim, A.J. Calvert, R. Sliter
Isostatic gravity map with simplified geology of the Los Angeles 30 x 60 minute quadrangle Isostatic gravity map with simplified geology of the Los Angeles 30 x 60 minute quadrangle
This isostatic residual gravity map is part of the Southern California Areal Mapping Project (SCAMP) and is intended to promote further understanding of the geology in the Los Angeles 30 x 60 minute quadrangle, California, by serving as a basis for geophysical interpretations and by supporting both geological mapping and topical (especially earthquake) studies. Local spatial variations...
Authors
R .J. Wooley, R. F. Yerkes, V.E. Langenheim, F. C. Chuang
Crustal structure of the Peninsular Ranges batholith from magnetic data: Implications for Gulf of California rifting Crustal structure of the Peninsular Ranges batholith from magnetic data: Implications for Gulf of California rifting
A 70-km-wide belt of magnetic highs extends ???1200 km northwest from the southern tip of the Baja California peninsula into southern California. The anomalies are caused by the mafic western belt of the Peninsular Ranges batholith, which is exposed extensively along the northern 800 km length of the magnetic belt. Modeling indicates that the source of the anomalies extends to mid-to...
Authors
V.E. Langenheim, R.C. Jachens
Isostatic gravity map of the Monterey 30' x 60' quadrangle and adjacent areas, California Isostatic gravity map of the Monterey 30' x 60' quadrangle and adjacent areas, California
The digital dataset consists of one file (monterey_100k.iso) containing 2,385 gravity stations. The file, monterey_100k.iso, contains the principal facts of the gravity stations, with one point coded per line. The format of the data is described below. Each gravity station has a station name, location (latitude and longitude, NAD27 projection), elevation, and an observed gravity reading...
Authors
V.E. Langenheim, S. R. Stiles, R.C. Jachens
Preliminary report on geophysical data in Yavapai County, Arizona Preliminary report on geophysical data in Yavapai County, Arizona
Recently acquired geophysical data provide information on the geologic framework and its effect of groundwater flow and on stream/aquifer interaction in Yavapai County, Arizona. High-resolution aeromagnetic data reflect diverse rock types at and below the topographic surface and have permitted a preliminary interpretation of faults and underlying rock types (in particular, volcanic) that...
Authors
V.E. Langenheim, J.P. Hoffmann, K.W. Blasch, Ed DeWitt, Laurie Wirt
Aeromagnetic Expression of Buried Basaltic Volcanoes Near Yucca Mountain, Nevada Aeromagnetic Expression of Buried Basaltic Volcanoes Near Yucca Mountain, Nevada
A high-resolution aeromagnetic survey has defined a number of small dipolar anomalies indicating the presence of magnetic bodies buried beneath the surface of Crater Flat and the Amargosa Desert. Results of potential-field modeling indicate that isolated, small-volume, highly magnetic bodies embedded within the alluvial deposits of both areas produce the anomalies. Their physical...
Authors
Dennis W. O’Leary, E. A. Mankinen, R.J. Blakely, V.E. Langenheim, D. A. Ponce
Science and Products
Filter Total Items: 34
No Result Found
Filter Total Items: 189
Recent deformation along the offshore Malibu Coast, Dume, and related faults west of Point Dume, southern California Recent deformation along the offshore Malibu Coast, Dume, and related faults west of Point Dume, southern California
Offshore faults west of Point Dume, southern California, are part of an important regional fault system that extends for about 206 km, from near the city of Los Angeles westward along the south flank of the Santa Monica Mountains and through the northern Channel Islands. This boundary fault system separates the western Transverse Ranges, on the north, from the California Continental...
Authors
M. A. Fisher, V.E. Langenheim, C.C. Sorlien, P. Dartnell, R. W. Sliter, G.R. Cochrane, F. L. Wong
Geophysical evidence for wedging in the San Gorgonio Pass structural knot, southern San Andreas fault zone, southern California Geophysical evidence for wedging in the San Gorgonio Pass structural knot, southern San Andreas fault zone, southern California
Geophysical data and surface geology define intertonguing thrust wedges that form the upper crust in the San Gorgonio Pass region. This picture serves as the basis for inferring past fault movements within the San Andreas system, which are fundamental to understanding the tectonic evolution of the San Gorgonio Pass region. Interpretation of gravity data indicates that sedimentary rocks...
Authors
V.E. Langenheim, R.C. Jachens, J. C. Matti, E. Hauksson, D. M. Morton, A. Christensen
Isostatic residual gravity map of The Santa Clara Valley and vicinity, California Isostatic residual gravity map of The Santa Clara Valley and vicinity, California
No abstract available.
Authors
Carter W. Roberts, Robert C. Jachens, David A. Ponce, Victoria E. Langenheim
Marine geology and earthquake hazards of the San Pedro Shelf region, southern California Marine geology and earthquake hazards of the San Pedro Shelf region, southern California
High-resolution seismic-reflection data have been com- bined with a variety of other geophysical and geological data to interpret the offshore structure and earthquake hazards of the San Pedro Shelf, near Los Angeles, California. Prominent structures investigated include the Wilmington Graben, the Palos Verdes Fault Zone, various faults below the western part of the shelf and slope, and...
Authors
Michael A. Fisher, William R. Normark, Victoria E. Langenheim, Andrew J. Calvert, Ray Sliter
Geophysical and isotopic mapping of preexisting crustal structures that influenced the location and development of the San Jacinto fault zone, southern California Geophysical and isotopic mapping of preexisting crustal structures that influenced the location and development of the San Jacinto fault zone, southern California
We examine the role of preexisting crustal structure within the Peninsular Ranges batholith on determining the location of the San Jacinto fault zone by analysis of geophysical anomalies and initial strontium ratio data. A 1000-km-long boundary within the Peninsular Ranges batholith, separating relatively mafic, dense, and magnetic rocks of the western Peninsular Ranges batholith from...
Authors
V.E. Langenheim, R.C. Jachens, D. M. Morton, R. W. Kistler, J. C. Matti
Upper crustal structure from the Santa Monica Mountains to the Sierra Nevada, Southern California: Tomographic results from the Los Angeles Regional Seismic Experiment, Phase II (LARSE II) Upper crustal structure from the Santa Monica Mountains to the Sierra Nevada, Southern California: Tomographic results from the Los Angeles Regional Seismic Experiment, Phase II (LARSE II)
In 1999, the U.S. Geological Survey and the Southern California Earthquake Center (SCEC) collected refraction and low-fold reflection data along a 150-km-long corridor extending from the Santa Monica Mountains northward to the Sierra Nevada. This profile was part of the second phase of the Los Angeles Region Seismic Experiment (LARSE II). Chief imaging targets included sedimentary basins...
Authors
W. J. Lutter, G. S. Fuis, T. Ryberg, D. A. Okaya, R.W. Clayton, P.M. Davis, C. Prodehl, J.M. Murphy, V.E. Langenheim, M.L. Benthien, N. J. Godfrey, N.I. Christensen, K. Thygesen, C.H. Thurber, G. Simila, Gordon R. Keller
The offshore Palos Verdes fault zone near San Pedro, Southern California The offshore Palos Verdes fault zone near San Pedro, Southern California
High-resolution seismic-reflection data are combined with a variety of other geophysical and geological data to interpret the offshore structure and earthquake hazards of the San Pedro shelf, near Los Angeles, California. Prominent structures investigated include the Wilmington graben, the Palos Verdes fault zone, various faults below the west part of the San Pedro shelf and slope, and...
Authors
M. A. Fisher, W. R. Normark, V.E. Langenheim, A.J. Calvert, R. Sliter
Isostatic gravity map with simplified geology of the Los Angeles 30 x 60 minute quadrangle Isostatic gravity map with simplified geology of the Los Angeles 30 x 60 minute quadrangle
This isostatic residual gravity map is part of the Southern California Areal Mapping Project (SCAMP) and is intended to promote further understanding of the geology in the Los Angeles 30 x 60 minute quadrangle, California, by serving as a basis for geophysical interpretations and by supporting both geological mapping and topical (especially earthquake) studies. Local spatial variations...
Authors
R .J. Wooley, R. F. Yerkes, V.E. Langenheim, F. C. Chuang
Crustal structure of the Peninsular Ranges batholith from magnetic data: Implications for Gulf of California rifting Crustal structure of the Peninsular Ranges batholith from magnetic data: Implications for Gulf of California rifting
A 70-km-wide belt of magnetic highs extends ???1200 km northwest from the southern tip of the Baja California peninsula into southern California. The anomalies are caused by the mafic western belt of the Peninsular Ranges batholith, which is exposed extensively along the northern 800 km length of the magnetic belt. Modeling indicates that the source of the anomalies extends to mid-to...
Authors
V.E. Langenheim, R.C. Jachens
Isostatic gravity map of the Monterey 30' x 60' quadrangle and adjacent areas, California Isostatic gravity map of the Monterey 30' x 60' quadrangle and adjacent areas, California
The digital dataset consists of one file (monterey_100k.iso) containing 2,385 gravity stations. The file, monterey_100k.iso, contains the principal facts of the gravity stations, with one point coded per line. The format of the data is described below. Each gravity station has a station name, location (latitude and longitude, NAD27 projection), elevation, and an observed gravity reading...
Authors
V.E. Langenheim, S. R. Stiles, R.C. Jachens
Preliminary report on geophysical data in Yavapai County, Arizona Preliminary report on geophysical data in Yavapai County, Arizona
Recently acquired geophysical data provide information on the geologic framework and its effect of groundwater flow and on stream/aquifer interaction in Yavapai County, Arizona. High-resolution aeromagnetic data reflect diverse rock types at and below the topographic surface and have permitted a preliminary interpretation of faults and underlying rock types (in particular, volcanic) that...
Authors
V.E. Langenheim, J.P. Hoffmann, K.W. Blasch, Ed DeWitt, Laurie Wirt
Aeromagnetic Expression of Buried Basaltic Volcanoes Near Yucca Mountain, Nevada Aeromagnetic Expression of Buried Basaltic Volcanoes Near Yucca Mountain, Nevada
A high-resolution aeromagnetic survey has defined a number of small dipolar anomalies indicating the presence of magnetic bodies buried beneath the surface of Crater Flat and the Amargosa Desert. Results of potential-field modeling indicate that isolated, small-volume, highly magnetic bodies embedded within the alluvial deposits of both areas produce the anomalies. Their physical...
Authors
Dennis W. O’Leary, E. A. Mankinen, R.J. Blakely, V.E. Langenheim, D. A. Ponce