Jason Christopher Willett
Minerals Information commodity specialists collect and analyze information on production, trade, and consumption of minerals from raw material through refining to finished products. Mineral commodity specialists can answer questions on these aspects of a mineral commodity.
I began my career with the U.S. Geological Survey after earning an Associate of Arts degree from Prince George’s Community College. Initially hired as a GS-3, I focused on coal quality topics within the Energy Resources Team. Over the years, I have gained diverse experience in various roles, including geochemist, lab technician, mineralogist, presentation specialist, webmaster, and tool pusher on a drill rig. To further develop my expertise, I participated in coursework and programs at several institutions, including George Mason University, James Madison University, Lehigh University, the University of Kentucky, the University of Maryland, and West Virginia University. In 2024, I joined the Minerals Information Team. Throughout my career, I have worked with a diverse array of industrial minerals, including cement, clays, construction sand and gravel, crushed stone, dimension stone, industrial sand and gravel, kyanite, lime, mica, potash, and vermiculite.
Science and Products
Historical statistics
Historical statistics
2025 Critical Minerals List
2025 Critical Minerals List
Filter Total Items: 28
Mineral resource of the month: aggregates Mineral resource of the month: aggregates
Crushed stone and construction sand and gravel, the two major types of natural aggregates, are among the most abundant and accessible natural resources on the planet. The earliest civilizations used aggregates for various purposes, mainly construction. Today aggregates provide the basic raw materials for the foundation of modern society.
Authors
Jason C. Willett
A review of the lignite resources of Arkansas A review of the lignite resources of Arkansas
This review of the lignite resources of Arkansas is a part of the U.S. Geological Survey's (USGS) National Coal Resource Assessment (NCRA) of the Gulf Coastal Plain Coal Province, which also includes coal-bearing areas in the states of Texas, Louisiana, Alabama, Mississippi, Tennessee, and Kentucky (see Ruppert et al., 2002; Dennen, 2009; and other chapters of this publication). Lignite...
Authors
Paul C. Hackley, Jason C. Willett, Peter D. Warwick, S.J. Law, Douglas J. Nichols
Analytical results from samples collected during coal-bed methane exploration drilling in Caldwell Parish, Louisiana Analytical results from samples collected during coal-bed methane exploration drilling in Caldwell Parish, Louisiana
In 2001, and 2002, the U.S. Geological Survey (USGS) and the Louisiana Geological Survey (LGS), through a Cooperative Research and Development Agreement (CRADA) with Devon SFS Operating, Inc. (Devon), participated in an exploratory drilling and coring program for coal-bed methane in north-central Louisiana. The USGS and LGS collected 25 coal core and cuttings samples from two coal-bed...
Authors
Peter D. Warwick, F. Clayton Breland, Paul C. Hackley, Frank T. Dulong, Douglas J. Nichols, Alexander W. Karlsen, R. Marc Bustin, Charles E. Barker, Jason C. Willett, Michael H. Trippi
The Muralla Pircada: an ancient Andean debris flow retention dam, Santa Rita B archaeological site, Chao Valley, Northern Peru The Muralla Pircada: an ancient Andean debris flow retention dam, Santa Rita B archaeological site, Chao Valley, Northern Peru
Debris flows caused by El Niño events, earthquakes, and glacial releases have affected northern Perú for centuries. The Muralla Pircada, a northeast-trending, 2.5 km long stone wall east of the Santa Rita B archaeological site (Moche-Chimú) in the Chao Valley, is field evidence that ancient Andeans recognized and, more importantly, attempted to mitigate the effects of debris flows. The...
Authors
William E. Brooks, Jason C. Willett, Jonathan D. Kent, Victor Vasquez, Teresa Rosales
Preliminary Results from Coal-Bed Methane Drilling in Ouachita Parish, Louisiana Preliminary Results from Coal-Bed Methane Drilling in Ouachita Parish, Louisiana
No abstract available.
Authors
Peter D. Warwick, F. Clayton Breland, Arthur C. Clark, Jason C. Willett
Mineral, Energy, and Fertilizer Resources of the North Coast of Peru: Perspective from the Santa Rita B Archaeological Site Mineral, Energy, and Fertilizer Resources of the North Coast of Peru: Perspective from the Santa Rita B Archaeological Site
The Santa Rita B archaeological site is in the Chao Valley, approximately 65 km southeast of Trujillo, northern Peru. Location of Santa Rita B at the emergence of several drainages from the Andean cordillera is an important factor in the almost continuous occupation of the site over the past 3,000 years. Mineral resources are abundant throughout the Andes; however, the north coast of...
Authors
William E. Brooks, Jonathan D. Kent, Jason C. Willett
Update: World Coal Quality Inventory -- Peru Update: World Coal Quality Inventory -- Peru
No abstract available.
Authors
William E. Brooks, Jason C. Willett
Update: World Coal Quality Inventory -- Argentina Update: World Coal Quality Inventory -- Argentina
No abstract available.
Authors
William E. Brooks, Jason C. Willett
Coal quality and resources in the U.S. Gulf Coastal Plain Coal quality and resources in the U.S. Gulf Coastal Plain
No abstract available.
Authors
Peter D. Warwick, John R. SanFilipo, Jason C. Willett
Semi-quantitative determination of the modes of occurrence of elements in coal: Results from an international round robin project Semi-quantitative determination of the modes of occurrence of elements in coal: Results from an international round robin project
No abstract available.
Authors
Jason C. Willett, Robert B. Finkelman, Stanley J. Mroczkowski, Curtis A. Palmer, Allan Kolker
Coal geology, resources and coal-bed methane potential for the U.S. Gulf Coastal Plain Coal geology, resources and coal-bed methane potential for the U.S. Gulf Coastal Plain
No abstract available.
Authors
Peter D. Warwick, John R. SanFilipo, Jason C. Willett, Steven M. Podwysocki
Tertiary coals in South Texas: Anomalous cannel-like coals of Webb County (Claiborne Group, Eocene) and lignites of Atascosa County (Jackson Group, Eocene) - Geologic setting, character, source-rock and coal-bed methane potential Tertiary coals in South Texas: Anomalous cannel-like coals of Webb County (Claiborne Group, Eocene) and lignites of Atascosa County (Jackson Group, Eocene) - Geologic setting, character, source-rock and coal-bed methane potential
The coal-bearing Gulf of Mexico Coastal Plain of North America contains a variety of depositional settings and coal types. The coal-bearing region extends westward from Alabama and Mississippi, across Louisiana to the northern part of the Mississippi Embayment, and then southward to eastern Arkansas, Texas and northern Mexico (fig. 1). Most of the coal currently mined in Texas is lignite...
Non-USGS Publications**
Kalkreuth, W., Holz, M., Mexias, A., Balbinot, M., Levandowski, J., Willett, J., Finkelman, R., Burger, H., 2010, Depositional setting, petrology and chemistry of Permian coals from the Paraná Basin: 2. South Santa Catarina Coalfield, Brazil, International Journal of Coal Geology, V. 84, No. 3–4, P. 213-236.
Holdgate, G.R., McLoughlin, S., Drinnan, A.N., Finkelman, R.B., Willett, J.C. and Chiehowsky, L.A., 2005, Inorganic chemistry, petrography and palaeobotany of Permian of coals in the Prince Charles Mountains, East Antarctica, International Journal of Coal Geology, v.63, no. 1-2, p. 156-178.
Tewalt, S.J., Willett, J.C. and Finkelman, R.B., The World Coal Quality Inventory: A status
report, 2005, International Journal of Coal Geology, v.63, no. 1-2, p. 190-195.
report, 2005, International Journal of Coal Geology, v.63, no. 1-2, p. 190-195.
**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
Historical statistics
Historical statistics
2025 Critical Minerals List
2025 Critical Minerals List
Filter Total Items: 28
Mineral resource of the month: aggregates Mineral resource of the month: aggregates
Crushed stone and construction sand and gravel, the two major types of natural aggregates, are among the most abundant and accessible natural resources on the planet. The earliest civilizations used aggregates for various purposes, mainly construction. Today aggregates provide the basic raw materials for the foundation of modern society.
Authors
Jason C. Willett
A review of the lignite resources of Arkansas A review of the lignite resources of Arkansas
This review of the lignite resources of Arkansas is a part of the U.S. Geological Survey's (USGS) National Coal Resource Assessment (NCRA) of the Gulf Coastal Plain Coal Province, which also includes coal-bearing areas in the states of Texas, Louisiana, Alabama, Mississippi, Tennessee, and Kentucky (see Ruppert et al., 2002; Dennen, 2009; and other chapters of this publication). Lignite...
Authors
Paul C. Hackley, Jason C. Willett, Peter D. Warwick, S.J. Law, Douglas J. Nichols
Analytical results from samples collected during coal-bed methane exploration drilling in Caldwell Parish, Louisiana Analytical results from samples collected during coal-bed methane exploration drilling in Caldwell Parish, Louisiana
In 2001, and 2002, the U.S. Geological Survey (USGS) and the Louisiana Geological Survey (LGS), through a Cooperative Research and Development Agreement (CRADA) with Devon SFS Operating, Inc. (Devon), participated in an exploratory drilling and coring program for coal-bed methane in north-central Louisiana. The USGS and LGS collected 25 coal core and cuttings samples from two coal-bed...
Authors
Peter D. Warwick, F. Clayton Breland, Paul C. Hackley, Frank T. Dulong, Douglas J. Nichols, Alexander W. Karlsen, R. Marc Bustin, Charles E. Barker, Jason C. Willett, Michael H. Trippi
The Muralla Pircada: an ancient Andean debris flow retention dam, Santa Rita B archaeological site, Chao Valley, Northern Peru The Muralla Pircada: an ancient Andean debris flow retention dam, Santa Rita B archaeological site, Chao Valley, Northern Peru
Debris flows caused by El Niño events, earthquakes, and glacial releases have affected northern Perú for centuries. The Muralla Pircada, a northeast-trending, 2.5 km long stone wall east of the Santa Rita B archaeological site (Moche-Chimú) in the Chao Valley, is field evidence that ancient Andeans recognized and, more importantly, attempted to mitigate the effects of debris flows. The...
Authors
William E. Brooks, Jason C. Willett, Jonathan D. Kent, Victor Vasquez, Teresa Rosales
Preliminary Results from Coal-Bed Methane Drilling in Ouachita Parish, Louisiana Preliminary Results from Coal-Bed Methane Drilling in Ouachita Parish, Louisiana
No abstract available.
Authors
Peter D. Warwick, F. Clayton Breland, Arthur C. Clark, Jason C. Willett
Mineral, Energy, and Fertilizer Resources of the North Coast of Peru: Perspective from the Santa Rita B Archaeological Site Mineral, Energy, and Fertilizer Resources of the North Coast of Peru: Perspective from the Santa Rita B Archaeological Site
The Santa Rita B archaeological site is in the Chao Valley, approximately 65 km southeast of Trujillo, northern Peru. Location of Santa Rita B at the emergence of several drainages from the Andean cordillera is an important factor in the almost continuous occupation of the site over the past 3,000 years. Mineral resources are abundant throughout the Andes; however, the north coast of...
Authors
William E. Brooks, Jonathan D. Kent, Jason C. Willett
Update: World Coal Quality Inventory -- Peru Update: World Coal Quality Inventory -- Peru
No abstract available.
Authors
William E. Brooks, Jason C. Willett
Update: World Coal Quality Inventory -- Argentina Update: World Coal Quality Inventory -- Argentina
No abstract available.
Authors
William E. Brooks, Jason C. Willett
Coal quality and resources in the U.S. Gulf Coastal Plain Coal quality and resources in the U.S. Gulf Coastal Plain
No abstract available.
Authors
Peter D. Warwick, John R. SanFilipo, Jason C. Willett
Semi-quantitative determination of the modes of occurrence of elements in coal: Results from an international round robin project Semi-quantitative determination of the modes of occurrence of elements in coal: Results from an international round robin project
No abstract available.
Authors
Jason C. Willett, Robert B. Finkelman, Stanley J. Mroczkowski, Curtis A. Palmer, Allan Kolker
Coal geology, resources and coal-bed methane potential for the U.S. Gulf Coastal Plain Coal geology, resources and coal-bed methane potential for the U.S. Gulf Coastal Plain
No abstract available.
Authors
Peter D. Warwick, John R. SanFilipo, Jason C. Willett, Steven M. Podwysocki
Tertiary coals in South Texas: Anomalous cannel-like coals of Webb County (Claiborne Group, Eocene) and lignites of Atascosa County (Jackson Group, Eocene) - Geologic setting, character, source-rock and coal-bed methane potential Tertiary coals in South Texas: Anomalous cannel-like coals of Webb County (Claiborne Group, Eocene) and lignites of Atascosa County (Jackson Group, Eocene) - Geologic setting, character, source-rock and coal-bed methane potential
The coal-bearing Gulf of Mexico Coastal Plain of North America contains a variety of depositional settings and coal types. The coal-bearing region extends westward from Alabama and Mississippi, across Louisiana to the northern part of the Mississippi Embayment, and then southward to eastern Arkansas, Texas and northern Mexico (fig. 1). Most of the coal currently mined in Texas is lignite...
Non-USGS Publications**
Kalkreuth, W., Holz, M., Mexias, A., Balbinot, M., Levandowski, J., Willett, J., Finkelman, R., Burger, H., 2010, Depositional setting, petrology and chemistry of Permian coals from the Paraná Basin: 2. South Santa Catarina Coalfield, Brazil, International Journal of Coal Geology, V. 84, No. 3–4, P. 213-236.
Holdgate, G.R., McLoughlin, S., Drinnan, A.N., Finkelman, R.B., Willett, J.C. and Chiehowsky, L.A., 2005, Inorganic chemistry, petrography and palaeobotany of Permian of coals in the Prince Charles Mountains, East Antarctica, International Journal of Coal Geology, v.63, no. 1-2, p. 156-178.
Tewalt, S.J., Willett, J.C. and Finkelman, R.B., The World Coal Quality Inventory: A status
report, 2005, International Journal of Coal Geology, v.63, no. 1-2, p. 190-195.
report, 2005, International Journal of Coal Geology, v.63, no. 1-2, p. 190-195.
**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.