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Constraints on the age of the Great Sand Dunes, Colorado, from subsurface stratigraphy and OSL dates

  • Richard F. Madole (a1), Shannon A. Mahan (a2), Joe H. Romig (a3) and Jeremy C. Havens (a4)
Abstract

The age of the Great Sand Dunes has been debated for nearly 150 yr. Seven ages ranging from Miocene to late Holocene have been proposed for them. This paper presents new information–chiefly subsurface stratigraphic data, OSL dates, and geomorphic evidence–that indicates that the Great Sand Dunes began to form in the latter part of the middle Pleistocene. The dunes overlie a thick wedge of piedmont-slope deposits, which in turn overlies sediment of Lake Alamosa, a paleolake that began to drain about 440 ka. The wedge of piedmont-slope deposits extends westward for at least 23 km and is as much as 60 m thick at a distance of 10 km from the Sangre de Cristo Range. Ostracodes from one well indicate that the eastern shoreline of Lake Alamosa extended to within 4.3 km of where the Great Sand Dunes eventually formed. The time represented by the wedge of piedmont-slope deposits is not known exactly, but the wedge post-dates 440 ka and was in place prior to 130 ka because by then the dunes overlying it were sufficiently close and tall enough to obstruct streams draining from the Sangre de Cristo Range.

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*Corresponding author. Fax: + 1 303 236 5349. E-mail address: madole@usgs.gov (R.F. Madole).
References
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Andrews, Sarah. (1981). Sedimentology of Great Sand Dunes, Colorado. Society of Economic Paleontologists and Mineralogists. Special Publication 31, 279291.
Appelt, R.M., (1998). 40Ar/39Ar Geochronology and Volcanic Evolution of the Taos Plateau Volcanic Field, Northern New Mexico and Southern Colorado. M.S. thesisInstitute of Mining and Technology, Socorro, New Mexico.(58 pp.).
Burford, A.E., (1960). Geology of the Medano Peak Area, Sangre de Cristo Mountains, Colorado. Ph.D. DissertationUniversity of Michigan, Ann Arbor, Michigan.
Burford, A.E., (1961). Petrology of the Great Sand Dunes, Colorado. West Virginia Academy of Science, Proceedings 33, 8790.
H.R.S. Water Consultants Inc., . (1999). Hydrogeologic investigation of Sand Creek and Indian Springs area, Great Sand Dunes National Monument, Colorado. Report Prepared for the National Park Service. (15 pp.).
H.R.S. Water Consultants Inc., . (2009). Documentation of boundary piezometer installation Great Sand Dunes National Park & Preserve, Colorado. Report Prepared for the U.S. Department of Justice and National Park Service. (93 pp.).
Huntley, D.L., (1979). Cenozoic faulting and sedimentation in northern San Luis Valley, Colorado. Geological Society of America Bulletin 90, pt. 2 135153.
Lachmar, T.E., Hadlock, G.L., McCalpin, J.P., (1999). The hydrogeology of lower Medano Creek, Great Sand Dunes National Monument, Colorado. Schenk, C.J. Hydrologic, Geologic, and Biologic Research at Great Sand Dunes National Monument and Vicinity, Colorado. Proceedings of National Park Service Research Symposium No. 1 255265.
Lanphere, M.A., Champion, D.E., Christiansen, R.L., Izett, G.A., Obradovich, J.D., (2002). Revised ages for tuffs of the Yellowstone Plateau volcanic field: assignment of the Huckleberry Ridge Tuff to a new geomagnetic polarity event. Geological Society of America Bulletin 114, 559568.
Machette, M.N., (2007a). Stop B5—lagoons and barrier bars of ancient Lake Alamosa. Machette, M.N., Coates, M.M., Johnson, M.J. Chapter B—Field Trip Day 2, Quaternary Geology of Lake Alamosa and Costilla Plain, Colorado. Rocky Mountain Section Friends of the Pleistocene Guidebook, September 7–9, 2007. U.S. Geological Survey Open-File Report 2007 1193, 7881.
Machette, M.N., (2007b). Stop B7—Hansen Bluff—Alamosa Formation. Machette, M.N., Coates, M.M., Johnson, M.J. Chapter B—Field Trip Day 2, Quaternary Geology of Lake Alamosa and Costilla Plain, Colorado. Rocky Mountain Section Friends of the Pleistocene Guidebook, September 7–9, 2007. U.S. Geological Survey Open-File Report 2007 1193, 8588.
Machette, M.N., Marchetti, D.W., (2006). Pliocene to middle Pleistocene evolution of the Rio Grande, northern New Mexico and southern Colorado. Geological Society of America Abstracts with Program 38, 6 36.
Machette, M.N., Marchetti, D.W., Thompson, R.A., (2007). Ancient Lake Alamosa and the Pliocene to middle Pleistocene evolution of the Rio Grande. Machette, M.N., Coates, M.M., Johnson, M.J. Chapter G—Ancient Lake Alamosa and the Pliocene to Middle Pleistocene Evolution of the Rio Grande, Colorado. Rocky Mountain Section Friends of the Pleistocene Guidebook, September 7–9, 2007. U.S. Geological Survey Open-File Report 2007 1193, 157167.
Madole, R.F., Romig, J.H., Aleinikoff, J.N., VanSistine, D.P., Yacob, E.Y., (2008). On the origin and age of the Great Sand Dunes, Colorado. Geomorphology 99, 99119.
McCalpin, J.P., (1982). Quaternary geology and neotectonics of the west flank of the northern Sangre de Cristo Mountains, south-central Colorado. Colorado School of Mines Quarterly 77, 3(97 pp.).
Miggins, D.P., (2002). Chronologic, geochemical, and isotopic framework of igneous rocks within the Raton basin and adjacent Rio Grande rift, south-central Colorado and northern New Mexico. M.S. thesisUniversity of Colorado, Boulder.(417 pp.).
Miggins, D.P., Thompson, R.A., Pillmore, C.L., Snee, L.W., Stern, C.R., (2002). Extension and uplift of the northern Rio Grande Rift: Evidence from 40Ar/39Ar geochronology from the Sangre de Cristo Mountains, south-central Colorado and northern New Mexico. Menzies, M.A., Klemperer, S.L., Ebinger, C.J., Baker, J. Volcanic Rifted Margins. Boulder, Colorado, Geological Society of America Special Paper 362, 4764.
Powell, W.J., (1958). Ground-water resources of the San Luis Valley, Colorado. U.S. Geological Survey Water-Supply Paper 1379, (284 pp.).
Prescott, J.R., Hutton, J.T., (1994). Cosmic ray contributions to dose rates for luminescence and ESR dating: large depths and long-term time variations. Radiation Measurements 23, 497500.
Rogers, K.L., Repenning, C.A., Forester, R.M., Larson, E.E., Hall, S.A., Smith, G.R., Anderson, E., Brown, T.J., (1985). Middle Pleistocene (late Irvingtonian: Nebraskan) climatic changes in south-central Colorado. National Geographic Research 1, 535563.
Rogers, K.L., Larson, E.E., Smith, Gary, Katzman, Danny, Smith, G.R., Cerling, Thure, Wang, Yang, Baker, R.G., Lohmann, K.C., Repenning, C.A., Patterson, Penny, Mackie, Gerald. (1992). Pliocene and Pleistocene geologic and climatic evolution in the San Luis Valley of south-central Colorado. Palaeogeography, Palaeoclimatiology, Palaeoecology 94, 5586.
Rupert, M.G., Plummer, L.N., (2004). Ground-water flow direction, water quality, recharge sources, and age, Great Sand Dunes National Monument, south-central Colorado, 2000–2001. U.S. Geological Survey Scientific Investigations Report 2004–5027. (28 pp.).
Sarna-Wojcicki, A.M., Pringle, M.S., Wijbrans, J., (2000). New 40Ar/39Ar age of the Bishop Tuff from multiple sites and sediment rate calibration for the Matuyama–Brunhes boundary. Journal of Geophysical Research 105, B9 21,43121,444.
Siebenthal, C.E., (1910). Geology and water resources of the San Luis Valley, Colorado. U.S. Geological Survey Water-Supply Paper 240, (128 pp.).
Swancara jr., F., (1955). The archeology of the Great Sand Dunes National Monument, a preliminary survey. Southwest Lore 20, 5358.
Valdez, A., (2012). Geophysics at the Sand Dunes—probing (without really probing). The Hourglass 23, 1 2.
Wegemann, C.H., (1939). The Great Sand Dunes of Colorado. The Mines Magazine 29, 11 556558.
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Quaternary Research
  • ISSN: 0033-5894
  • EISSN: 1096-0287
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