Thomas J Casadevall
Tom Casadevall is a Scientist Emeritus with the Geology, Geophysics, and Geochemistry Science Center.
Science and Products
Geoheritage Sites of the Nation
Geoheritage is a value-laden term that is applied to features and landforms of geologic significance and includes the scientific, educational, cultural, economic, and aesthetic values that society places on them (Brilha, 2018; GSA, 2017; NASEM, 2021; NPS and AGI, 2015). The goal of the Geoheritage Sites of the Nation project is to develop an inventory of geoheritage sites that showcase the...
Geoheritage Sites of the Nation Data Release v.1 Geoheritage Sites of the Nation Data Release v.1
Geoheritage is a term which lies at the intersection of science, society, and sustainability and is applied to significant geologic features and landforms that have scientific, educational, cultural, economic, and aesthetic value. Many geologic sites have enriched society through the geoheritage values: scientific research and education, cultural significance, economic opportunities, and...
Filter Total Items: 41
U.S. Geological Survey geoheritage sites of the nation: Broadening the relevance of geologic mapping through the intersection of geology and society U.S. Geological Survey geoheritage sites of the nation: Broadening the relevance of geologic mapping through the intersection of geology and society
Geoheritage lies at the intersection of geology and society (NASEM 2021). It is a value-laden term applied to geologically significant features and landforms to highlight the scientific, educational, cultural, economic, and aesthetic values that society places on them (Brilha 2018, GSA 2017, NPS and AGI 2015). The U.S. Geological Survey (USGS) National Cooperative Geologic Mapping...
Authors
Christina A. DeVera, D. Paco Van Sistine, Thomas J. Casadevall, Timothy C. Henderson, Leslie F. Ruppert
Stories in stone: The geoheritage significance of U.S. National Park Service stratotypes Stories in stone: The geoheritage significance of U.S. National Park Service stratotypes
The U.S. National Park Service stratotype inventory has systematically documented hundreds of published stratotypes across the country that represent a quintessential component of America’s geoheritage and possess significant scientific, educational, cultural, historic, and aesthetic values. As valuable geologic reference standards, stratotypes record intervals of Earth history relating...
Authors
Timothy C. Henderson, Vincent L. Santucci, Justin S. Tweet, Christina A. DeVera, Leslie F. Ruppert, D. Paco Van Sistine, Thomas J. Casadevall, Tim Connors
Evidence for a high-level porphyritic intrusion below the Sunnyside epithermal vein deposit, Colorado Evidence for a high-level porphyritic intrusion below the Sunnyside epithermal vein deposit, Colorado
High-temperature quartz veins were identified in drill core at ~600 m below the Sunnyside epithermal base and pre-cious metal deposit in southwestern Colorado. The veins consist of early anhedral quartz that shows a bluish ca-thodoluminescence emission and hosts heterogenous silicate melt inclusions. The early quartz is overgrown by a later generation of quartz that exhibits euhedral...
Authors
Mario A. Guzman, Thomas Monecke, T. James Reynolds, Thomas J. Casadevall
Progress in protecting air travel from volcanic ash clouds Progress in protecting air travel from volcanic ash clouds
The Eyjafjallajökull eruption of 2010 demonstrated the far-reaching impact of ash clouds and the vulnerability of our jet-based society to them, prompting a review of procedures to detect, warn, and forecast ash cloud hazards to aviation. The years since 2010 have seen marked improvements in satellite technology, more accurate ash-dispersion models that integrate simulations with...
Authors
Larry G. Mastin, Michael J. Pavolonis, Samantha Engwell, Rory Clarkson, Claire Witham, Greg Brock, Ian Lisk, Marianne C. Guffanti, Andrew C. Tupper, David J. Schneider, Frances Beckett, Thomas J. Casadevall, Graham Rennie
Born of fire: In search of volcanoes in U.S. national parks, four striking examples Born of fire: In search of volcanoes in U.S. national parks, four striking examples
Geologic features, particularly volcanic features, have been protected by the National Park Service since its inception. Some volcanic areas were nationally protected even before the National Park Service was established. The first national park, Yellowstone National Park, is one of the most widely known geothermal and volcanic areas in the world. It contains the largest volcanic complex...
Authors
Laura Walkup, Thomas Casadevall, Vincent L. Santucci
Volcanic ash and aviation–The challenges of real-time, global communication of a natural hazard Volcanic ash and aviation–The challenges of real-time, global communication of a natural hazard
More than 30 years after the first major aircraft encounters with volcanic ash over Indonesia in 1982, it remains challenging to inform aircraft in flight of the exact location of potentially dangerous ash clouds on their flight path, particularly shortly after the eruption has occurred. The difficulties include reliably forecasting and detecting the onset of significant explosive...
Authors
Peter Lechner, Andrew C. Tupper, Marianne C. Guffanti, Sue Loughlin, Thomas Casadevall
Encounters of aircraft with volcanic ash clouds: A compilation of known incidents, 1953-2009 Encounters of aircraft with volcanic ash clouds: A compilation of known incidents, 1953-2009
Information about reported encounters of aircraft with volcanic ash clouds from 1953 through 2009 has been compiled to document the nature and scope of risks to aviation from volcanic activity. The information, gleaned from a variety of published and other sources, is presented in database and spreadsheet formats; the compilation will be updated as additional encounters occur and as new...
Authors
Marianne Guffanti, Thomas J. Casadevall, Karin Budding
Volcanic hazards to airports Volcanic hazards to airports
Volcanic activity has caused significant hazards to numerous airports worldwide, with local to far-ranging effects on travelers and commerce. Analysis of a new compilation of incidents of airports impacted by volcanic activity from 1944 through 2006 reveals that, at a minimum, 101 airports in 28 countries were affected on 171 occasions by eruptions at 46 volcanoes. Since 1980, five...
Authors
Marianne C. Guffanti, Gari C. Mayberry, Thomas J. Casadevall, Richard Wunderman
Compilation of Disruptions to Airports by Volcanic Activity (Version 1.0, 1944-2006) Compilation of Disruptions to Airports by Volcanic Activity (Version 1.0, 1944-2006)
Volcanic activity has caused significant hazards to numerous airports worldwide, with local to far-ranging effects on travelers and commerce. To more fully characterize the nature and scope of volcanic hazards to airports, we collected data on incidents of airports throughout the world that have been affected by volcanic activity, beginning in 1944 with the first documented instance of...
Authors
Marianne Guffanti, Gari C. Mayberry, Thomas J. Casadevall, Richard Wunderman
Preliminary analytical results for a mud sample collected from the LUSI Mud Volcano, Sidoarjo, East Java, Indonesia Preliminary analytical results for a mud sample collected from the LUSI Mud Volcano, Sidoarjo, East Java, Indonesia
On May 29, 2006, mud and gases began erupting unexpectedly from a vent 150 meters away from a hydrocarbon exploration well near Sidoarjo, East Java, Indonesia. The eruption, called the LUSI (Lumpur 'mud'-Sidoarjo) mud volcano, has continued since then at rates as high as 160,000 m3 per day. At the request of the United States Department of State, the U.S. Geological Survey (USGS) has...
Authors
Geoffrey S. Plumlee, Thomas J. Casadevall, Handoko T. Wibowo, Robert J. Rosenbauer, Craig A. Johnson, George N. Breit, Heather Lowers, Ruth E. Wolf, Philip L. Hageman, Harland L. Goldstein, Michael W. Anthony, Cyrus J. Berry, David L. Fey, Gregory P. Meeker, Suzette A. Morman
Ground deformation at Merapi Volcano, Java, Indonesia: distance changes, June 1988-October 1995 Ground deformation at Merapi Volcano, Java, Indonesia: distance changes, June 1988-October 1995
Edifice deformations are reported here for the period 1988–1995 at Merapi volcano, one of the most active and dangerous volcanoes in Indonesia. The study period includes a major resumption in lava effusion in January 1992 and a major dome collapse in November 1994. The data comprise electronic distance measurements (EDM) on a summit trilateration network, slope distance changes measured...
Authors
K.D. Young, B. Voight, T. J. Casadevall
Monitoring so2 emission at the Soufriere Hills volcano: Implications for changes in eruptive conditions Monitoring so2 emission at the Soufriere Hills volcano: Implications for changes in eruptive conditions
Correlation spectrometer measurements of sulfur dioxide (SO2) emission rates during the current eruption of the Soufriere Hills volcano, Montserrat, have contributed towards identifying different phases of volcanic activity. SO2 emission rate has increased from
Authors
S.R. Young, P.W. Francis, J. Barclay, T. J. Casadevall, C. A. Gardner, B. Darroux, M. A. Davies, P. Delmelle, G.E. Norton, A.J.H. Maciejewski, C.M.M. Oppenheimer, J. Stix, I.M. Watson
Science and Products
Geoheritage Sites of the Nation
Geoheritage is a value-laden term that is applied to features and landforms of geologic significance and includes the scientific, educational, cultural, economic, and aesthetic values that society places on them (Brilha, 2018; GSA, 2017; NASEM, 2021; NPS and AGI, 2015). The goal of the Geoheritage Sites of the Nation project is to develop an inventory of geoheritage sites that showcase the...
Geoheritage Sites of the Nation Data Release v.1 Geoheritage Sites of the Nation Data Release v.1
Geoheritage is a term which lies at the intersection of science, society, and sustainability and is applied to significant geologic features and landforms that have scientific, educational, cultural, economic, and aesthetic value. Many geologic sites have enriched society through the geoheritage values: scientific research and education, cultural significance, economic opportunities, and...
Filter Total Items: 41
U.S. Geological Survey geoheritage sites of the nation: Broadening the relevance of geologic mapping through the intersection of geology and society U.S. Geological Survey geoheritage sites of the nation: Broadening the relevance of geologic mapping through the intersection of geology and society
Geoheritage lies at the intersection of geology and society (NASEM 2021). It is a value-laden term applied to geologically significant features and landforms to highlight the scientific, educational, cultural, economic, and aesthetic values that society places on them (Brilha 2018, GSA 2017, NPS and AGI 2015). The U.S. Geological Survey (USGS) National Cooperative Geologic Mapping...
Authors
Christina A. DeVera, D. Paco Van Sistine, Thomas J. Casadevall, Timothy C. Henderson, Leslie F. Ruppert
Stories in stone: The geoheritage significance of U.S. National Park Service stratotypes Stories in stone: The geoheritage significance of U.S. National Park Service stratotypes
The U.S. National Park Service stratotype inventory has systematically documented hundreds of published stratotypes across the country that represent a quintessential component of America’s geoheritage and possess significant scientific, educational, cultural, historic, and aesthetic values. As valuable geologic reference standards, stratotypes record intervals of Earth history relating...
Authors
Timothy C. Henderson, Vincent L. Santucci, Justin S. Tweet, Christina A. DeVera, Leslie F. Ruppert, D. Paco Van Sistine, Thomas J. Casadevall, Tim Connors
Evidence for a high-level porphyritic intrusion below the Sunnyside epithermal vein deposit, Colorado Evidence for a high-level porphyritic intrusion below the Sunnyside epithermal vein deposit, Colorado
High-temperature quartz veins were identified in drill core at ~600 m below the Sunnyside epithermal base and pre-cious metal deposit in southwestern Colorado. The veins consist of early anhedral quartz that shows a bluish ca-thodoluminescence emission and hosts heterogenous silicate melt inclusions. The early quartz is overgrown by a later generation of quartz that exhibits euhedral...
Authors
Mario A. Guzman, Thomas Monecke, T. James Reynolds, Thomas J. Casadevall
Progress in protecting air travel from volcanic ash clouds Progress in protecting air travel from volcanic ash clouds
The Eyjafjallajökull eruption of 2010 demonstrated the far-reaching impact of ash clouds and the vulnerability of our jet-based society to them, prompting a review of procedures to detect, warn, and forecast ash cloud hazards to aviation. The years since 2010 have seen marked improvements in satellite technology, more accurate ash-dispersion models that integrate simulations with...
Authors
Larry G. Mastin, Michael J. Pavolonis, Samantha Engwell, Rory Clarkson, Claire Witham, Greg Brock, Ian Lisk, Marianne C. Guffanti, Andrew C. Tupper, David J. Schneider, Frances Beckett, Thomas J. Casadevall, Graham Rennie
Born of fire: In search of volcanoes in U.S. national parks, four striking examples Born of fire: In search of volcanoes in U.S. national parks, four striking examples
Geologic features, particularly volcanic features, have been protected by the National Park Service since its inception. Some volcanic areas were nationally protected even before the National Park Service was established. The first national park, Yellowstone National Park, is one of the most widely known geothermal and volcanic areas in the world. It contains the largest volcanic complex...
Authors
Laura Walkup, Thomas Casadevall, Vincent L. Santucci
Volcanic ash and aviation–The challenges of real-time, global communication of a natural hazard Volcanic ash and aviation–The challenges of real-time, global communication of a natural hazard
More than 30 years after the first major aircraft encounters with volcanic ash over Indonesia in 1982, it remains challenging to inform aircraft in flight of the exact location of potentially dangerous ash clouds on their flight path, particularly shortly after the eruption has occurred. The difficulties include reliably forecasting and detecting the onset of significant explosive...
Authors
Peter Lechner, Andrew C. Tupper, Marianne C. Guffanti, Sue Loughlin, Thomas Casadevall
Encounters of aircraft with volcanic ash clouds: A compilation of known incidents, 1953-2009 Encounters of aircraft with volcanic ash clouds: A compilation of known incidents, 1953-2009
Information about reported encounters of aircraft with volcanic ash clouds from 1953 through 2009 has been compiled to document the nature and scope of risks to aviation from volcanic activity. The information, gleaned from a variety of published and other sources, is presented in database and spreadsheet formats; the compilation will be updated as additional encounters occur and as new...
Authors
Marianne Guffanti, Thomas J. Casadevall, Karin Budding
Volcanic hazards to airports Volcanic hazards to airports
Volcanic activity has caused significant hazards to numerous airports worldwide, with local to far-ranging effects on travelers and commerce. Analysis of a new compilation of incidents of airports impacted by volcanic activity from 1944 through 2006 reveals that, at a minimum, 101 airports in 28 countries were affected on 171 occasions by eruptions at 46 volcanoes. Since 1980, five...
Authors
Marianne C. Guffanti, Gari C. Mayberry, Thomas J. Casadevall, Richard Wunderman
Compilation of Disruptions to Airports by Volcanic Activity (Version 1.0, 1944-2006) Compilation of Disruptions to Airports by Volcanic Activity (Version 1.0, 1944-2006)
Volcanic activity has caused significant hazards to numerous airports worldwide, with local to far-ranging effects on travelers and commerce. To more fully characterize the nature and scope of volcanic hazards to airports, we collected data on incidents of airports throughout the world that have been affected by volcanic activity, beginning in 1944 with the first documented instance of...
Authors
Marianne Guffanti, Gari C. Mayberry, Thomas J. Casadevall, Richard Wunderman
Preliminary analytical results for a mud sample collected from the LUSI Mud Volcano, Sidoarjo, East Java, Indonesia Preliminary analytical results for a mud sample collected from the LUSI Mud Volcano, Sidoarjo, East Java, Indonesia
On May 29, 2006, mud and gases began erupting unexpectedly from a vent 150 meters away from a hydrocarbon exploration well near Sidoarjo, East Java, Indonesia. The eruption, called the LUSI (Lumpur 'mud'-Sidoarjo) mud volcano, has continued since then at rates as high as 160,000 m3 per day. At the request of the United States Department of State, the U.S. Geological Survey (USGS) has...
Authors
Geoffrey S. Plumlee, Thomas J. Casadevall, Handoko T. Wibowo, Robert J. Rosenbauer, Craig A. Johnson, George N. Breit, Heather Lowers, Ruth E. Wolf, Philip L. Hageman, Harland L. Goldstein, Michael W. Anthony, Cyrus J. Berry, David L. Fey, Gregory P. Meeker, Suzette A. Morman
Ground deformation at Merapi Volcano, Java, Indonesia: distance changes, June 1988-October 1995 Ground deformation at Merapi Volcano, Java, Indonesia: distance changes, June 1988-October 1995
Edifice deformations are reported here for the period 1988–1995 at Merapi volcano, one of the most active and dangerous volcanoes in Indonesia. The study period includes a major resumption in lava effusion in January 1992 and a major dome collapse in November 1994. The data comprise electronic distance measurements (EDM) on a summit trilateration network, slope distance changes measured...
Authors
K.D. Young, B. Voight, T. J. Casadevall
Monitoring so2 emission at the Soufriere Hills volcano: Implications for changes in eruptive conditions Monitoring so2 emission at the Soufriere Hills volcano: Implications for changes in eruptive conditions
Correlation spectrometer measurements of sulfur dioxide (SO2) emission rates during the current eruption of the Soufriere Hills volcano, Montserrat, have contributed towards identifying different phases of volcanic activity. SO2 emission rate has increased from
Authors
S.R. Young, P.W. Francis, J. Barclay, T. J. Casadevall, C. A. Gardner, B. Darroux, M. A. Davies, P. Delmelle, G.E. Norton, A.J.H. Maciejewski, C.M.M. Oppenheimer, J. Stix, I.M. Watson