Carol A Finn, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 130
Assessment of the mineral resources for the Adel 1 degree by 2 degrees quadrangle, Oregon Assessment of the mineral resources for the Adel 1 degree by 2 degrees quadrangle, Oregon
No abstract available.
Authors
Walter J. Bawiec, Gerda A. Abrams, Carol A. Finn, James A. Pitkin, Jean L. Ryder, Steven M. Smith, Paul K. Theobald, Dean B. Vander Meulen, George W. Walker
Geophysical constraints on Washington convergent margin structure Geophysical constraints on Washington convergent margin structure
Gravity and magnetic maps of western Washington reveal the lateral structure and fabric of the Washington Coast Range, Puget Basin, and southern Washington Cascade Range. The magnetic and gravity maps show large amplitude positive anomalies associated with the shallow but largely buried section of Washington Coast Range mafic rocks which are separated by negative anomalies over deep...
Authors
Carol A. Finn
Tectonics and conductivity structures in the Southern Washington Cascades Tectonics and conductivity structures in the Southern Washington Cascades
The tectonic setting of the southern Washington Cascades has been studied with the aid of magnetotelluric (MT) and other geophysical data. The main feature of interest in the geophysical data is a broad high-conductivity anomaly mapped with MT and geomagnetic variation (GMV) data. This anomaly is located roughly within the triangle formed by the volcanoes Mount Rainier, Mount St. Helens...
Authors
William D. Stanley, Carol A. Finn, Joseph L. Plesha
Evidence from gravity data for an intrusive complex beneath Mount St. Helens Evidence from gravity data for an intrusive complex beneath Mount St. Helens
On the basis of gravity data, aided by aeromagnetic, magnetotelluric, side-looking radar, and geologic information, we tentatively identify a large, shallow intrusive complex beneath Mount St. Helens. The complex is roughly 5–6 km thick and has apparently intruded a buried and compressed Mesozoic forearc sedimentary sequence. The lateral extent of the intrusive complex is uncertain, and...
Authors
David L. Williams, Gerda Abrams, Carol A. Finn, Daniel Dzurisin, Daniel J. Johnson, Roger P. Denlinger
An aeromagnetic study of Mount St. Helens An aeromagnetic study of Mount St. Helens
Aeromagnetic data from surveys flown by the U.S. Geological Survey over Mount St. Helens, Washington, before and after the climactic May 18, 1980, eruption were used to determine the bulk magnetic properties of the volcano and to delineate a buried source. We assumed that most of the edifice of preeruption and posteruption Mount St. Helens has a magnetization direction near the present...
Authors
Carol A. Finn, David L. Williams
Evidence for a shallow pluton beneath the Goat Rocks Wilderness, Washington, from gravity and magnetic data Evidence for a shallow pluton beneath the Goat Rocks Wilderness, Washington, from gravity and magnetic data
A gravity and aeromagnetic study was conducted in and adjacent to the Goat Rocks Wilderness area, Washington. This work was done in conjunction with geologic and geochemical studies which were critically important to our interpretation. The Bouguer gravity anomaly map displays a large central positive gravity anomaly and three superimposed smaller positive anomalies. The main anomaly...
Authors
David L. Williams, Carol A. Finn
Klamath-Blue Mountain lineament, Oregon Klamath-Blue Mountain lineament, Oregon
Regional gravity data clearly show a zone of southwest-northeast lineations across Oregon that defines a major crustal lineament. Its existence is supported by geologic and geophysical data. Its correlation with the northwestern boundaries of the Klamath and Blue Mountain provinces suggests that these are continuous beneath the Cascade volcanic arc. The lineament may represent a pre...
Authors
Robin P. Riddihough, Carol A. Finn, Richard Couch
Analysis of gravity data in volcanic terrain and gravity anomalies and subvolcanic intrusions in the Cascade Range, U.S.A., and at other selected volcanoes Analysis of gravity data in volcanic terrain and gravity anomalies and subvolcanic intrusions in the Cascade Range, U.S.A., and at other selected volcanoes
Gravity data were investigated to reveal the presence of subvolcanic intrusions. With few exceptions, these intrusions produce a detectable gravity anomaly. In the past, these gravity anomalies have often been overlooked or misinterpreted because the data reduction procedure was inadequate. A pragmatic method for reducing and interpreting reconnaissance gravity data from volcanoes as...
Authors
David L. Williams, Carol A. Finn
Principal facts for two-hundred-thirty-three gravity stations near the Three Sisters Wilderness Area, Oregon Principal facts for two-hundred-thirty-three gravity stations near the Three Sisters Wilderness Area, Oregon
No abstract available.
Authors
Carol A. Finn, D.R. Spydell, D.L. Williams
Principal facts for gravity stations in the vicinity of Creede, Mineral County, Colorado Principal facts for gravity stations in the vicinity of Creede, Mineral County, Colorado
No abstract available.
Authors
G. A. Abrams, D.L. Williams, C. A. Finn, J. D. Hendricks, S. S. Priest
Principal facts for two-hundred-thirty-five gravity stations near Craters of the Moon, Idaho Principal facts for two-hundred-thirty-five gravity stations near Craters of the Moon, Idaho
No abstract available.
Authors
Carol A. Finn, D.R. Spydell, D.L. Williams
Gravity maps of the State of Washington and adjacent areas (scale 1:250,000) Gravity maps of the State of Washington and adjacent areas (scale 1:250,000)
No abstract available.
Authors
Carol A. Finn, W.M. Phillips, D.L. Williams
Science and Products
Filter Total Items: 130
Assessment of the mineral resources for the Adel 1 degree by 2 degrees quadrangle, Oregon Assessment of the mineral resources for the Adel 1 degree by 2 degrees quadrangle, Oregon
No abstract available.
Authors
Walter J. Bawiec, Gerda A. Abrams, Carol A. Finn, James A. Pitkin, Jean L. Ryder, Steven M. Smith, Paul K. Theobald, Dean B. Vander Meulen, George W. Walker
Geophysical constraints on Washington convergent margin structure Geophysical constraints on Washington convergent margin structure
Gravity and magnetic maps of western Washington reveal the lateral structure and fabric of the Washington Coast Range, Puget Basin, and southern Washington Cascade Range. The magnetic and gravity maps show large amplitude positive anomalies associated with the shallow but largely buried section of Washington Coast Range mafic rocks which are separated by negative anomalies over deep...
Authors
Carol A. Finn
Tectonics and conductivity structures in the Southern Washington Cascades Tectonics and conductivity structures in the Southern Washington Cascades
The tectonic setting of the southern Washington Cascades has been studied with the aid of magnetotelluric (MT) and other geophysical data. The main feature of interest in the geophysical data is a broad high-conductivity anomaly mapped with MT and geomagnetic variation (GMV) data. This anomaly is located roughly within the triangle formed by the volcanoes Mount Rainier, Mount St. Helens...
Authors
William D. Stanley, Carol A. Finn, Joseph L. Plesha
Evidence from gravity data for an intrusive complex beneath Mount St. Helens Evidence from gravity data for an intrusive complex beneath Mount St. Helens
On the basis of gravity data, aided by aeromagnetic, magnetotelluric, side-looking radar, and geologic information, we tentatively identify a large, shallow intrusive complex beneath Mount St. Helens. The complex is roughly 5–6 km thick and has apparently intruded a buried and compressed Mesozoic forearc sedimentary sequence. The lateral extent of the intrusive complex is uncertain, and...
Authors
David L. Williams, Gerda Abrams, Carol A. Finn, Daniel Dzurisin, Daniel J. Johnson, Roger P. Denlinger
An aeromagnetic study of Mount St. Helens An aeromagnetic study of Mount St. Helens
Aeromagnetic data from surveys flown by the U.S. Geological Survey over Mount St. Helens, Washington, before and after the climactic May 18, 1980, eruption were used to determine the bulk magnetic properties of the volcano and to delineate a buried source. We assumed that most of the edifice of preeruption and posteruption Mount St. Helens has a magnetization direction near the present...
Authors
Carol A. Finn, David L. Williams
Evidence for a shallow pluton beneath the Goat Rocks Wilderness, Washington, from gravity and magnetic data Evidence for a shallow pluton beneath the Goat Rocks Wilderness, Washington, from gravity and magnetic data
A gravity and aeromagnetic study was conducted in and adjacent to the Goat Rocks Wilderness area, Washington. This work was done in conjunction with geologic and geochemical studies which were critically important to our interpretation. The Bouguer gravity anomaly map displays a large central positive gravity anomaly and three superimposed smaller positive anomalies. The main anomaly...
Authors
David L. Williams, Carol A. Finn
Klamath-Blue Mountain lineament, Oregon Klamath-Blue Mountain lineament, Oregon
Regional gravity data clearly show a zone of southwest-northeast lineations across Oregon that defines a major crustal lineament. Its existence is supported by geologic and geophysical data. Its correlation with the northwestern boundaries of the Klamath and Blue Mountain provinces suggests that these are continuous beneath the Cascade volcanic arc. The lineament may represent a pre...
Authors
Robin P. Riddihough, Carol A. Finn, Richard Couch
Analysis of gravity data in volcanic terrain and gravity anomalies and subvolcanic intrusions in the Cascade Range, U.S.A., and at other selected volcanoes Analysis of gravity data in volcanic terrain and gravity anomalies and subvolcanic intrusions in the Cascade Range, U.S.A., and at other selected volcanoes
Gravity data were investigated to reveal the presence of subvolcanic intrusions. With few exceptions, these intrusions produce a detectable gravity anomaly. In the past, these gravity anomalies have often been overlooked or misinterpreted because the data reduction procedure was inadequate. A pragmatic method for reducing and interpreting reconnaissance gravity data from volcanoes as...
Authors
David L. Williams, Carol A. Finn
Principal facts for two-hundred-thirty-three gravity stations near the Three Sisters Wilderness Area, Oregon Principal facts for two-hundred-thirty-three gravity stations near the Three Sisters Wilderness Area, Oregon
No abstract available.
Authors
Carol A. Finn, D.R. Spydell, D.L. Williams
Principal facts for gravity stations in the vicinity of Creede, Mineral County, Colorado Principal facts for gravity stations in the vicinity of Creede, Mineral County, Colorado
No abstract available.
Authors
G. A. Abrams, D.L. Williams, C. A. Finn, J. D. Hendricks, S. S. Priest
Principal facts for two-hundred-thirty-five gravity stations near Craters of the Moon, Idaho Principal facts for two-hundred-thirty-five gravity stations near Craters of the Moon, Idaho
No abstract available.
Authors
Carol A. Finn, D.R. Spydell, D.L. Williams
Gravity maps of the State of Washington and adjacent areas (scale 1:250,000) Gravity maps of the State of Washington and adjacent areas (scale 1:250,000)
No abstract available.
Authors
Carol A. Finn, W.M. Phillips, D.L. Williams
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government