Education:
A.B., Geology and Geophysics, Princeton University, 1968
M.S., Geology, University of Colorado, 1970
Ph.D., Geology, University of Colorado, 1975
Membership in Professional Societies:
Professional Experience:
| 1968-1971 (intermittent): | Geologist, USGS; Yellowstone and Antarctica |
| 1975-present: | Research Geologist, USGS (with periodic supervisory positions) |
| 2002: | Acting Program Coordinator, Earth Surface Dynamics Program, USGS |
Current Research:
Interactions between geologic and ecologic processes bearing on dryland ecosystem structure and function-past, present, and future. Geologic, biologic, and human controls on dust generation. Roles of atmospheric dust in dryland ecosystem dynamics. Paleoclimates and evolution of landscapes in response to climatic change. Iron-sulfur diagenesis and its effects on magnetic properties of sediments. Environmental magnetism. Chemical and magnetic records of pollution in sediments and mineral dust.
Project Chief, Effects of Climatic Variability and Land Use on American Drylands
Selected Publications Since 1990:
Neff, J.C., Ballantyne, A.P., Famer, G.L., Mahowald, N.M., Conroy, J.L., Landry, C.C., Overpeck, J.T., Painter, T.H., Lawrence, C.R., and Reynolds R.L., 2008, Increasing eolian dust deposition in the western United States linked to human activity. Nature - Geosciences. doi:10.1038/ngeo133
Fernandez, D.P., J.C. Neff, R.L. Reynolds, 2007, Biogeochemical and ecological impacts of livestock grazing in semi-arid Southeastern Utah, USA. Journal of Arid Environments. doi:10.1016/j.jaridenv.2007.10.009.
Goldstein, H. L., R. L. Reynolds, M. C. Reheis, J. C. Yount, and J. C. Neff, 2008, Compositional trends in aeolian dust along a transect across the southwestern United States, Journal of Geophysical Research, 113, F02S02, doi:10.1029/2007JF000751.
Rosenbaum, J.G., Dean, W.E., Reynolds, R.L., and Reheis, M.C., Allogenic sedimentary components of Bear Lake, Utah and Idaho, in Paleoenvironments of Bear Lake, Utah and Idaho, Geological Society of America Special Paper, in press.
Heil, C.W., King, J.W., Rosenbaum, J.G., Reynolds, R.L., and Colman, S. M., Paleomagnetism and environmental magnetism of Bear Lake, Idaho-Utah for GLAD800 sediment cores: for Geological Society of America Special Paper, in Paleoenvironments of Bear Lake, Utah and Idaho, Geological Society of America Special Paper, in press.
Reheis, M.C., Budhan, J.R., Lamothe, P.L., and Reynolds, R.L., Compositions of modern dust and surface sediments in the desert southwest, USA: Journal of Arid Environments, submitted.
Draut, A.E., Bothner, M.H., Reynolds, R.L., Field, M.E., Cochran, S.A., and Logan, J.B., Supply and Dispersal of Seasonal Flood Deposits in Hanalei Bay, Kaua'i, HI, USA: Implications for Land Use Near Coral-Reef Ecosystems: Geological Society of America Bulletin, in press.
Reynolds, R.L., Yount, J.C., Reheis, M.C., Goldstein, H., Chavez, Jr., P., Fulton, R., Whitney J., Fuller, C., Forester, R.M., 2007, Dust emission from wet and dry playas in the Mojave Desert (USA). Earth Surface Processes and Landforms; v. 32, 1811-1827. DOI: 10.1002/esp.1515.
Reynolds, R.L., Reheis, M.C., Neff, J.C., Goldstein, H., and Yount, J.C., 2006, Late Quaternary eolian dust in surficial deposits of a Colorado Plateau grassland: Controls on distribution and ecologic effects: Catena, 66, 251-266.
Neff, J.C., Reynolds, R.L., Sanford, R.L., Fernandez. D.P., and Lamothe, P., 2006, Geologic controls over soil and plant chemistry in southeastern Utah: Ecosystems, 9(6), DOI10.1007/s10021-005-0092-8.
Bothner, M.H., Reynolds, R.L., Casso, M.A., Storlazzi, C.D., and Field, M.E., 2006, Quantity, composition, and source of sediment collected in sediment traps along the fringing coral reef of Molokai, Hawaii: Marine Pollution Bulletin, v. 52(9), p. 1034-1047.
Miller, M.E., Belnap, J., Beatty, S.W., and Reynolds, R.L., 2006, Performance of Bromus tectorum L. in relation to soil properties, water additions, and chemical amendments in calcareous soils of southeastern Utah, U.S.A., Plant and Soil, DOI 10.1007/s11104-006-0058-4.
Reynolds, R.L., Reheis, M.C., Yount, J., and Lamothe, P., 2006, Composition of aeolian dust in natural traps on isolated surfaces of the central Mojave Desert-Insights to mixing, sources, and nutrient inputs: Journal of Arid Environments, v. 66, p. 42-61.
Fernandez. D.P., Neff, J.C., Belnap, J., and Reynolds, R.L., 2006, Decomposition in an arid environment on the Colorado Plateau (USA): Abiotic regulators and thresholds: Biogeochemistry DOI:10.1007/s10533-005-4278-0 v. 78, Number 3, p. 247-265.
Reynolds, R.L., Neff, J.C., Reheis, M.C., and Lamothe, P., 2006, Atmospheric dust in modern soil on aeolian sandstone, Colorado Plateau (USA): Variation with landscape position and contribution to potential plant nutrients: Geoderma, v. 130, p. 108-123.
Reynolds, R.L. and Rosenbaum, J.G., 2005, Magnetic mineralogy of sediments in Bear Lake and its watershed, Utah, Idaho, and Wyoming: Support for paleoenvironmental and paleomagnetic interpretations: U.S. Geological Survey Open-file Report 2005-1406, 17 p. (also available at: http://pubs.usgs.gov/of/2005/1406/).
Kohfeld, K., Reynolds. R.L., Pelletier, J., and Nickling, W., 2005, Linking the scales of process, observation, and modeling of dust emissions: EOS, Transactions of the American Geophysical Union: v. 8, no. 11, 15 March 2005, p. 113-114.
Neff, J., Reynolds, R.L., Belnap, J., and Lamothe, P., 2005, Multi-decadal impacts of grazing on soil physical and biogeochemical properties in Southeast Utah: Ecological Applications, 15(1), 87-95.
Reheis, M.C., Reynolds, R.L., Goldstein, H., Roberts, H.M., Yount, J.C., Axford, Y., Cummings, L.S., and Shearin, N., 2005, Late Quaternary geomorphic history in upland regions of Canyonlands, Utah: Dunes, dust, soils, arroyos, and paleoclimate: Geological Society of America Bulletin, v. 117, issue 7, p. 1051-1069.
Goldhaber. M.B., Callender, E., and Reynolds, R.L., 2004, The geochemical and magnetic record of coal-combustion products in West Virginia reservoir sediments and soils: in R.J. Hill, J. Leventhal, Z. Aizenshtat, M.J. Baedecker, G. Claypool, R. Eganhouse, M. Goldhaber, and K. Peters (eds.) Geochemical Investigations in Earth and Space Science, The Geochemical Society, Publication No. 9, p. 159-186.
MacKinnon, D., Clow, G., Tigges, R., Reynolds, R.L., and Chavez, P.S., Jr., 2004, Comparison of aerodynamically and model-derived roughness lengths (Z0) over diverse surfaces, central Mojave Desert, California, USA: Geomorphology, v. 63, p. 103-113.
Bradbury, J.P., Colman, S.C., and Reynolds, R.L., 2004, The history of recent limnologic changes and human impact on Upper Klamath Lake, Oregon: Journal of Paleolimnology, p. 151-165.
Rosenbaum, J.G., and Reynolds, R.L., 2004, Basis for paleoenvironmental interpretation of magnetic properties of sediment from Upper Klamath Lake (Oregon): Effects of weathering and mineralogic sorting: Journal of Paleolimnology, p. 253-265.
Rosenbaum, J.G., and Reynolds, R.L., 2004, Record of Late Pleistocene glaciation and deglaciation in the southern Cascade Range: II. Flux of glacial flour in a sediment core from Upper Klamath Lake, Oregon: Journal of Paleolimnology, in press, p. 235-252.
Reynolds, R.L., Rosenbaum, J.G., Rapp, J., Kerwin, M.W., Bradbury, J.P., Colman, S.C., and Adam, D., 2004, Record of Late Pleistocene glaciation and deglaciation in the southern Cascade Range: I. Petrologic evidence from lacustrine sediment in Upper Klamath Lake, southern Oregon: Journal of Paleolimnology, p. 217-233.
Reynolds, R.L., and others, 2003, Dust emission and deposition in the southwestern U.S.-Integrated field, remote sensing, and modeling studies to evaluate response to climatic variability and land use: in Al Sharhan, A.R., Wood, W.W., Goudie, A.S., Fowler, A., and Abdellatif, E., (eds.) Desertification in the Third Millennium: A.A. Balkema/Swets & Zeitlinger, Rotterdam, The Netherlands p. 271-282.
Belnap, Jayne, Phillips, S., Duniway, M., and Reynolds, R.L., 2003, Soil fertility in deserts: A review on the influence of biological soil crust and the effect of soil surface disturbance on nutrient inputs and losses: in Al Sharhan, A.R., Wood, W.W., Goudie, A.S., Fowler, A., and Abdellatif, E., (eds.) Desertification in the Third Millennium: Swets & Zeitlinger, Lisse, The Netherlands, p. 245-252.
Chavez, P.S., Jr., MacKinnon, D.J., Reynolds, R.L., and Velasco, M., 2002, Monitoring dust storms and mapping landscape vulnerability to wind erosion using satellite and ground-based digital images: Arid Lands Newsletter, No, 51, web publication: http://ag.arizona.edu/OALS/ALN/aln51/chavez.html.
Muhs, D.R., Reynolds, R.L., Been, J., and Skipp, G., 2003, Eolian sand transport pathways in the southwestern United States: Importance of the Colorado River: Quaternary International, v. 104, p. 3-18.
Reheis, M.C., Sarna-Wojcicki, A.M., Reynolds, R.L., Repenning, C.A., and Mifflin, M.D., 2002, Pliocene to middle Pleistocene lakes in the western Great Basin: Ages and connections, in Hershler, R., Currey, D., and Madsen, D., eds., Great Basin Aquatic Systems History: Smithsonian Contributions Series, Smithsonian Institution, p. 53-108.
Reynolds, R.L., Belnap, J., Reheis, M., Lamothe, P., Luiszer, F., 2001, Eolian dust in Colorado Plateau soils: Nutrient inputs and recent change in source: Proceedings of the National Academy of Sciences, v. 98, p. 7123-7127.
Reynolds, R.L., Sweetkind, D.S., and Axford, Yarrow, 2001, An inexpensive magnetic mineral separator for fine-grained sediment: U.S. Geological Survey open-file report 01-281, 7 p. (also available at: http://pubs.usgs.gov/of/2001/ofr-01-0281/).
Rosenbaum, J.G., Reynolds, R.L., Smoot, J., and Meyer, R., 2000, Anisotropy of magnetic susceptibility as a tool for recognizing core deformation: Reevaluation of the paleomagnetic record of Pleistocene sediments from drill hole OL-92, Owens Lake, California: Earth and Planetary Science Letters, v. 178, p. 415-424.
Reynolds, R.L., Rosenbaum, J.G., Sweetkind, D.S., Lanphere, M.A., Roberts, A.P., and Verosub, K.L., 2000, Recognition of primary and diagenetic magnetizations to determine the magnetic polarity record and timing of deposition of the moat-fill rocks of the Oligocene Creede Formation, in Bethke, P.M., and Hay, R.L., eds., Ancient Lake Creede: Its volcano-tectonic setting, history of sedimentation, and relation to mineralization in the Creede Mining District: Boulder, Colorado, Geological Society of America Special Paper 346, p. 77-93.
Colman, S.M., King, J.W., Jones, G.A., Reynolds, R.L., and Bothner, M.H., 2000, Holocene and recent sediment accumulation rates in southern Lake Michigan: Quaternary Science Reviews, v. 19, p. 1563-1580.
Reynolds, R.L., Rosenbaum, J.G., van Metre, P., Tuttle, M., Callender, E., and Goldin, A., 1999, Greigite (Fe3S4) as an indicator of drought - The 1912-1994 sediment magnetic record from White Rock Lake, Dallas, Texas, USA: Journal of Paleolimnology, v. 21, p. 193-206.
Cathcart, J.D., Reynolds, R.L., Brownfield, M., and Hower, J., 1997, Chemical, mineralogical, and magnetic characterization of sized fly ash from a coal-fired power plant in Kentucky: Proceedings of the 1997 International Ash Utilization Symposium, Lexington, Kentucky, p. 785-792.
Reynolds, R.L., Dettinger, M., Cayan, D., Stephens, D., and Highland, L., 1997, Effects of El Niño on streamflow, lake level, and landslide potential: http://geochange.er.usgs.gov/sw/changes/natural/elnino/
Reynolds, R.L., Goldhaber, M.B., and Snee, L., 1997, Paleomagnetic and 40Ar/39Ar results from the Grant intrusive breccia and comparison to the Permian Downeys Bluff sill-Evidence for Permian igneous activity at Hicks dome, southern Illinois basin: U.S. Geological Survey Bulletin 2094-G, 16 p.
Rosenbaum, J.G., Reynolds, R.L., Adam, D.P., Drexler, J., Sarna-Wojcicki, A.M., and Whitney, G.C., 1996, A middle Pleistocene climate record from Buck Lake, southern Oregon--evidence from sediment magnetism, trace-element geochemistry, and pollen: Geological Society of America Bulletin, v. 108, p. 1328-1341.
Roberts, A., Reynolds, R.L., Adam, D., and Verosub, K.L., 1996, Environmental magnetic implications of greigite (Fe3S4) formation in a 3 m.y. lake sediment record from Butte Valley, northern California: Geophysical Research Letters, v. 23, p. 2859-2862.
Reynolds, R.L., and King, J.W., 1995, Magnetic records of climate change: Reviews of Geophysics, U.S. National Report to International Union of Geodesy and Geophysics 1991-1994, p. 101-110.
Reynolds, R.L., Tuttle, M.L., Rice, C., Fishman, N.S., Karachewski, J.A., and Sherman, D., 1994, Magnetization and geochemistry of greigite-bearing Cretaceous strata, North Slope basin, Alaska: American Journal of Science, v. 294, p. 485-528.
Banerjee, S. and Reynolds, R.L., 1993, Role of chemical change in the paleomagnetic record: EOS Transactions American Geophysical Union, v. 73, p. 519-520.
Reynolds, R.L., Goldhaber, M.B., and Tuttle, M.L., 1993, Sulfidization and magnetization above hydrocarbon reservoirs, in Aissaoui, D.M., McNeill, D.F., and Hurley, N.F., Applications of paleomagnetism to sedimentary geology: SEPM Special Publication No. 49, p. 167-179.
Sweetkind, D.S., Reynolds, R.L., Sawyer, D.A., and Rosenbaum, J.G., 1992, Effects of hydrothermal alteration on magnetization of the Oligocene Carpenter Ridge Tuff, Bachelor caldera, San Juan Mountains, Colorado: Journal of Geophysical Research, v. 98, p. 6255-6266.
Goldhaber, M.B., and Reynolds, R.L., 1991, Relations among hydrocarbon reservoirs, epigenetic sulfidization, and rock magnetization--examples from the South Texas coastal plain: Geophysics, v. 56, p. 748 757.
Phillips, J.D., Reynolds, R.L., and Frey, Herbert, 1991, Crustal structure from surface and satellite magnetic anomalies: Reviews of Geophysics, Supplement; U.S. National Report to International Union of Geodesy and Geophysics, 1987-1990, p. 416-442.
Reynolds, R.L., Fishman, N.S., and Hudson, M.R., 1991, Sources of aeromagnetic anomalies over Cement oil field (Oklahoma), Simpson oil field (Alaska), and the Wyoming-Idaho-Utah thrust belt: Geophysics, v. 56, p. 606-617.
Reynolds, R.L., Rosenbaum, J.G., Hudson, M.R., and Fishman, N.S., 1990, Rock magnetism, the distribution of magnetic minerals in the Earth's crust, and aeromagnetic anomalies, in Hanna, W.F., ed., Geologic Applications of Modern Aeromagnetic Surveys: U.S. Geological Survey Bulletin 1924, p. 24-45.
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