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Recurring middle Pleistocene outburst floods in east-central Alaska

Published online by Cambridge University Press:  20 January 2017

Duane G. Froese ,
Derald G. Smith ,
John A. Westgate ,
Thomas A. Ager ,
Shari J. Preece ,
Amanjit Sandhu ,
Randolph J. Enkin  and
Florence Weber
Duane G. Froese*
Affiliation:
Department of Earth Sciences, Simon Fraser University Burnaby, British Columbia, V5A 1S6 Canada
Derald G. Smith
Affiliation:
Department of Geography, University of Calgary, 2500 University Drive, Calgary, Alberta T2N 1N4 Canada
John A. Westgate
Affiliation:
Department of Geology, University of Toronto, Toronto, Ontario, M5S 3B1, Canada
Thomas A. Ager
Affiliation:
United States Geological Survey, Mail Stop 980, Box 25046 Federal Center, Denver, CO 80225, USA
Shari J. Preece
Affiliation:
Department of Geology, University of Toronto, Toronto, Ontario, M5S 3B1, Canada
Amanjit Sandhu
Affiliation:
Department of Geology, University of Toronto, Toronto, Ontario, M5S 3B1, Canada
Randolph J. Enkin
Affiliation:
Geological Survey of Canada, 9860 West Saanich Road, Sidney, British Columbia, V8L 4B2, Canada
Florence Weber
Affiliation:
United States Geological Survey, P.O. Box 80586, Fairbanks, AK 99708, USA
*
* Corresponding author. Department of Earth and Atmospheric Sciences, University of Alberta Edmonton, Alberta, T6G 2E3 Canada. Fax: +780-492-2030. E-mail address: [email protected] (D.G. Froese).
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Abstract

Recurring glacial outburst floods from the Yukon-Tanana Upland are inferred from sediments exposed along the Yukon River near the mouth of Charley River in east-central Alaska. Deposits range from imbricate gravel and granules indicating flow locally extending up the Yukon valley, to more distal sediments consisting of at least 10 couplets of planar sands, granules, and climbing ripples with up-valley paleocurrent indicators overlain by massive silt. An interglacial organic silt, occurring within the sequence, indicates at least two flood events are associated with an earlier glaciation, and at least three flood events are associated with a later glaciation which postdates the organic silt. A minimum age for the floods is provided by a glass fission track age of 560,000 ± 80,000 yr on the GI tephra, which occurs 8 m above the flood beds. A maximum age of 780,000 yr for the floods is based on normal magnetic polarity of the sediments. These age constraints allow us to correlate the flood events to the early-middle Pleistocene. And further, the outburst floods indicate extensive glaciation of the Yukon-Tanana Upland during the early-middle Pleistocene, likely representing the most extensive Pleistocene glaciation of the area.

Keywords

Glacial chronologyTephraEarly-middle PleistoceneYukon RiverOutburst floods
Type
Research Article
Information
Quaternary Research , Volume 60 , Issue 1 , July 2003 , pp. 50 - 62
Copyright
University of Washington

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References

Begét, J.E., (2001). Continuous late Quaternary proxy climate records from loess in Beringia. Quaternary Science Reviews 20, 499–507.Google Scholar
Bigazzi, G., and Galbraith, R.F., (1999). Point-counting technique for fission track dating of glass shards, and its relative standard error. Quaternary Research 51, 67–73.Google Scholar
Brabetts, T.B., Wang, B., Meade, R.H., (2000). Environmental and hydrologic overview of the Yukon River basin, Alaska and Canada, Investigations Report 99–247. United States Geological Survey, . Water Resources Google Scholar
Carmichael, I.S.E., (1967). The iron-titanium oxides of salic volcanic rocks and their associated ferromagnesian silicates. Contributions to Mineralogy and Petrology 14, 36–64.Google Scholar
Duk-Rodkin, A., (1999). Glacial limits map of Yukon Territory. Geological Survey of Canada Open File 3694 Google Scholar
Duk-Rodkin, A., Barendregt, R.W., Froese, D.G., Weber, F., Enkin, R., Smith, R., Zazula, G.D., Waters, P., Klassen, R., (2003). Timing and extent of Plio-Pleistocene glaciations in northwestern Canada and east-central Alaska. Quaternary Science Reviews Google Scholar
Froese, D.G., (2001). Eastern Beringia paleoclimate from eolian and fluvial deposits, Plio-Pleistocene middle Yukon River, central Yukon and Alaska. Unpublished Ph.D. thesis, University of Calgary, Google Scholar
Froese, D.G., Barendregt, R.W., Enkin, R.J., and Baker, J., (2000). Paleomagnetic evidence for multiple late Pliocene-early Pleistocene glaciations in the Klondike area, Yukon Territory. Canadian Journal of Earth Sciences 37, 863–877.CrossRefGoogle Scholar
Gansecki, C.A., Mahood, G.A., and McWilliams, M., (1998). New ages for the climactic eruptions at Yellowstone. single-crystal 40Ar/39Ar dating identifies contamination. Geology 26, 343–346.Google Scholar
Gerard, R., (1984). Yukon River Freeze-up and Break-up Study. Yukon River Basin Study Hydrology Report No. 4, unpublished report Inland Waters Directorate, Environment Canada.Google Scholar
Gerard, R., Jasek, M., Hicks, F., (1992). Ice-jam Flood Assessment, Yukon River at Dawson. Unpublished Report Indian and Northern Affairs Canada, Whitehorse, Yukon.Google Scholar
Hamilton, T.D., (1994). Late Cenozoic glaciation of Alaska. Plafker, G., and Berg, H.C. The Geology of Alaska, Geological Society of America. Boulder, CO. 813–844.Google Scholar
Kirschvink, J., (1980). The least-squares line and plane and the analysis of paleomagnetic data. Geophysical Journal of the Royal Astronomical Society 62, 699–718.Google Scholar
Le Bas, M.J., Le Maitre, R.W., Streckeisen, A., and Zanellin, B., (1986). A chemical classification of volcanic rocks based on the total alkali-silica diagram. Journal of Petrology 27, 745–750.CrossRefGoogle Scholar
Manley, W.F., Briner, J.P., Lubinski, D.J., Caffee, M.W., (2002). Glacial history, surface exposure ages, and paleo-ELA’s of the Yukon-Tanana Upland: preliminary Results. 32nd Annual Arctic Workshop Abstracts, Boulder, CO.Google Scholar
Murton, J.B., Worsley, P., and Gozdzik, J., (2000). Sand veins and wedges in cold aeolian environments. Quaternary Science Reviews 19, 899–922.Google Scholar
Péwé, T.L., (1975). Quaternary Geology of Alaska. United States Geological Survey Professional Paper 835 Google Scholar
Preece, S.J., Westgate, J.A., Stemper, B.A., and Pewe, T.L., (1999). Tephrochronology of late Cenozoic loess at Fairbanks, central Alaska. Geological Society of America Bulletin 111, 71–90.Google Scholar
Preece, S.J., Westgate, J.A., Alloway, B.V., and Milner, M.W., (2000). Characterization, identity, distribution, and source of late Cenozoic tephra beds in the Klondike District of the Yukon, Canada. Canadian Journal of Earth Sciences 37, 983–996.Google Scholar
Sandhu, A.S., Westgate, J.A., and Alloway, B.V., (1993). Optimizing the isothermal plateau fission track dating method for volcanic glass shards. Nuclear Tracks 21, 479–488.Google Scholar
Sandhu, A.S., and Westgate, J.A., (1995). The correlation between reduction in fission-track diameter and areal track density in volcanic glass shards and its application in dating tephra beds. Earth and Planetary Science Letters 131, 3–4.Google Scholar
Schweger, C.E., White, J.M., Froese, D.G., (1999). Preglacial and interglacial pollen records from central and northern Yukon: 3 Ma of forest history. Canadian Quaternary Association Biannual Meeting, Program and Abstracts, Calgary, Alberta., p.34 Google Scholar
Staudacher, T.H., Jessberger, E.K., Dominik, B., Kirsten, T., and Schaeffer, O.A., (1982). 40Ar-39 Ar ages of rocks and glasses from the Nördlinger Ries Crater and the temperature history of impact breccias. Journal Geophysics 51, 1–11.Google Scholar
Waitt, R.B., (1980). About forty last-glacial Lake Missoula jokuhlhaups through southern Washington. Journal of Geology 88, 653–679.Google Scholar
Waitt, R.B., (1985). Case for periodic, colossal jokulhlaups from Pleistocene glacial Lake Missoula. Geological Society of America Bulletin 96, 1271–1286.2.0.CO;2>CrossRefGoogle Scholar
Weber, F.R., (1986). Glaciation of the Yukon-Tanana Upland. in: Hamilton, T.D., Reed, K.M., Thorson, R.M. (Editors), Glaciation in Alaska-The Geologic Record, Alaska Geological Society, pp. 79–98.Google Scholar
Weber, F.R., Hamilton, T.D., (1984). Glacial geology of the Mt. Prindle area, Yukon-Tanana Upland, Alaska, Short Notes on Alaskan Geology 1982.: Alaska Division of Geological and Geophysical Surveys Professional Report 86, pp. 42–48.Google Scholar
Westgate, J.A., Stemper, B.A., and Péwé, T.L., (1990). A 3 m.y. record of Pliocene-Pleistocene loess in interior Alaska. Geology 18, 858–861.Google Scholar
Westgate, J.A., Preece, S.J., Froese, D.G., Walter, R.C., and Schweger, C.A., (2001). Tephrochronology dates two extensive glaciations in Yukon Territory. Quaternary Research 56, 288–306.Google Scholar