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Thomas J Casadevall

Tom Casadevall is a Scientist Emeritus with the Geology, Geophysics, and Geochemistry Science Center.

Science and Products

Filter Total Items: 39

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
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

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
By
Volcano Hazards Program, Volcano Science Center, Geology, Geophysics, and Geochemistry Science Center

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
By
Geology, Minerals, Energy, and Geophysics Science Center

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
By
Volcano Hazards Program, Volcano Science Center

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
By
Natural Hazards Mission Area, Volcano Hazards Program, Volcano Science Center

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
By
Natural Hazards Mission Area, Volcano Hazards Program, Volcano Science Center
This color photograph shows a view of the red and cream-colored, flat-lying sedimentary rocks in the Grand Canyon. On the left,

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...
By
National Cooperative Geologic Mapping Program, Geology, Energy & Minerals Science Center
Geoheritage Sites of the Nation

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...
Learn More

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...
By
National Cooperative Geologic Mapping Program, Geology, Energy & Minerals Science Center, Geosciences and Environmental Change Science Center

World map of volcanoes and principal aeronautical features World map of volcanoes and principal aeronautical features

No abstract available.

World map of volcanoes and principal aeronautical features World map of volcanoes and principal aeronautical features

No abstract available.
By
Natural Hazards Mission Area, Volcano Hazards Program, Volcano Science Center

Science and Products

Filter Total Items: 39

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
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

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
By
Volcano Hazards Program, Volcano Science Center, Geology, Geophysics, and Geochemistry Science Center

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
By
Geology, Minerals, Energy, and Geophysics Science Center

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
By
Volcano Hazards Program, Volcano Science Center

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
By
Natural Hazards Mission Area, Volcano Hazards Program, Volcano Science Center

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
By
Natural Hazards Mission Area, Volcano Hazards Program, Volcano Science Center
This color photograph shows a view of the red and cream-colored, flat-lying sedimentary rocks in the Grand Canyon. On the left,

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...
By
National Cooperative Geologic Mapping Program, Geology, Energy & Minerals Science Center
Geoheritage Sites of the Nation

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...
Learn More

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...
By
National Cooperative Geologic Mapping Program, Geology, Energy & Minerals Science Center, Geosciences and Environmental Change Science Center

World map of volcanoes and principal aeronautical features World map of volcanoes and principal aeronautical features

No abstract available.

World map of volcanoes and principal aeronautical features World map of volcanoes and principal aeronautical features

No abstract available.
By
Natural Hazards Mission Area, Volcano Hazards Program, Volcano Science Center
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