James A Smith
James A Smith is a Geophysicist with the Earthquake Hazards Program.
Science and Products
Filter Total Items: 88
Boll weevil eradication: a model for sea lamprey control? Boll weevil eradication: a model for sea lamprey control?
Invasions of boll weevil (Anthonomus grandis) into the United States and sea lamprey (Petromyzon marinus) into the Great Lakes were similar in many ways. Important species (American cotton, Gossypium hirsutum, and lake trout, Salvelinus namaycush) and the industries they supported were negatively affected. Initial control efforts were unsuccessful until pesticides and application...
Authors
James Smith, William Swink
State of flood plain vegetation within the meander belt of the Clark Fork of the Columbia River, Deer Lodge Valley, Montana State of flood plain vegetation within the meander belt of the Clark Fork of the Columbia River, Deer Lodge Valley, Montana
No abstract available.
Authors
Eleanor Griffin, James Smith
Relation between geomorphic stability and the density of large shrubs on the flood plain of the Clark Fork of the Columbia River in the Deer Lodge Valley, Montana Relation between geomorphic stability and the density of large shrubs on the flood plain of the Clark Fork of the Columbia River in the Deer Lodge Valley, Montana
No abstract available.
Authors
James Smith, Eleanor Griffin
Analysis of vegetation controls on bank erosion rates, Clark Fork of the Columbia River, Deer Lodge Valley, Montana Analysis of vegetation controls on bank erosion rates, Clark Fork of the Columbia River, Deer Lodge Valley, Montana
No abstract available.
Authors
Eleanor Griffin, James Smith
Impacts of cowbird parasitism on wood thrushes and other neotropical migrants in suburban Maryland forests Impacts of cowbird parasitism on wood thrushes and other neotropical migrants in suburban Maryland forests
During 1988-1993, we monitored nests of neotropical migrant birds in seven suburban Maryland forests to compare parasitism and predation rates in forests of different areas. Of 1,122 nests monitored, 672 were of Wood Thrush, the most commonly found nesting species. Study sites were forests that ranged in size from 21 ha to more than 1,300 ha in the Piedmont and Coastal Plain regions of...
Authors
B.A. Dowell, J.E. Fallon, C.S. Robbins, D.K. Dawson, F.W. Fallon
Cowbird parasitism in grassland and cropland in the northern Great Plains Cowbird parasitism in grassland and cropland in the northern Great Plains
The landscape of the Great Plains has been greatly altered by human activities in the past century, and several grassland passerines have experienced significant population declines in recent decades. We explore here whether brood parasitism by Brown-headed Cowbirds, which are abundant in the Great Plains, has contributed to these declines. We measured the frequency of cowbird parasitism...
Authors
Rolf Koford, B. Bowen, John Lokemoen, Arnold Kruse
A geochemical reconnaissance of the Alid volcanic center and geothermal system, Danakil depression, Eritrea A geochemical reconnaissance of the Alid volcanic center and geothermal system, Danakil depression, Eritrea
Geological and geochemical studies indicate that a high-temperature geothermal system underlies the Alid volcanic center in the northern Danakil depression of Eritrea. Alid is a very late-Pleistocene structural dome formed by shallow intrusion of rhyolitic magma, some of which vented as lavas and pyroclastic flows. Fumaroles and boiling pools distributed widely over an area of ~10 km2 on...
Authors
J. Lowenstern, C. Janik, R.O. Fournier, T. Tesfai, W. Duffield, M.A. Clynne, James G. Smith, L. Woldegiorgis, K. Weldemariam, G. Kahsai
3-Dimensional visualization of the Medicine Lake Highland, CA: Topography, geology, geophysics, and hydrology 3-Dimensional visualization of the Medicine Lake Highland, CA: Topography, geology, geophysics, and hydrology
No abstract available.
Authors
J. Lowenstern, Michele Killgore, Robert Mariner, R.J. Blakely, James G. Smith, J.M. Donnelly-Nolan
Geothermal potential of the Alid Volcanic Center, Danakil Depression, Eritrea Geothermal potential of the Alid Volcanic Center, Danakil Depression, Eritrea
No abstract available.
Authors
W. Duffield, T.D. Bullen, M.A. Clynne, R.O. Fournier, C. Janik, M. Lanphere, Jacob Lowenstern, James G. Smith, L.W. Giorgis, Gabreab Kahsai, K.W. Mariam, Theoderos Tesfai
Gravity anomalies, Quaternary vents, and Quaternary faults in the southern Cascade Range, Oregon and California: Implications for arc and backarc evolution Gravity anomalies, Quaternary vents, and Quaternary faults in the southern Cascade Range, Oregon and California: Implications for arc and backarc evolution
Isostatic residual gravity anomalies in the southern Cascade Range of northern California and southern Oregon are spatially correlated with broad zones of Quaternary magmatism as reflected by the total volume of Quaternary volcanic products, the distribution of Quaternary vents, and the anomalously low teleseismic P wave velocities in the upper 30 km of crust. The orientation of...
Authors
R.J. Blakely, R.L. Christiansen, M. Guffanti, R.E. Wells, J.M. Donnelly-Nolan, L.J. Muffler, M.A. Clynne, James G. Smith
Quantification of natural vapor fluxes of trichloroethene in the unsaturated zone at Picatinny Arsenal, New Jersey Quantification of natural vapor fluxes of trichloroethene in the unsaturated zone at Picatinny Arsenal, New Jersey
The upward flux of trichloroethene (TCE) vapor through the unsaturated zone above a contaminated, water-table aquifer at Picatinny Arsenal, New Jersey, has been studied under natural conditions over a 12-month period. Vertical gas-phase diffusion fluxes were estimated indirectly by measuring the TCE vapor concentration gradient in the unsaturated zone and using Fick's law to calculate...
Authors
James A. Smith, Amy Tisdale, H. Cho
Geology and geothermal potential of Alid volcanic center, Eritrea, Africa Geology and geothermal potential of Alid volcanic center, Eritrea, Africa
Alid volcanic center, a 700-meter-tall mountain in Eritrea, northeast Africa, straddles the axis of an active crustal-spreading center called the Danakil Depression. Boiling-temperature fumaroles are common on Alid, and their gas compositions indicate a reservoir temperature of at least 250 ??C. The history of volcanism and the high reservoir temperature indicated by the Alid fumarole...
Authors
Michael Clynne, Wendell Duffield, Robert Fournier, Leake Giorgis, Cathy Janik, Gabreab Kahsai, Jacob Lowenstern, Kidane Mariam, James G. Smith, Theoderos Tesfai
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 88
Boll weevil eradication: a model for sea lamprey control? Boll weevil eradication: a model for sea lamprey control?
Invasions of boll weevil (Anthonomus grandis) into the United States and sea lamprey (Petromyzon marinus) into the Great Lakes were similar in many ways. Important species (American cotton, Gossypium hirsutum, and lake trout, Salvelinus namaycush) and the industries they supported were negatively affected. Initial control efforts were unsuccessful until pesticides and application...
Authors
James Smith, William Swink
State of flood plain vegetation within the meander belt of the Clark Fork of the Columbia River, Deer Lodge Valley, Montana State of flood plain vegetation within the meander belt of the Clark Fork of the Columbia River, Deer Lodge Valley, Montana
No abstract available.
Authors
Eleanor Griffin, James Smith
Relation between geomorphic stability and the density of large shrubs on the flood plain of the Clark Fork of the Columbia River in the Deer Lodge Valley, Montana Relation between geomorphic stability and the density of large shrubs on the flood plain of the Clark Fork of the Columbia River in the Deer Lodge Valley, Montana
No abstract available.
Authors
James Smith, Eleanor Griffin
Analysis of vegetation controls on bank erosion rates, Clark Fork of the Columbia River, Deer Lodge Valley, Montana Analysis of vegetation controls on bank erosion rates, Clark Fork of the Columbia River, Deer Lodge Valley, Montana
No abstract available.
Authors
Eleanor Griffin, James Smith
Impacts of cowbird parasitism on wood thrushes and other neotropical migrants in suburban Maryland forests Impacts of cowbird parasitism on wood thrushes and other neotropical migrants in suburban Maryland forests
During 1988-1993, we monitored nests of neotropical migrant birds in seven suburban Maryland forests to compare parasitism and predation rates in forests of different areas. Of 1,122 nests monitored, 672 were of Wood Thrush, the most commonly found nesting species. Study sites were forests that ranged in size from 21 ha to more than 1,300 ha in the Piedmont and Coastal Plain regions of...
Authors
B.A. Dowell, J.E. Fallon, C.S. Robbins, D.K. Dawson, F.W. Fallon
Cowbird parasitism in grassland and cropland in the northern Great Plains Cowbird parasitism in grassland and cropland in the northern Great Plains
The landscape of the Great Plains has been greatly altered by human activities in the past century, and several grassland passerines have experienced significant population declines in recent decades. We explore here whether brood parasitism by Brown-headed Cowbirds, which are abundant in the Great Plains, has contributed to these declines. We measured the frequency of cowbird parasitism...
Authors
Rolf Koford, B. Bowen, John Lokemoen, Arnold Kruse
A geochemical reconnaissance of the Alid volcanic center and geothermal system, Danakil depression, Eritrea A geochemical reconnaissance of the Alid volcanic center and geothermal system, Danakil depression, Eritrea
Geological and geochemical studies indicate that a high-temperature geothermal system underlies the Alid volcanic center in the northern Danakil depression of Eritrea. Alid is a very late-Pleistocene structural dome formed by shallow intrusion of rhyolitic magma, some of which vented as lavas and pyroclastic flows. Fumaroles and boiling pools distributed widely over an area of ~10 km2 on...
Authors
J. Lowenstern, C. Janik, R.O. Fournier, T. Tesfai, W. Duffield, M.A. Clynne, James G. Smith, L. Woldegiorgis, K. Weldemariam, G. Kahsai
3-Dimensional visualization of the Medicine Lake Highland, CA: Topography, geology, geophysics, and hydrology 3-Dimensional visualization of the Medicine Lake Highland, CA: Topography, geology, geophysics, and hydrology
No abstract available.
Authors
J. Lowenstern, Michele Killgore, Robert Mariner, R.J. Blakely, James G. Smith, J.M. Donnelly-Nolan
Geothermal potential of the Alid Volcanic Center, Danakil Depression, Eritrea Geothermal potential of the Alid Volcanic Center, Danakil Depression, Eritrea
No abstract available.
Authors
W. Duffield, T.D. Bullen, M.A. Clynne, R.O. Fournier, C. Janik, M. Lanphere, Jacob Lowenstern, James G. Smith, L.W. Giorgis, Gabreab Kahsai, K.W. Mariam, Theoderos Tesfai
Gravity anomalies, Quaternary vents, and Quaternary faults in the southern Cascade Range, Oregon and California: Implications for arc and backarc evolution Gravity anomalies, Quaternary vents, and Quaternary faults in the southern Cascade Range, Oregon and California: Implications for arc and backarc evolution
Isostatic residual gravity anomalies in the southern Cascade Range of northern California and southern Oregon are spatially correlated with broad zones of Quaternary magmatism as reflected by the total volume of Quaternary volcanic products, the distribution of Quaternary vents, and the anomalously low teleseismic P wave velocities in the upper 30 km of crust. The orientation of...
Authors
R.J. Blakely, R.L. Christiansen, M. Guffanti, R.E. Wells, J.M. Donnelly-Nolan, L.J. Muffler, M.A. Clynne, James G. Smith
Quantification of natural vapor fluxes of trichloroethene in the unsaturated zone at Picatinny Arsenal, New Jersey Quantification of natural vapor fluxes of trichloroethene in the unsaturated zone at Picatinny Arsenal, New Jersey
The upward flux of trichloroethene (TCE) vapor through the unsaturated zone above a contaminated, water-table aquifer at Picatinny Arsenal, New Jersey, has been studied under natural conditions over a 12-month period. Vertical gas-phase diffusion fluxes were estimated indirectly by measuring the TCE vapor concentration gradient in the unsaturated zone and using Fick's law to calculate...
Authors
James A. Smith, Amy Tisdale, H. Cho
Geology and geothermal potential of Alid volcanic center, Eritrea, Africa Geology and geothermal potential of Alid volcanic center, Eritrea, Africa
Alid volcanic center, a 700-meter-tall mountain in Eritrea, northeast Africa, straddles the axis of an active crustal-spreading center called the Danakil Depression. Boiling-temperature fumaroles are common on Alid, and their gas compositions indicate a reservoir temperature of at least 250 ??C. The history of volcanism and the high reservoir temperature indicated by the Alid fumarole...
Authors
Michael Clynne, Wendell Duffield, Robert Fournier, Leake Giorgis, Cathy Janik, Gabreab Kahsai, Jacob Lowenstern, Kidane Mariam, James G. Smith, Theoderos Tesfai
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.