JoAnn Holloway is a Research Physical Scientist (biogeochemistry) with the Geology, Geophysics, and Geochemistry Science Center.
Soil is the basis for terrestrial ecosystems, influencing vegetation patterns and water quality. JoAnn 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 historic 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 interdiscipline collaborations to evaluate the impact of land use and natural disasters (e.g., hurricane surge, wildfires) on soil and water quality.
Research Geologist, 2005 - present
U.S. Geological Survey, Geology, Geophysics, and Geochemistry Science Center; Denver, CO
Research Geologist (Mendenhall Postdoctoral Fellow) 2003-2005
U.S. Geological Survey, Crustal Imaging and Characterization Team; Denver, CO
Lecturer, Spring Semester 2003
"Environmental Microbiology", Department of Civil, Environmental and Architectural Engineering, University of Colorado, Boulder, CO
Research 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 Dahlgren
M.S. Geology, Western Washington University, 1993
Thesis: Geochemical Interactions in a Subalpine Watershed, Mount Baker National Recreation Area, Washington
B.S. Geology, University of Utah, 1990
Senior Thesis: Mineralization and Geochemistry of the Escalante Silver Mine, Iron County, Utah
Science and Products
Science and Products
Pre-USGS PublicationsHolloway, J. M., Dahlgren, R. A., Hansen, B. & Casey, W. H., 1998, Contribution of bedrock nitrogen to high nitrate concentrations in stream water: Nature 395, 785-788, https://doi.org/10.1038/27410.Holloway, J. M. & Dahlgren, R. A., 1999, Geologic nitrogen in biogeochemical cycling: Geology 27, 567-570, https://doi.org/10.1130/0091-7613(1999)027%3C0567:GNITBC%3E2.3.CO;2.Holloway, J.M. & Petersen, E.U., 1991 Mineralization and geochemistry of the Escalante silver mine, Iron County, Utah: (ed., Allison, M. Lee et al.) Utah Geological Association Publication 18, p 83-95.