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A geochronologic framework for the Ziegler Reservoir fossil site, Snowmass Village, Colorado

  • Shannon A. Mahan (a1), Harrison J. Gray (a1), Jeffrey S. Pigati (a2), Jim Wilson (a3), Nathaniel A. Lifton (a4), James B. Paces (a5) and Maarten Blaauw (a6)...

Abstract

The Ziegler Reservoir fossil site near Snowmass Village, Colorado (USA), provides a unique opportunity to reconstruct high-altitude paleoenvironmental conditions in the Rocky Mountains during the Last Interglacial Period. We used four different techniques to establish a chronological framework for the site. Radiocarbon dating of lake organics, bone collagen, and shell carbonate, and in situ cosmogenic 10Be and 26Al ages on a boulder on the crest of a moraine that impounded the lake suggest that the ages of the sediments that hosted the fossils are between ~140 ka and >45 ka. Uranium-series ages of vertebrate remains generally fall within these bounds, but extremely low uranium concentrations and evidence of open-system behavior limit their utility. Optically stimulated luminescence (OSL) ages (n = 18) obtained from fine-grained quartz maintain stratigraphic order, were replicable, and provide reliable ages for the lake sediments. Analysis of the equivalent dose (DE) dispersion of the OSL samples showed that the sediments were fully bleached prior to deposition and low scatter suggests that eolian processes were likely the dominant transport mechanism for fine-grained sediments into the lake. The resulting ages show that the fossil-bearing sediments span the latest part of Marine Oxygen Isotope Stage (MIS) 6, all of MIS 5 and MIS 4, and the earliest part of MIS 3.

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Corresponding author

Corresponding author.E-mail address: smahan@usgs.gov (S.A. Mahan).

References

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Aitken, M.J. Thermoluminescence Dating. (1985). Academic Press, London.
Aitken, M.J. An Introduction to Optical Dating: The Dating of Quaternary Sediments by the Use of Photon-stimulated Luminescence. (1998). Oxford University Press, Oxford.
Alexanderson, H., and Murray, A.S. Problems and potential of OSL dating Weichselian and Holocene sediments in Sweden. Quaternary analysis Science Reviews 44, (2012). 3750. http://dx.doi.org/10.1016/j.quascirev.2009.09.020
Anderson, R.S., Jimenez-Moreno, G., Ager, T., and Porinchu, D.F. High-elevation paleoenvironmental change during MIS 6–4 in Colorado's Central Rockies as determined from pollen an. Quaternary Research 82, (2014). 542552. (in this volume)
Balco, G., and Shuster, D.L. 26Al 10Be 21Ne burial dating. Earth and Planetary Science Letters 286, 3–4 (2009). 570575. http://dx.doi.org/10.1016/j.epsl.2009.07.025
Balco, G., Stone, J.O., Lifton, N.A., and Dunai, T.J. A complete and easily accessible means of calculating surface exposure ages or erosion rates from Be-10 and Al-26 measurements. Quaternary Geochronology 3, 3 (2008). 174195. http://dx.doi.org/10.1016/j.quageo.2007.12.001
Bateman, M.D. Luminescence dating of periglacial sediments and structures. Boreas 37, (2008). 574588. http://dx.doi.org/10.1111/j.1502-3885.2008.00050.x
Bateman, M.D., Swift, D.A., Piotrowski, J.A., and Sanderson, D.C.W. Investigating the effects of glacial shearing of sediment on luminescence. Quaternary Geochronology 10, (2012). 230236.
Blaauw, M. Out of tune: the dangers of aligning proxy archives. Quaternary Science Reviews 36, (2012). 3849.
Blaauw, M., and Christen, J.A. Flexible paleoclimate age − depth models using an autoregressive gamma process. Bayesian Analysis 6, (2011). 457474.
Blackwelder, E. Post-Cretaceous history of the mountains of central western Wyoming. Journal of Geology 23, (1915). 97117. (193–217, 307–340)
Briner, J.P., Young, N.E., Goehring, B.M., and Schaefer, J.M. Constraining Holocene 10Be production rates in Greenland. Journal of Quaternary Science 27, 1 (2012). 26. http://dx.doi.org/10.1002/jqs.1562
Bunker, C.M., and Bush, C.A. Uranium, thorium, and radium analyses by gamma-ray spectrometry (0.184–0.352 million electron volts). U.S. Geological Survey Professional Paper 550-B. (1966). B176B181.
Bunker, C.M., and Bush, C.A. A comparison of potassium analyses by gamma-ray spectrometry and other techniques. U.S. Geological Survey Professional Paper 575-B. (1967). B164B169.
Delanghe, D., Bard, D., and Hamelin, B. New TIMS constraints on the uranium-238 and uranium-234 in seawaters from the main ocean basins and Mediterranean Sea. Marine Chemistry 80, (2002). 7993.
Duller, G.A.T. Assessing the error on equivalent dose estimates derived from single aliquot regenerative dose measurements. Ancient TL 25, (2007). 1524.
Duller, G.A.T. Luminescence Dating: Guidelines on Using Luminescence Dating in Archaeology. (2008). English Heritage, Swindon. (45 pp.)
Elias, S.A. Environmental interpretation of fossil insect assemblages from MIS 5 at Ziegler Reservoir, Snowmass, Colorado. Quaternary Research 82, (2014). 592603. (in this volume)
Fuchs, M., and Owen, L.A. Luminescence dating of glacial and associated sediments: review, recommendations and future directions. Boreas 37, (2008). 636659.
Fuchs, M., and Wagner, G.A. Recognition of insufficient bleaching by small aliquots of quartz for reconstructing soil erosion in Greece. Quaternary Science Reviews 22, 10–13 (2003). 11611167. http://dx.doi.org/10.1016/S0277-3791(03)00039-8
Galbraith, R.F., and Green, P.F. Estimating the component ages in a finite mixture. Radiation Measurements 17, (1990). 197206.
Galbraith, R.F., Roberts, R.G., Laslett, G.M., Yoshida, H., and Olley, J.M. Optical dating of single and multiple grains of quartz from Jinmium Rock Shelter, northern Australia, part 1: experimental design and statistical models. Archaeometry 41, (1999). 339364.
Goehring, B.M., Kelly, M.A., Schaefer, J.M., Finkel, R.C., and Lowell, T.V. Dating of raised marine and lacustrine deposits in east Greenland using beryllium-10 depth profiles and implications for estimates of subglacial erosion. Journal of Quaternary Science 25, (2010). 865874.
Goehring, B.M., Mangerud, J., Svendsen, J.I., Schaefer, J.M., and Finkel, R.C. Late glacial and Holocene 10Be production rates for western Norway. Journal of Quaternary Science 27, 1 (2011). 8996. http://dx.doi.org/10.1002/jqs.1517
Gosse, J.C., and Phillips, F.M. Terrestrial in situ cosmogenic nuclides: theory and applications. Quaternary Science Reviews 40, 14 (2001). 14751560.
Haskett, D.R., and Porinchu, D.F. A quantitative midge-based reconstruction of mean July air temperature from a high-elevation site in central Colorado, USA, for MIS 6 and 5. Quaternary Research 82, (2014). 580591. (in this volume)
Hedges, R.E.M. Radiocarbon dating with an accelerator: review and preview. Archaeometry 23, 1 (1981). 318.
Heisinger, B., Lal, D., Jull, A., Kubik, P., Ivy-Ochs, S., Neumaier, S., Knie, K., Lazarev, V., and Nolte, E. Production of selected cosmogenic radionuclides by muons 1. Fast muons. Earth and Planetary Science Letters 200, 3–4 (2002). 345355.
Heisinger, B., Lal, D., Jull, A., Kubik, P., Ivy-Ochs, S., Knie, K., and Nolte, E. Production of selected cosmogenic radionuclides by muons: 2. Capture of negative muons. Earth and Planetary Science Letters 200, 3–4 (2002). 357369.
Ivanovich, M., and Harmon, R.S. Uranium-series Disequilibrium: Applications to Earth, Marine, and Environmental Sciences. second ed. (1992). Clarendon Press, Oxford, U.K.. (910 pp.)
Kaplan, M.R., Strelin, J.A., Schaefer, J.M., Denton, G.H., Finkel, R.C., Schwartz, R., Putnam, A.E., Vandergoes, M.J., Goehring, B.M., and Travis, S.G. In-situ cosmogenic 10Be production rate at Lago Argentino, Patagonia: implications for late-glacial climate chronology. Earth and Planetary Science Letters 309, 1–2 (2011). 2132. http://dx.doi.org/10.1016/j.epsl.2011.06.018
Kohl, C., and Nishiizumi, K. Chemical isolation of quartz for measurement of in-situ-produced cosmogenic nuclides. Geochimica et Cosmochimica Acta 56, 9 (1992). 35833587.
Ku, T.-L. Uranium-series methods. Quaternary Geochronology: Methods and Applications. Reference Shelf 4, (2000). American Geophysical Union, 101114.
Lal, D. Cosmic ray labeling of erosion surfaces—in situ nuclide production rates and erosion models. Earth and Planetary Science Letters 104, 2–4 (1991). 424439.
Lang, A. Infrared stimulated luminescence dating of Holocene reworked silty sediments. Quaternary Science Reviews 13, 5–7 (1994). 525528.
Lepper, K., Gorz, K.L., Fisher, T.G., and Lowell, T.V. Age determinations for glacial Lake Agassiz shorelines west of Fargo, North Dakota, USA. Canadian Journal of Earth Sciences 48, (2011). 11991207.
Lian, O.B., and Roberts, R.G. Dating the Quaternary: progress in luminescence dating of sediments. Quaternary Science Reviews 25, (2006). 24492468.
Licciardi, J.M. Alpine Glacier and Pluvial Lake Records of Late Pleistocene Climate Variability in the Western Unites States. Ph.D. Dissertation (2000). Oregon State University, Corvallis, Oregon. (155 pp.)
Lucking, C., Johnson, K.R., Pigati, J.S., and Miller, I.M. Primary mapping, stratigraphic data and field methods for the Snowmastodon Project. Denver Museum of Nature and Science Technical Report #2012-04. (2012). 1102.
Ludwig, K.R. User's manual for Isoplot 3.00 a geochronological toolkit for Microsoft Excel. Berkeley Geochronology Center Special Publication, No. 4. (2003). (73 pp.)
Ludwig, K.R., and Paces, J.B. Uranium-series dating of pedogenic silica and carbonate, Crater Flat, Nevada. Geochimica et Cosmochimica Acta 66, (2002). 487506.
Ludwig, K.R., and Titterington, D.M. Calculation of 230Th/U isochrones, ages, and errors. Geochimica et Cosmochimica Acta 58, (1994). 50315042.
Mahan, S.A., Miller, D.M., Menges, C.M., and Yount, J.C. Late Quaternary stratigraphy and luminescence geochronology of the northeastern Mojave Desert. Quaternary International 166, (2007). 6178.
Murray, A.S., and Olley, J.M. Precision and accuracy in the optically stimulated luminescence dating of sedimentary quartz: a status review. Geochronometria 21, (2002). 116.
Murray, A.S., and Wintle, A.G. The single aliquot regenerative dose protocol: potential for improvements in reliability. Radiation Measurements 37, (2003). 377381.
Murray, A.S., Marten, R., Johnston, A., and Martin, P. Analysis for naturally occurring radionuclides at environmental concentrations by gamma spectrometry. Journal of Radioanalytical and Nuclear Chemistry 115, (1987). 263288.
Nishiizumi, K. Preparation of 26Al AMS standards. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 223, (2004). 388392. http://dx.doi.org/10.1016/j.nimb.2004.04.075
Nishiizumi, K., Imamura, M., Caffee, M., Southon, J., Finkel, R.C., and Mcaninch, J. Absolute calibration of 10Be AMS standards. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 258, 2 (2007). 403413. http://dx.doi.org/10.1016/j.nimb.2007.01.297
Ochs, M., and Ivy-Ochs, S. The chemical behavior of Be, Al, Fe, Ca and Mg during AMS target preparation from terrestrial silicates modeled with chemical speciation calculations. Nuclear Instruments and Methods in Physics Research Section B 123, (1997). 235240. http://dx.doi.org/10.1016/S0168-583X(96)00680-5
Owen, L.A., Bright, J., Finkel, R.C., Jaiswal, M.K., Kaufman, D.S., Mahan, S., Radtke, U., Schneider, J.S., Sharp, W., Singhvi, A.K., and Warren, C.N. Numerical dating of a late Quaternary spit–shoreline complex at the northern end of Silver Lake Playa, Mojave Desert, California: a comparison of the applicability of radiocarbon, luminescence, terrestrial cosmogenic nuclide, electron spin resonance, U-series and amino acid racemization methods. Quaternary International 166, (2007). 87110.
Pierce, K.L. Pleistocene glaciations of the Rocky Mountains. Developments in Quaternary Sciences 1, (2003). 6376.
Pigati, J.S., Miller, I.M., Jonson, K.R., Honke, J.S., Carrara, P.E., Muhs, D.R., Skipp, G., and Bryant, B. Geologic setting and stratigraphy of the Ziegler Reservoir fossil site, Snowmass Village, Colorado. Quaternary Research 82, (2014). 477489. (in this volume)
Pike, A.W.G., Hedges, R.E.M., and Van Calsteren, P. U-series dating of bone using the diffusion–adsorption model. Geochimica et Cosmochimica Acta 66, 24 (2002). 42734286.
Prescott, J.R., and Hutton, J.T. Cosmic ray contributions to dose rates for luminescence and ESR dating: large depths and long-term time variations. Radiation Measurements 23, (1994). 497500.
Putnam, A.E., Schaefer, J.M., Barrell, D.J.A., Vandergoes, M., Denton, G.H., Kaplan, M.R., Finkel, R.C., Schwartz, R., Goehring, B.M., and Kelley, S.E. In situ cosmogenic 10Be production-rate calibration from the Southern Alps, New Zealand. Quaternary Geochronology 5, 4 (2010). 392409. http://dx.doi.org/10.1016/j.quageo.2009.12.001
Reimer, P.J., Baillie, M.G.L., Bard, E., Bayliss, A., Beck, J.W., Blackwell, P.G., Bronk Ramsey, C., Buck, C.E., Burr, G.S., Edwards, R.L., Friedrich, M., Grootes, P.M., Guilderson, T.P., Hajdas, I., Heaton, T.J., Hogg, A.G., Hughen, K.A., Kaiser, K.F., Kromer, B., McCormac, F.G., Manning, S.W., Reimer, R.W., Richards, D.A., Southon, J.R., Talamo, S., Turney, C.S.M., van der Plicht, J., and Weyhenmeyer, C.E. IntCal09 and Marine09 radiocarbon age calibration curves, 0–50,000 years cal BP. Radiocarbon 51, 4 (2009). 11111150.
Rhodes, E.J. Optically stimulated luminescence dating of sediments over the past 200,000 years. Annual Review of Earth and Planetary Sciences 39, (2011). 461488.
Rhodes, E.J., Singarayer, J.S., Raynal, J.P., Westaway, K.E., and Sbihi-Alaoui, F.Z. New age estimates for the Palaeolithic assemblages and Pleistocene succession of Casablanca, Morocco. Quaternary Science Reviews 25, (2006). 25692585.
Rodnight, H. How many equivalent dose values are needed to obtain a reproducible distribution?. Ancient TL 26, 1 (2008). 39.
Sharpe, S.E., and Bright, J. A high-elevation MIS 5 hydrologic record using mollusks and ostracodes from Snowmass Village, Colorado, USA. Quaternary Research 82, (2014). 604617. (in this volume)
Simms, A.R., DeWitt, R., Kouremenos, P., and Drewry, A.M. A new approach to reconstructing sea levels in Antarctica using optically stimulated luminescence of cobble surfaces. Quaternary Geochronology 6, (2011). 5060.
Snyder, S.L., and Duval, J.S. Design and construction of a gamma-ray spectrometer system for determining natural radioactive concentrations in geological samples at the U.S. Geological Survey in Reston, Virginia. U.S. Geological Survey Open-File Report 03–29. (2003). (on-line only, http://pubs.usgs.gov/of/2003/of03-029/)
Stone, J. Air pressure and cosmogenic isotope production. Journal of Geophysical Research 105, B10 (2000). 23,75323,759.
Strelow, F., Weinert, C., and Eloff, C. Distribution coefficients and anion exchange behavior of elements in oxalic acid–hydrochloric acid mixtures. Analytical Chemistry 44, 14 (1972). 23522356.
Strickland, L.E., Baker, R.G., Thompson, R.S., and Miller, D.M. Last interglacial plant macrofossils and climates from Ziegler Reservoir, Snowmass Village, Colorado. Quaternary Research 82, (2014). 553566. (in this volume)
Stuiver, M., and Reimer, P. University of Washington Quaternary Isotope Lab Radiocarbon Calibration Program Rev. 3.0.3A. Radiocarbon 35, (1993). 215230.
Watanabe, Y., and Nakai, S. U–Th radioactive disequilibrium analyses for JCP-1, coral reference distributed by the Geological Survey of Japan. Geochemical Journal 40, (2006). 537541.
Wintle, A.G., and Murray, A.S. A review of quartz optically stimulated luminescence characteristics and their relevance in single-aliquot regeneration dating protocols. Radiation Measurements 41, (2006). 369391.

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