Landscape evolution, valley excavation, and terrace development following abrupt postglacial base-level fall

Bulletin of the Geological Society of America

Volumn 125, Issue 11-12, 2013, Pages 1851-1864

  Gran, Karen B ^a,b   Finnegan, Noah ^b,c   Johnson, Andrea L ^a   Belmont, Patrick ^b,d   Wittkop, Chad ^e   Rittenour, Tammy ^d  

^a UNIVERSITY OF MINNESOTA DULUTH   (United States)

^b University of Minnesota   (United States)

^c UNIVERSITY OF CALIFORNIA   (United States)

^d UTAH STATE UNIVERSITY   (United States)

^e MINNESOTA STATE UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

AGRICULTURAL EXPANSION; CRITICAL FACTORS; LANDSCAPE EVOLUTIONS; LIGHT DETECTION AND RANGING; LONGITUDINAL PROFILE; NATURAL BACKGROUNDS; TRANSIENT SYSTEMS; UNCONSOLIDATED SEDIMENT;

CLIMATE CHANGE; EROSION; EXCAVATION; GLACIAL GEOLOGY; LAND USE; LANDFORMS; OPTICAL RADAR; SEDIMENTS;

RIVERS;

BANK EROSION; CLIMATE CHANGE; EROSION RATE; FLUVIAL DEPOSIT; HYDROLOGY; INCISED VALLEY; LAND USE CHANGE; LANDSCAPE EVOLUTION; LIDAR; MEANDER; NUMERICAL MODEL; POSTGLACIAL; RIVER FLOW; TERRACE; TOPOGRAPHY;

LE SUEUR RIVER; MINNESOTA; UNITED STATES;

EID: 84887242415     PISSN: 00167606     EISSN: 19432674     Source Type: Journal    
DOI: 10.1130/B30772.1     Document Type: Article

References (91)

1. Beach, T., 1994, The fate of eroded soil: Sediment sinks and sediment budgets of agrarian landscapes in southern Minnesota, 1851-1988: Annals of the Association of American Geographers, v. 84, p. 5-28, doi: 10.1111/j.1467-8306.1994.tb01726.x.
2. Begin, Z.B., Schumm, S.A., and Meyer, D.F., 1980, Knickpoint migration due to base level lowering: Journal of the Waterway Port Coastal and Ocean Division of the American Society of Civil Engineers (ASCE), v. 106, no. 3, p. 369-388.
3. Belmont, P., 2011, Floodplain width adjustments in response to rapid base level fall and knickpoint migration: Geomorphology, v. 128, p. 92-102, doi:10.1016 /j.geomorph.2010.12.026.
4. Belmont, P., Gran, K., Jennings, C.E., Wittkop, C., and Day, S.S., 2011a, Kirk Bryan field trip: Holocene landscape evolution and erosional processes in the Le Sueur River, central Minnesota, in Miller, J.D., Hudak, G.J., Wittkop, C., and McLaughlin, P.I., eds., Archean to Anthropocene: Field Guides to the Geology of the Mid-Continent of North America: Geological Society of America Field Guide 24, p. 439-455, doi:10.1130/2011.0024(21).
5. Belmont, P.B., Gran, K.B., Schottler, S.P., Wilcock, P.R., Day, S.S., Jennings, C., Lauer, J.W., Viparelli, E., Willenbring, J.K., Engstrom, D.R., and Parker, G., 2011b, Large shift in source of fine sediment in the Upper Mississippi River: Environmental Science & Technology, v. 45, no. 20, p. 8804-8810, doi:10.1021/es2019109.
6. Berlin, M.M., and Anderson, R.S., 2007, Modeling of knickpoint retreat on the Roan Plateau, western Colorado: Journal of Geophysical Research, v. 112, F03S06, doi:10.1029/2006JF000553.
7. Bettis, E.A., and Mandel, R.D., 2002, The effects of temporal and spatial patterns of Holocene erosion and alluviation on the archaeological record of the central and eastern Great Plains, USA: Geoarchaeology: International Journal (Toronto, Ontario), v. 17, no. 2, p. 141-154.
8. Bishop, P., Hoey, T.B., Jansen, J.D., and Artza, I.L., 2005, Knickpoint recession rate and catchment area: The case of uplifted rivers in eastern Scotland: Earth Surface Processes and Landforms, v. 30, p. 767-778, doi:10.1002/esp.1191.
9. Blumentritt, D.J., Wright, H.E., Jr., and Stefanova, V., 2009, Formation and early history of Lakes Pepin and St. Croix of the Upper Mississippi River: Journal of Paleolimnology, v. 41, p. 545-562, doi:10.1007 /s10933-008-9291-6.
10. Boulton, G.S., 1976, The development of geotechnical properties in glacial tills, in Legget R.F., ed., Glacial Till: The Royal Society of Canada Special Publication 12, p. 292-303.
11. Bull, W.B., 1990, Stream-terrace genesis: Implications for soil development: Geomorphology, v. 3, p. 351-367, doi:10.1016/0169-555X(90)90011-E.
12. Camill, P., Umbanhower, C.E., Jr., Teed, R., Geiss, C.E., Aldinger, J., Dvorak, L., Kenning, J., Limmer, J., and Walkup, K., 2003, Late-glacial and Holocene climatic effects on fire and vegetation dynamics at the prairieforest ecotone in south-central Minnesota: Journal of Ecology, v. 91, no. 5, p. 822-836, doi:10.1046/j.1365 -2745.2003.00812.x.
13. Chumbley, C.A., Baker, R.G., and Bettis, E.A., III, 1990, Midwestern Holocene paleoenvironments revealed by floodplain deposits in northeastern Iowa: Science, v. 249, no. 4966, p. 272-274, doi:10.1126 /science.249.4966.272.
14. Clayton, L., and Moran, S.R., 1982, Chronology of late-Wisconsinan glaciation in middle North America: Quaternary Science Reviews, v. 1, p. 55-82, doi:10.1016 /0277-3791(82)90019-1.
15. Crosby, B.T., and Whipple, K.X., 2006, Knickpoint initiation and distribution within fluvial networks: 236 waterfalls in the Waipaoa River North Island, New Zealand: Geomorphology, v. 82, no. 1-2, p. 16-38, doi:10.1016/j.geomorph.2005.08.023.
16. Davis, W.M., 1902, River terraces in New England: Bulletin of the Museum of Comparative Zoology, v. 38, p. 289-345.
17. Day, S.S., 2012, Anthropogenically-Intensified Erosion in Incising River Systems [Ph.D. dissertation]: Minneapolis, Minnesota, University of Minnesota, 242 p.
18. Day, S.S., Gran, K.B., Belmont, P., and Wawrzyniec, T., 2013, Measuring bluff erosion part 2: Pairing aerial photographs and terrestrial laser scanning to determine a watershed scale sediment budget: Earth Surface Processes and Landforms, doi:10.1002/esp.3359 (in press).
19. Dean, W.E., 1997, Rates, timing, and cyclicity of Holocene eolian activity in north-central United States: Evidence from varved lake sediments: Geology, v. 25, p. 331-334, doi:10.1130/0091-7613(1997)025<0331:RTACOH>2.3.CO;2.
20. Dean, W.E., Forester, R.M., and Bradbury, J.P., 2002, Early Holocene change in atmospheric circulation in the northern Great Plains: An upstream view of the 8.2ka cold event: Quaternary Science Reviews, v. 21, p. 1763- 1775, doi:10.1016/S0277-3791(02)00002-1.
21. Fernandez-Luque, R., and van Beek, R., 1976, Erosion and transport of bed-load sediment: Journal of Hydraulic Research, v. 14, no. 2, p. 127-144, doi:10.1080 /00221687609499677.
22. Finnegan, N.J., and Dietrich, W.E., 2011, Episodic bedrock strath terrace formation due to meander migration and cutoff: Geology, v. 39, p. 143-146, doi:10.1130 /G31716.1.
23. Finnegan, N.J., Sklar, L.S., and Fuller, T.K., 2007, Interplay of sediment supply, river incision, and channel morphology revealed by the transient evolution of an experimental bedrock: Journal of Geophysical Research, v. 112, F03S11, doi:10.1029/2006JF000569.
24. Fisher, T.G., 2003, Chronology of Glacial Lake Agassiz meltwater routed to the Gulf of Mexico: Quaternary Research, v. 59, p. 271-276, doi:10.1016/S0033-5894(03)00011-5.
25. Fuller, T.K., Perg, L.A., Willenbring, J.K., and Lepper, K., 2009, Field evidence for climate-driven changes in sediment supply leading to strath terrace formation: Geology, v. 37, p. 467-470, doi:10.1130/G25487A.1.
26. Galbraith, R.F., Roberts, R.G., Laslett, G.M., Yoshida, H., and Olley, J.M., 1999, Optical dating of single and multiple grains of quartz from Jinmium rock shelter, northern Australia. Part I: Experimental design and statistical models: Archaeometry, v. 41, p. 339-364, doi:10.1111/j.1475-4754.1999.tb00987.x.
27. Gardner, T.W., 1983, Experimental study of knickpoint and longitudinal profile evolution in cohesive, homogeneous material: Geological Society of America Bulletin, v. 94, no. 5, p. 664-672, doi:10.1130/0016-7606(1983)94 <664:ESOKAL>2.0.CO;2.
28. Gran, K.B., Belmont, P., Day, S.S., Jennings, C., Johnson, A., Perg, L., and Wilcock, P.R., 2009, Geomorphic evolution of the Le Sueur River, Minnesota, USA, and implications for current sediment loading, in James, L.A., Rathburn, S.L., and Whittecar, G.R., eds., Management and Restoration of Fluvial Systems with Broad Historical Changes and Human Impacts: Geological Society of America Special Paper 451, p. 119-130.
29. Gran, K.B., Belmont, P., Day, S.S., Finnegan, N., Jennings, C., Lauer, J.W., and Wilcock, P.R., 2011a, Landscape evolution in south-central Minnesota and the role of geomorphic history on modern erosional processes: GSA Today, v. 21, no. 9, p. 7-9, doi:10.1130/G121A.1.
30. Gran, K.B., Belmont, P., Day, S., Jennings, C., Lauer, J.W., Viparelli, E., Wilcock, P., and Parker, G., 2011b, An Integrated Sediment Budget for the Le Sueur River Basin: Final Report to the Minnesota Pollution Control Agency, 119 p (unpublished).
31. Hancock, G.S., and Anderson, R.S., 2002, Numerical modeling of fluvial strath-terrace formation in response to oscillating climate: Geological Society of America Bulletin, v. 114, p. 1131-1142, doi:10.1130/0016-7606 (2002)114<1131:NMOFST>2.0.CO;2.
32. Hancock, G.R., and Willgoose, G.R., 2002, The use of a landscape simulator in the validation of the Siberia landscape evolution model: Transient landforms: Earth Surface Processes and Landforms, v. 27, p. 1321-1334, doi:10.1002/esp.414.
33. Hasbargen, L.E., and Paola, C., 2000, Landscape instability in an experimental drainage basin: Geology, v. 28, no. 12, p. 1067-1070, doi:10.1130/0091-7613 (2000)28<1067:LIIAED>2.0.CO;2.
34. Hasbargen, L.E., and Paola, C., 2003, How predictable is local erosion rate in eroding landscapes?, in Wilcock, P.R., and Iverson, R.M., eds., Prediction in Geomorphology: American Geophysical Union Geophysical Monograph 135, p. 1-10, doi:10.1029/135GM16.
35. Hilley, G.E., and Arrowsmith, R., 2008, Geomorphic response to uplift along the Dragon's Back pressure ridge, Carrizo Plain, California: Geology, v. 36, p. 367-370, doi:10.1130/G24517A.1.
36. Howard, A.D., 1994, A detachment-limited model of drainage basin evolution: Water Resources Research, v. 30, p. 2261-2285, doi:10.1029/94WR00757.
37. Howard, A.D., and Kerby, G., 1983, Channel changes in badlands: Geological Society of America Bulletin, v. 102, p. 233-242.
38. Howard, A.D., and Knutson, T.R., 1984, Sufficient conditions for river meandering: A simulation approach: Water Resources Research, v. 20, no. 11, p. 1659-1667.
39. Hudak, C.M., and Hajic, E.R., 2005, Landscape evolution of the Minnesota River valley: Geological Society of America Abstracts with Programs, v. 37, no. 5, p. 8.
40. Jennings, C.E., 2007, Overview of the Quaternary Geologic History of the Minnesota River, in Native Plant Communities and Rare Species of the Minnesota River Valley Counties: St. Paul, Minnesota Department of Natural Resources, Division of Ecological Resources, Minnesota County Biological Survey Biological Report 89, p. 2.1-2.12.
41. Jennings, C.E., 2010, Draft Digital Reconnaissance Surficial Geology and Geomorphology of the Le Sueur River Watershed (Blue Earth, Waseca, Faribault, and Freeborn Counties in South-Central MN): Minnesota Geological Survey Open File Report 10-03, map, report and digital files at ftp://mgssun6.mngs.umn.edu/pub4/ofr10_03/.
42. Johnson, A.L., 2012, Timing and Pattern of Valley Excavation, Le Sueur River, South-Central Minnesota, USA [M.S. thesis]: Duluth, Minnesota, University of Minnesota, 53 p.
43. Knox, J.C., 1985, Responses of floods to Holocene climatic change in the Upper Mississippi Valley: Quaternary Research, v. 23, no. 3, p. 287-300, doi:10.1016/0033 -5894(85)90036-5.
44. Knox, J.C., 2000, Sensitivity of modern and Holocene floods to climate change: Quaternary Science Reviews, v. 19, p. 439-457, doi:10.1016/S0277-3791(99)00074-8.
45. Knox, J.C., 2006, Floodplain sedimentation in the Upper Mississippi Valley: Natural versus human accelerated: Geomorphology, v. 79, p. 286-310, doi:10.1016 /j.geomorph.2006.06.031.
46. Kunkel, K.E., Andsager, K., and Easterling, D.R., 1999, Long-term trends in extreme precipitation events over the conterminous United States and Canada: Journal of Climate, v. 12, p. 2515-2527, doi:10.1175/1520-0442 (1999)012<2515:LTTIEP>2.0.CO;2.
47. Laird, K.R., Fritz, S.C., Grimm, W.C., and Mueller, P.G., 1996, Century-scale paleoclimatic reconstruction from Moon Lake, a closed-basin lake in the northern Great Plains: Limnology and Oceanography, v. 41, no. 5, p. 890-902, doi:10.4319/lo.1996.41.5.0890.
48. Lenhart, C.F., Peterson, H., and Nieber, J., 2011a, Increased streamflow in agricultural watersheds of the Midwest: Implications for management: Watershed Science Bulletin, Spring 2011, p. 25-31.
49. Lenhart, C.F., Verry, E.S., Brooks, K.N., and Magner, J.A., 2011b, Adjustment of prairie pothole streams to landuse, drainage, and climate changes and consequences for turbidity impairment: River Research and Applications, v. 28, p. 1609-1619, doi:10.1002/rra.1549.
50. Lepper, K., Fisher, T.G., Hajdas, I., and Lowell, T.V., 2007, Ages for the big stone moraine and the oldest beaches of Glacial Lake Agassiz: Implications for deglaciation chronology: Geology, v. 35, p. 667-670, doi:10.1130 /G23665A.1.
51. Lian, O., and Roberts, R.G., 2006, Dating the Quaternary: Progress in luminescence dating of sediments: Quaternary Science Reviews, v. 25, p. 2449-2468, doi:10.1016/j.quascirev.2005.11.013.
52. Marschner, F.J., 1930, Interpretation of Francis J. Marschner's map of the original vegetation of Minnesota: Based on the notes of the Public Land Survey, 1847-1907: St. Paul, Minnesota, North Central Forest Experiment Station, U.S. Department of Agriculture.
53. Matsch, C.L., 1983, River Warren, the southern outlet of Lake Agassiz, in Teller, J.T., and Clayton, L., eds., Glacial Lake Agassiz: Geological Association of Canada Special Paper 26, p. 232-244.
54. Meyer, G.N., Knaeble, A.R., Lusardi, B.A., Jennings, C.E., and Gowan, A.S., 2012, Quaternary Stratigraphy, Plate 4, in Runkel, A.C., Meyer, G.N., and Lusardi, B.A., Geologic Atlas of Blue Earth County, Minnesota [Part A]: Minnesota Geologic Survey County Atlas Series, Atlas C-26, 6 plates, 1:100,000 scale.
55. Minnesota Department of Natural Resources, 2007, Native Plant Communities and Rare Species of the Minnesota River Valley Counties: Minnesota County Biological Survey Biological Report 89
56. Montgomery, D.R., 2004, Observations on the role of lithology in strath terrace formation and bedrock channel width: American Journal of Science, v. 304, no. 5, p. 454-476.
57. Murray, A.G., and Wintle, A.G., 2000, Luminescence dating of quartz using an improved single-aliquot regenerative-dose protocol: Radiation Measurements, v. 32, no. 1, p. 57-73, doi:10.1016/S1350-4487(99)00253-X.
58. Murray, A.S., and Wintle, A.G., 2003, The single aliquot regenerative dose protocol: Potential for improvements in reliability: Radiation Measurements, v. 37, p. 377- 381, doi:10.1016/S1350-4487(03)00053-2.
59. Musser, K., Kudelka, S., and Moore, R., 2009, Minnesota River Basin Trends Report: http://mrbdc.wrc.mnsu.edu/mnbasin/trends/index.html (last accessed May 2013), 66 p.
60. Novotny, E.V., and Stefan, H.G., 2007, Stream flow in Minnesota: Indicator of climate change: Journal of Hydrology (Amsterdam), v. 334, p. 319-333, doi:10.1016 /j.jhydrol.2006.10.011.
61. Olley, J.M., Caitcheon, G.G., and Roberts, R.G., 1999, The origin of dose distributions in fluvial sediments, and the prospect of dating single grains from fluvial deposits using optically stimulated luminescence: Radiation Measurements, v. 30, no. 2, p. 207-217, doi:10.1016 /S1350-4487(99)00040-2.
62. Palmer, M.A., Covich, A.P., Lake, S., Biro, P., Brooks, J.J., Cole, J., Dahm, C., Gibert, J., Goedkoop, W., Martens, K., Verhoeven, J., and Van De Bund, W.J., 2000, Linkages between aquatic sediment biota and life above sediments as potential drivers of biodiversity and ecological processes: Bioscience, v. 50, p. 1062-1075, doi:10.1641 /0006-3568(2000)050[1062:LBASBA]2.0.CO;2.
63. Parker, R.S., 1977, Experimental Study of Drainage Basin Evolution and its Hydrology Implications [Ph.D. thesis]: Fort Collins, Colorado, Colorado State University, 331 p.
64. Reimer, P.J., Baillie, M.G.L., Bard, E., Bayliss, A., Beck, J.W., Blackwell, P.G., Bronk Ramsay, 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.S., Talamo, S., Turney, C.S.M., van der Plicht, J., and Weyhenmeyer, C.E., 2009, IntCal09 and Marine09 radiocarbon age calibration curves, 0-50,000 years cal BP: Radiocarbon, v. 51, no. 4, p. 1111-1150.
65. Rittenour, T.M., 2008, Luminescence dating of fluvial deposits: Applications to geomorphic, palaeoseismic, and archaeological research: Boreas, v. 37, p. 613-635, doi:10.1111/j.1502-3885.2008.00056.x.
66. Schottler, S.P., Ulrich, J., Belmont, P., Moore, R., Lauer, J.W., Engstrom, D.R., and Almendinger, J.E., 2013, Twentieth century agricultural drainage creates more erosive rivers: Hydrologic Processes, doi:10.1002 /hyp.9738 (in press).
67. Seeley, M., 2003, Climate Trends: What Are Some Implications for Minnesota's Air and Water Resources?: http:// www.pca.state.mn.us/index.php/air/air/view-category /Page-1/Page-6.html (accessed July 2012).
68. Seidl, M.A., and Dietrich, W.E., 1994, The problem of channel incision into bedrock: Catena, v. 23, supplement, p. 101-124.
69. Shay, C.T., 1967, Vegetation history of the southern Lake Agassiz basin during the past 12,000 years, in Mayer-Oakes, W.J., ed., Life, Land, and Water: Proceedings of the 1960 Conference on Environmental Studies of the Glacial Lake Agassiz Basin: Winnipeg, Canada, University of Manitoba Press, p. 231-252.
70. Shields, A., 1936, Anwendung der Aehnlichkeitsmechanik und der Turbulenzforschung auf die Geschiebebewegung [Application of similarity principles and turbulence research to bed-load movement]: Mitteilungen der Preußischen Versuchsanstalt für Wasserbau, v. 26.
71. Stock, J.D., and Montgomery, D.R., 1999, Geologic constraints on bedrock river incision using the stream power law: Journal of Geophysical Research, v. 104, p. 4983-4993, doi:10.1029/98JB02139.
72. 14C dates: Radiocarbon, v. 35, p. 317-322.
73. Thoma, D.P., Gupta, S.C., Bauer, M.E., and Kirchoff, C.E., 2005, Airborne laser scanning for riverbank erosion assessment: Remote Sensing of Environment, v. 95, p. 493-501, doi:10.1016/j.rse.2005.01.012.
74. Thorleifson, L.H., 1996, Review of Lake Agassiz history, in Teller, J.T., Thorleifson, L.H., Matile, G., and Brisbin, W.C., eds., 1996, Sedimentology, Geomorphology and History of the Central Lake Agassiz Basin-Field Trip Guidebook B2: Winnipeg, Manitoba, Geological Association of Canada/Mineralogical Association of Canada, Annual Meeting, May 27-29 1996.
75. Upham, W., 1890, Report of Exploration of the Glacial Lake Agassiz in Manitoba: Geological Survey of Canada Annual Report 1888-89, part E, 156 p.
76. Upham, W., 1895, The Glacial Lake Agassiz: U.S. Geological Survey Monograph 25, 658 p.
77. U.S. Environmental Protection Agency, 2012, Water Quality Assessment and TMDL Information, 2011: http:// ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control (accessed 22 June 2012).
78. Vandenberghe, D., Derese, C., and Houbrechts, G., 2007, Residual doses in recent alluvial sediments from the Ardenne (S. Belgium): Geochronometria, v. 28, p. 1-8, doi:10.2478/v10003-007-0024-z.
79. van der Beek, P., and Bishop, P., 2003, Cenozoic river profile development in the Upper Lachlan catchment (SE Australia) as a test of quantitative fluvial incision models: Journal of Geophysical Research, v. 108, p. 2309, doi:10.1029/2002JB002125.
80. Wallinga, J., 2002, Optically stimulated luminescence dating of fluvial deposits: A review: Boreas, v. 31, p. 303- 322, doi:10.1080/030094802320942536.
81. Water Resources Center, Minnesota Pollution Control Agency, 2009, State of the Minnesota River: Summary of Water Quality Monitoring 2000-2008, 37 p, http://mrbdc.mnsu.edu/sites/mrbdc.mnsu.edu/files/public/reports /basin/statemr08.html (last accessed May 2013).
82. Webb, T., and Bryson, R.A., 1972, Late- and postglacial climactic change in the northern Midwest: Quaternary Research, v. 2, p. 70-115, doi:10.1016/0033-5894 (72)90005-1.
83. Wegmann, K.W., and Pazzaglia, F.J., 2009, Late Quaternary fluvial terraces of the Romagna and Marche Apennines, Italy: Climatic, lithologic, and tectonic controls on terrace genesis in an active orogeny: Quaternary Science Reviews, v. 28, p. 137-165, doi:10.1016 /j.quascirev.2008.10.006.
84. Whipple, K.X., 2004, Bedrock rivers and the geomorphology of active orogens: Annual Review of Earth and Planetary Sciences, v. 32, p. 151-185, doi:10.1146 /annurev.earth.32.101802.120356.
85. Whipple, K.X., and Tucker, G., 2002, Implications of sediment-flux dependent river incision models for landscape evolution: Journal of Geophysical Research, v. 107, no. B2, p. ETG 3-1-ETG 3-20, doi:10.1029 /2000JB000044.
86. Whipple, K.X., Snyder, N.F., and Dollenmayer, K., 2000, Rates and processes of bedrock incision by the Upper Ukaka River since the 1912 Novarupta ash flow in the Valley of Ten Thousand Smokes, Alaska: Geology, v. 28, p. 835-838, doi:10.1130/0091-7613(2000)28<835: RAPOBI>2.0.CO;2.
87. Wilcock, P., on behalf of the Minnesota River Sediment Colloquium Committee, 2009, Identifying Sediment Sources in the Minnesota River Basin: Synthesis Report for Minnesota River Sediment Colloquium: Report for Minnesota Pollution Control Agency, http://www.pca.state.mn.us/index.php/view-document.html?gid =8099 (last accessed May 2013), 16 p.
88. Wintle, A.G., and Murray, A.S., 2006, A review of optically stimulated luminescence characteristics and their relevance in single-aliquot regeneration: Radiation Measurements, v. 41, p. 369-391, doi:10.1016/j.radmeas.2005.11.001.
89. Wohl, E.E., Greenbaum, N., Schick, A.P., and Baker, V.R., 1994, Controls on bedrock channel incision along Nahal Paran, Israel: Earth Surface Processes and Landforms, v. 19, p. 1-13, doi:10.1002/esp.3290190102.
90. Wright, H.E., Jr., Stefanova, I., Tian, J., Brown, T.A., and Hu, F.S., 2004, A chronological framework for the Holocene vegetational history of central Minnesota: The Steel Lake pollen record: Quaternary Science Reviews, v. 23, p. 611-626, doi:10.1016/j.quascirev.2003.09.003.
91. Yu, Z.C., McAndrews, J., and Eicher, U., 1997, Middle Holo cene dry climate caused by change in atmospheric circulation patterns: Evidence from lake levels and stable isotopes: Geology, v. 25, p. 251-254, doi:10.1130 /0091-7613(1997)025<0251:MHDCCB>2.3.CO;2.