JoAnn M. Holloway
JoAnn Holloway is a Research Physical Scientist (biogeochemistry) with the Geology, Geophysics, and Geochemistry Science Center.
JoAnn M. Holloway is a biogeochemist with research interests exploring the influence of parent material, geomorphology and hydrologic processes on soil biogeochemistry. These processes are evaluated in the context of how land use, including mining, urbanization, forestry, and agricultural practices can influence soil and water quality. Her background in hydrology, geology, geochemistry, pedology, and soil microbiology provides the basis for interdisciplinary collaborations to evaluate the impact of land use on soil and water quality. Her recent work has focused on how wildfire overprinting historically mined watersheds affect the remobilization of mercury and other trace metals and the implications for ongoing mining remediation operations. She has also worked with hydrothermal processes influencing the speciation of nitrogen and mercury in Yellowstone thermal waters.
Professional Experience
Research Physical Scientist, 2011 - present
U.S. Geological Survey, Geology, Geophysics, and Geochemistry Science Center; Denver, COResearch Geologist, 2005 - 2011
U.S. Geological Survey, Crustal Imaging and Characterization Science Center; Denver, COResearch Geologist (Mendenhall Postdoctoral Fellow), 2003-2005
U.S. Geological Survey, Crustal Imaging and Characterization Team; Denver, COLecturer, Spring Semester 2003
"Environmental Microbiology", Department of Civil, Environmental and Architectural Engineering, University of Colorado, Boulder, COResearch Hydrologist (National Research Council Postdoctoral Fellow) 1999-2001
U.S. Geological Survey, National Research Program; Boulder, CO
Education and Certifications
Ph.D. Hydrologic Sciences, University of California at Davis, 1999
Dissertation: Influence of Bedrock Weathering on Nitrogen Cycling in a Sierra Nevada Watershed
Advisor: Randy DahlgrenM.S. Geology, Western Washington University, 1993
Thesis: Geochemical Interactions in a Subalpine Watershed, Mount Baker National Recreation Area, WashingtonB.S. Geology, University of Utah, 1990
Senior Thesis: Mineralization and Geochemistry of the Escalante Silver Mine, Iron County, Utah
Science and Products
Nitrogen and carbon flow from rock to water: Regulation through soil biogeochemical processes, Mokelumne River watershed, California, and Grand Valley, Colorado Nitrogen and carbon flow from rock to water: Regulation through soil biogeochemical processes, Mokelumne River watershed, California, and Grand Valley, Colorado
Nitrogen transformations in hot spring runoff, Yellowstone National Park, WY Nitrogen transformations in hot spring runoff, Yellowstone National Park, WY
Nitrogen in rock: Occurrences and biogeochemical implications Nitrogen in rock: Occurrences and biogeochemical implications
Water-chemistry data for selected springs, geysers, and streams in Yellowstone National Park, Wyoming, 1999-2000 Water-chemistry data for selected springs, geysers, and streams in Yellowstone National Park, Wyoming, 1999-2000
Seasonal and event-scale variations in solute chemistry for four Sierra Nevada catchments Seasonal and event-scale variations in solute chemistry for four Sierra Nevada catchments
Nitrogen release from rock and soil under simulated field conditions Nitrogen release from rock and soil under simulated field conditions
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
Nitrogen and carbon flow from rock to water: Regulation through soil biogeochemical processes, Mokelumne River watershed, California, and Grand Valley, Colorado Nitrogen and carbon flow from rock to water: Regulation through soil biogeochemical processes, Mokelumne River watershed, California, and Grand Valley, Colorado
Nitrogen transformations in hot spring runoff, Yellowstone National Park, WY Nitrogen transformations in hot spring runoff, Yellowstone National Park, WY
Nitrogen in rock: Occurrences and biogeochemical implications Nitrogen in rock: Occurrences and biogeochemical implications
Water-chemistry data for selected springs, geysers, and streams in Yellowstone National Park, Wyoming, 1999-2000 Water-chemistry data for selected springs, geysers, and streams in Yellowstone National Park, Wyoming, 1999-2000
Seasonal and event-scale variations in solute chemistry for four Sierra Nevada catchments Seasonal and event-scale variations in solute chemistry for four Sierra Nevada catchments
Nitrogen release from rock and soil under simulated field conditions Nitrogen release from rock and soil under simulated field conditions
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.