Jim Budahn
Jim Budahn is a Scientist Emeritus with the Geosciences and Environmental Change Science Center
Science and Products
Filter Total Items: 61
Soil genesis on the island of Bermuda in the Quaternary: the importance of African dust transport and deposition Soil genesis on the island of Bermuda in the Quaternary: the importance of African dust transport and deposition
The origin of terra rossa, red or reddish-brown, clay-rich soils overlying high-purity carbonate substrates, has intrigued geologists and pedologists for decades. Terra rossa soils can form from accumulation of insoluble residues during dissolution of the host limestones, addition of volcanic ash, or addition of externally derived, long-range-transported (LRT) aeolian particles. We...
Authors
Daniel R. Muhs, James R. Budahn, Joseph M. Prospero, Gary Skipp, Stanley R. Herwitz
Accumulation of impact markers in desert wetlands and implications for the Younger Dryas impact hypothesis Accumulation of impact markers in desert wetlands and implications for the Younger Dryas impact hypothesis
The Younger Dryas impact hypothesis contends that an extraterrestrial object exploded over North America at 12.9 ka, initiating the Younger Dryas cold event, the extinction of many North American megafauna, and the demise of the Clovis archeological culture. Although the exact nature and location of the proposed impact or explosion remain unclear, alleged evidence for the fallout comes...
Authors
Jeffrey S. Pigati, Claudio Latorre, Jason A. Rech, Julio L. Betancourt, Katherine E. Martinez, James R. Budahn
Radionuclides, trace elements, and radium residence in phosphogypsum of Jordan Radionuclides, trace elements, and radium residence in phosphogypsum of Jordan
Voluminous stockpiles of phosphogypsum (PG) generated during the wet process production of phosphoric acid are stored at many sites around the world and pose problems for their safe storage, disposal, or utilization. A major concern is the elevated concentration of long-lived 226Ra (half-life = 1,600 years) inherited from the processed phosphate rock. Knowledge of the abundance and mode...
Authors
R. A. Zielinski, M. S. Al-Hwaiti, J. R. Budahn, J. F. Ranville
Chemistry of selected core samples, concentrate, tailings, and tailings pond waters: Pea Ridge iron (-lanthanide-gold) deposit, Washington County, Missouri Chemistry of selected core samples, concentrate, tailings, and tailings pond waters: Pea Ridge iron (-lanthanide-gold) deposit, Washington County, Missouri
The Minerals at Risk and for Emerging Technologies Project of the U.S. Geological Survey (USGS) Mineral Resources Program is examining potential sources of lanthanide elements (rare earth elements) as part of its objective to provide up-to-date geologic information regarding mineral commodities likely to have increased demand in the near term. As part of the examination effort, a short...
Authors
Richard I. Grauch, Philip L. Verplanck, Cheryl M. Seeger, James R. Budahn, Bradley S. Van Gosen
Geochemical and mineralogical evidence for Sahara and Sahel dust additions to Quaternary soils on Lanzarote, eastern Canary Islands, Spain Geochemical and mineralogical evidence for Sahara and Sahel dust additions to Quaternary soils on Lanzarote, eastern Canary Islands, Spain
Africa is the most important source of dust in the world today, and dust storms are frequent on the nearby Canary Islands. Previous workers have inferred that the Sahara is the most important source of dust to Canary Islands soils, with little contribution from the Sahel region. Soils overlying a late Quaternary basalt flow on Lanzarote, Canary Islands, contain, in addition to volcanic...
Authors
D.R. Muhs, J. Budahn, G. Skipp, J.M. Prospero, D. Patterson, E. Arthur Bettis
The role of African dust in the formation of Quaternary soils on Mallorca, Spain and implications for the genesis of Red Mediterranean soils The role of African dust in the formation of Quaternary soils on Mallorca, Spain and implications for the genesis of Red Mediterranean soils
African dust additions explain the origin of terra rossa soils that are common on the carbonate-platform island of Mallorca, Spain. Mineralogical and geochemical analyses indicate that Quaternary carbonate eolianites on Mallorca have a very high purity, usually composed of more than 90% carbonate minerals (calcite, dolomite, and aragonite). In contrast, terra rossa soils developed on...
Authors
D.R. Muhs, J. Budahn, A. Avila, G. Skipp, J. Freeman, D. Patterson
Science and Products
Filter Total Items: 61
Soil genesis on the island of Bermuda in the Quaternary: the importance of African dust transport and deposition Soil genesis on the island of Bermuda in the Quaternary: the importance of African dust transport and deposition
The origin of terra rossa, red or reddish-brown, clay-rich soils overlying high-purity carbonate substrates, has intrigued geologists and pedologists for decades. Terra rossa soils can form from accumulation of insoluble residues during dissolution of the host limestones, addition of volcanic ash, or addition of externally derived, long-range-transported (LRT) aeolian particles. We...
Authors
Daniel R. Muhs, James R. Budahn, Joseph M. Prospero, Gary Skipp, Stanley R. Herwitz
Accumulation of impact markers in desert wetlands and implications for the Younger Dryas impact hypothesis Accumulation of impact markers in desert wetlands and implications for the Younger Dryas impact hypothesis
The Younger Dryas impact hypothesis contends that an extraterrestrial object exploded over North America at 12.9 ka, initiating the Younger Dryas cold event, the extinction of many North American megafauna, and the demise of the Clovis archeological culture. Although the exact nature and location of the proposed impact or explosion remain unclear, alleged evidence for the fallout comes...
Authors
Jeffrey S. Pigati, Claudio Latorre, Jason A. Rech, Julio L. Betancourt, Katherine E. Martinez, James R. Budahn
Radionuclides, trace elements, and radium residence in phosphogypsum of Jordan Radionuclides, trace elements, and radium residence in phosphogypsum of Jordan
Voluminous stockpiles of phosphogypsum (PG) generated during the wet process production of phosphoric acid are stored at many sites around the world and pose problems for their safe storage, disposal, or utilization. A major concern is the elevated concentration of long-lived 226Ra (half-life = 1,600 years) inherited from the processed phosphate rock. Knowledge of the abundance and mode...
Authors
R. A. Zielinski, M. S. Al-Hwaiti, J. R. Budahn, J. F. Ranville
Chemistry of selected core samples, concentrate, tailings, and tailings pond waters: Pea Ridge iron (-lanthanide-gold) deposit, Washington County, Missouri Chemistry of selected core samples, concentrate, tailings, and tailings pond waters: Pea Ridge iron (-lanthanide-gold) deposit, Washington County, Missouri
The Minerals at Risk and for Emerging Technologies Project of the U.S. Geological Survey (USGS) Mineral Resources Program is examining potential sources of lanthanide elements (rare earth elements) as part of its objective to provide up-to-date geologic information regarding mineral commodities likely to have increased demand in the near term. As part of the examination effort, a short...
Authors
Richard I. Grauch, Philip L. Verplanck, Cheryl M. Seeger, James R. Budahn, Bradley S. Van Gosen
Geochemical and mineralogical evidence for Sahara and Sahel dust additions to Quaternary soils on Lanzarote, eastern Canary Islands, Spain Geochemical and mineralogical evidence for Sahara and Sahel dust additions to Quaternary soils on Lanzarote, eastern Canary Islands, Spain
Africa is the most important source of dust in the world today, and dust storms are frequent on the nearby Canary Islands. Previous workers have inferred that the Sahara is the most important source of dust to Canary Islands soils, with little contribution from the Sahel region. Soils overlying a late Quaternary basalt flow on Lanzarote, Canary Islands, contain, in addition to volcanic...
Authors
D.R. Muhs, J. Budahn, G. Skipp, J.M. Prospero, D. Patterson, E. Arthur Bettis
The role of African dust in the formation of Quaternary soils on Mallorca, Spain and implications for the genesis of Red Mediterranean soils The role of African dust in the formation of Quaternary soils on Mallorca, Spain and implications for the genesis of Red Mediterranean soils
African dust additions explain the origin of terra rossa soils that are common on the carbonate-platform island of Mallorca, Spain. Mineralogical and geochemical analyses indicate that Quaternary carbonate eolianites on Mallorca have a very high purity, usually composed of more than 90% carbonate minerals (calcite, dolomite, and aragonite). In contrast, terra rossa soils developed on...
Authors
D.R. Muhs, J. Budahn, A. Avila, G. Skipp, J. Freeman, D. Patterson