R. Randall Schumann


B.A., Geography, University of Colorado, 1979
M.S., Geology, Colorado State University, 1985

About Me:
I began my career at the USGS in 1980 with research focusing on fluvial geomorphology and sedimentology of anastomosing river channels; wetland hydrology; surficial uranium deposits; and the geology and geochemistry of radon in rocks and soils.  I received the Department of Interior's Superior Service Award for my work on radon. I was a member of the Central Publications Group from 1995-1997 and was coordinator of computer support, GIS, and web services for the Earth Surface Processes Team from 1997-2000.  I served as Team Chief Scientist (Center Director) of the Earth Surface Processes Team from 2002-2008 and was director of the National Ice Core Laboratory from 2007-2008. I am currently a geologist in the Geosciences and Environmental Change Science Center in Denver, Colorado, conducting studies on the effects of climate change on landscape dynamics in coastal and fluvial environments.


Selected Publications:

Schumann, R.R., Pigati, J.S., 2018, Late Quaternary fluvial history of Santa Cruz Island, California, USA. Western North American Naturalist, v. 78 no .4. https://scholarsarchive.byu.edu/wnan/vol78/iss4/3. Volume in preparation.

Muhs, D.R., Pigati, J.S., Schumann, R.R., Skipp, G.L., Porat, N., DeVogel, S.B., 2018, Quaternary sea-level history and the origin of the northernmost coastal aeolianites in the Americas: Channel Islands National Park, California, USA. Palaeogeography, Palaeoclimatology, Palaeoecology 491:38-76.

Schumann, R.R., Pigati, J.S., 2018, Reply to the discussion of Pinter et al. on 'Fluvial system response to late Pleistocene-Holocene sea-level change on Santa Rosa Island, Channel Islands National Park, California' by Schumann et al. (2016).  Geomorphology 301:144-146.

Schumann, R.R., Zielinski, R.A., Otton, J.K., Pantea, M.P., Orem, W.H., 2017. Uranium delivery and uptake in a montane wetland, north-central Colorado, USA. Applied Geochemistry, v. 78, p. 363-379.

Schumann, R.R., Pigati, J.S., McGeehin, J.P., 2016. Fluvial system response to late Pleistocene-Holocene sea-level change on Santa Rosa Island, Channel Islands National Park, California. Geomorphology 268: 322-340.

Muhs, D.R., Simmons, K.R., Groves, L.T., McGeehin, J.P., Schumann, R.R., Agenbroad, L.D., 2015, Late Quaternary sea-level history and the antiquity of mammoths (Mammuthus exilis and Mammuthus columbi), Channel Islands National Park, California, USA: Quaternary Research, v. 83, p. 502-521.

Muhs, D.R., Simmons, K.R., Schumann, R.R., Groves, L.T., DeVogel, S.B., Minor, S.A., and Laurel, DeAnna, 2014, Coastal tectonics on the eastern margin of the Pacific Rim: late Quaternary sea-level history and uplift rates, Channel Islands National Park, California, USA: Quaternary Science Reviews, v. 105, p. 209-238.

Schumann, R R., Minor, S.A., Muhs, D.R., and Pigati, J.S., 2014, Landscapes of Santa Rosa Island, Channel Islands National Park, California: Monographs of the Western North American Naturalist 7, p. 48-67.

Muhs, D.R., Groves, L.T., Schumann, R.R., 2014, Interpreting the paleozoogeography and sea level history of thermally anomalous marine terrace faunas: A case study from the last interglacial complex of San Clemente Island, California: Monographs of the Western North American Naturalist 7, p. 82-108. 

Schumann, R.R., Minor, S.A., Muhs, D.R., Groves, L.T., and McGeehin, J.P., 2012, Tectonic influences on the preservation of marine terraces: Old and new evidence from Santa Catalina Island, California: Geomorphology, v. 179, p. 208-224.

Muhs, D.R., Pandolfi, J.M., Simmons, K.R., and Schumann, R.R., 2012, Sea-level history of past interglacial periods from uranium-series dating of corals, Curaçao, Leeward Antilles islands: Quaternary Research, v. 78, p. 157-169.

Muhs, D.R., Simmons, K.R., Schumann, R.R., Groves, L.T., Mitrovica, J.X., and Laurel, DeAnna, 2012, Sea-level history during the Last Interglacial complex on San Nicolas Island, California: implications for glacial isostatic adjustment processes, paleozoogeography and tectonics: Quaternary Science Reviews, v. 37, p. 1-25. [doi:10.1016/j.quascirev.2012.01.010]

Muhs, D.R., Simmons, K.R., Schumann, R.R., and Halley, R.B., 2011, Sea-level history of the past two interglacial periods: new evidence from U-series dating of reef corals from south Florida: Quaternary Science Reviews, v. 30, p. 570-590.

Muhs, D.R., Skipp, G., Schumann, R.R., Johnson, D.L., McGeehin, J.P., Beann, J., Freeman, J., Pearce, T.A., and Muhs Rowland, Z., 2009, The origin and paleoclimatic significance of carbonate sand dunes deposited on the California Channel Islands during the last glacial period, in Damiani, C.C., and Garcelon, D.K., Proceedings of the 7th California Islands Symposium: Institute for Wildlife Studies, Arcata, CA, p. 3-14.

Schumann, R.R., and Machette, M.N., 2007, Chapter F—Late Pleistocene to early Holocene paleoecology of the “Mr. Peat” wetland deposit, Alamosa County, Coloradoin Machette, M.N., Coates, M.M, and Johnson, M.J., eds., Quaternary geology of the San Luis Basin, southern Colorado and Northern New Mexico—Rocky Mountain Section Friends of the Pleistocene Guidebook, September 7-9, 2007: U.S. Geological Survey Open-File Report 2007-1193, p. 147-156.

Zielinski, R. A., Otton, J.K., Schumann, R.R., and Wirt, L., 2007, Uranium in surface waters and sediments affected by historical mining in the Denver West 1:100,000 quadrangle, Colorado: U.S. Geological Survey Scientific Investigations Report 2007-5246, 54 p.

Schumann, R.R., and Gundersen, L.C.S., 1996, Geologic and climatic controls on the radon emanation coefficient. Environment International, v. 22, Supplement 1, p. 439-446.

Schumann, R.R., Gundersen, L.C.S., and Tanner, A.B., 1994, Chapter 6—Geology and occurrence of radon, in Nagda, N.L., ed, Radon: Prevalence, measurement, health risks, and control.  American Society for Testing and Materials Manual MNL-15, p. 83-96.

Schumann, R.R., editor, 1993, Geologic radon potential of EPA Region [1-10]: U.S. Geological Survey Open-File Report 93-292-[A-K], 11 volumes, 1917 p.

Owen, D.E., Otton, J.K., Hills, F.A., and Schumann, R.R., 1992, Uranium and other elements in Colorado Rocky Mountain wetlands:  A reconnaissance study. U.S. Geological Survey Bulletin 1992, 33 p.

Schumann, R.R., Owen, D.E., and Asher-Bolinder, Sigrid, 1992, Effects of weather and soil characteristics on temporal variations in soil-gas radon concentrationsin Gates, A.E., and Gundersen, L.C.S., eds, Geologic controls on radon:  GSA Special Paper 271, p . 65-72.

Macke, D. L., Schumann, R.R., and Otton, J.K., 1990, Uranium distribution and geology in the Fish Lake surficial uranium deposit, Esmeralda County, Nevada.  U.S. Geological Survey Bulletin 1910, 22 p.

Schumann, R.R., 1989, Morphology of Red Creek, Wyoming, an arid-region anastomosing channel system.  Earth Surface Processes and Landforms, v. 14, p. 277-288.

Zielinski, R.A., and Schumann, R.R., 1987, Response of Douglas Fir (Pseudotsuga menziesii) to uraniferous groundwater in a small glaciated drainage, northeastern Washington state. Journal of Geochemical Exploration, v. 27, p. 281-298.