Clearwater Lake, Saskatchewan, is a relatively shallow, topographically closed, perennial lake cen trally located in the Palliser Triangle region of western Canada. Despite its present-day small size, Clearwater Lake is one of only a few lacustrine basins in this vast 400 000 km2 region of the northern Great Plains whose stratigraphic record extends to the early Holocene. Multiple proxy indicators are used to interpret the early-Holocene limnologic and hydrologic conditions in the basin. Changes in solute chemistry and concentration are reflected by siliceous microfossils and the endogenic and authigenic mineralogy of the sediment. The diatoms also provide evidence of fluctuations in water depth and water column stratification. Plant macrofossil assemblages, sediment texture and bedding features, and detrital mineralogy help to reconstruct drainage basin conditions and water level changes. Stable O-nd C-isotopic composition of inorganically precipitated, endo genic carbonate minerals provide insight into the hydrologic budget of the basin and the residence time of the water. An early-Holocene shallow, clastic-dominated, freshwater lake, probably surrounded by boreal forest type vegetation, was followed by a mesosaline to hypersaline phase between 9800 and 8600 BP. A fresh to hyposaline lake with an open basin hydrology returned after 8600 BP and persisted until at least 6600 BP except for a short episode of higher salinity, closed-basin evaporitic conditions about 8200–7700 BP.
Aharonson, E.F. , Karasikov, N. , Roitberg, M. and Shamir, J.1986: GALAI-CIS-1 – A novel approach to aerosol particle size analysis .Journal of Aerosol Science17, 530–536 .
2.
Al-Aasm, I.S.1990: Stable isotope analysis of multiple carbonate samples using selective acid extraction .Chemical Geology80, 119–125 .
Baker, P.A. and Kastner, M.1981: Constraints on the formation of sedimentary dolomite .Science213, 214–216 .
5.
Barnosky, C.W. , Grimm, E.C. and Wright, H.E.1987: Towards a post-glacial history of the northern Great Plains: a review of the paleoecologic problems .Annals Carnegie Museum56, 259–273 .
6.
Beijerinck, W.1976:Zadenatlas der Nederlandsche Flora: Ten Behoeve van de Botanie, Palaeontologie, Bodemcultuur en Warenkennis. Amsterdam: Backhuys & Meesters , 316-316 pp.
7.
Birks, H.J.B. , Line, J.M. , Juggins, S. , Stevenson, A.C. and ter Braak, C.J.F.1990: Diatoms and pH reconstruction .Philosophical Transactions of the Royal Society LondonB327, 263–278 .
8.
Budd, A.C.1979.Budd's flora of the Canadian Prairies. Research Branch, Agriculture Canada , Publication 1662.
9.
Burton, E.A. , Haln, T. and Machel, H.G.1992: Magnesium sulfate brine lakes that precipitate dolomite: evidence that Mg2+ dehydration is more important than removal of SO422 inhibition in dolomite formation. In Kharaka, Y.K. and Maest, A.S. editors,Water-Rock Interaction, Rotterdam: Balkema , p. 617–620.
10.
Carvalho, L.R. , Cox, E.J. , Fritz, S.C. , Juggins, S. , Sims, P.A. , Gasse, F. and Battarbee, R.1995: Standardizing the taxonomy of saline lake Cyclotella spp .Diatom Research10, 229–240 .
11.
Cumming, B.F. , Wilson, S.E. , Hall, R.I. and Smol, J.P.1995:Diatoms from British Columbia (Canada) and their relationship to salinity, nutrients, and other limnological variables. Bibliotheca Diatomologica Band 31. Berlin/Stuttgart: Gebrüder Borntraeger , 207-207 pp.
12.
Cumming, B.F. , Wilson, S.E. and Smol, J.P.1993: Paleolimnological potential of chrysophyte cysts and scales and of sponge spicules as indicators of lake salinity .International Journal of Salt Lake Research2, 87–92 .
13.
Curry, B.B.1997: Paleochemistry of Lakes Agassiz and Manitoba based on ostracodes .Canadian Journal of Earth Sciences, 34, 699–708 .
14.
Cywinska, A. and Delorme, L.D.1995:Paleoenvironmental interpretations using fossil freshwater ostracodes from Clearwater Lake core site, Saskatchewan, and Max Lake, Manitoba. National Water Research Institute, Burlington, Ontario , NWRI Contribution 95-1-7, 43-43 pp.
15.
Dean, W.E.1974: Determination of carbonate and organic matter in calcareous sediments and sedimentary rocks by loss on ignition: comparison with other methods .Journal of Sedimentary Petrology44, 242–248 .
16.
Drimmie, R.J. , Heemskerk, A.R. , and Patton, M.E.1992: 13C and 18O in carbonates. Technical Procedure 11.0, Rev. 01. Environmental Isotope Laboratory, Department of Earth Sciences, University of Waterloo , 10-10 pp.
17.
Environment Canada1993:Canadian climate normals 1961–1990 (Volume 2) – Prairie Provinces. Ottawa: Canadian Climate Program .
18.
Folk, R.L. and Land, L.S.1975: Mg/Ca ratio and salinity: two controls over crystallization of dolomite .American Association of Petroleum Geologist Bulletin59, 60–68 .
19.
Fritz, S.C. , Juggins, S. and Battarbee, R. W.1993: Diatom assemblages and ionic characterization of freshwater and saline lakes of the northern Great Plains, North America: a tool for reconstructing past salinity and climate fluctuations .Canadian Journal of Fisheries and Aquatic Sciences50, 1844–1856 .
20.
Fritz, S.C. , Juggins, S. , Battarbee, R.W. , and Engstrom, D.R.1991: Reconstruction of past changes in salinity and climate using a diatom-based transfer function .Nature352, 706–708 .
21.
Goldsmith, J.R. and Graf, D.L.1958: Relation between lattice constants and composition of the Ca-Mg carbonates .American Mineralogist43, 84–101 .
22.
Goulet, H.1983: The genera of holarctic Elaphrini and species of Elaphrus Fabricus (Coleoptera: Carabidae): classification, phylogeny and zoogeography .Quaestiones Entomologicae19, 219–482 .
23.
Hakansson, H. , Hajdu, S. , Snoeijs and Loginova, L.1993:Cyclotella hakanssoniae Wendker (Bacillariophyceae), and its relationship toC. caspia Grunow and other similar brackish waterCyclotella species.Diatom Research 8, 333–347.
24.
Hammer, U.T.1986:Saline lake ecosystems of the world. Dordrecht: Dr W. Junk Publishers , 616-616 pp.
25.
Hardy, R. and Tucker, M.1988: X-ray powder diffraction of sediments. In Tucker, M. , editor,Techniques in sedimentology, Oxford: Blackwell Scientific Publications , 191–228.
26.
Haskell, B.J. , Engstrom, D.R. and Fritz, S.C.1996: Late Quaternary paleohydrology in the North American Great Plains inferred from the geochemistry of endogenic carbonate and fossil ostracodes from Devils Lake, North Dakota, USA .Palaeogeography, Palaeoclimatology, Palaeoecology124, 179–193 .
27.
Hickman, M. and Schweger, C.E.1993: Late glacial-early Holocene paleosalinity in Alberta, Canada – climate implications .Journal of Paleolimnology8, 149–160 .
28.
Hickman, M. and Schweger, C.E.1996: The Late Quaternary paleoenvironmental history of a presently deep freshwater lake in east-central Alberta, Canada and paleoclimatic implications .Palaeogeography, Palaeoclimatology, Palaeoecology123, 161–178 .
29.
Hickman, M. , Schweger, C.E. and Habgood, T.1984: Lake Wabamun, Alta.: a paleoenvironmental study .Canadian Journal of Botany62, 1438–1465 .
30.
Husband, B.C. and Hickman, M.1985: Growth and biomass accumulation ofRuppia occidentalis in three lakes differing in salinity .Canadian Journal of Botany63, 2004–2014 .
31.
Kaczmarska, I. and Rushforth, S.R.1983:The diatom flora of Blue Lake warm spring, Utah, USABibliotheca Diatomologica Band 2. Vaduz: A.R. Gantner Verlag Kommanditgesellschaft , 123-123 pp.
32.
Kantrud, H. A.1990: Sago pondweed (Potamogeton pectinatus L.): a literature review. Washington, DC: United States Department of the Interior, Fish and Wildlife Service , Resource Publication 10, 91-91 pp.
33.
Kantrud, H. A.1991: Wigeongrass (Ruppia maritima L.): a literature review. Washington, DC: United States Department of the Interior, Fish and Wildlife Service , Resource Publication 10, 58-58 pp.
34.
Kennedy, K.A.1994: Early-Holocene geochemical evolution of saline Medicine Lake, South Dakota .Journal of Paleolimnology10, 69–84 .
35.
Klug, H.P. and Alexander, L.E.1974: X-ray diffraction procedures for polycrystalline and amorphous materials. New York: John Wiley , 416-416 pp.
36.
Krammer, K. and Lange-Bertalot, H.1986, 1988, 1991: Bacillariophyceae 1–4. In Ettl, H. , Gärtner, G. , Gerloff, J. , Heynig, H. and Mollenhauer, D. , editors,Susswasserflora von Mitteleuropa, Band 2/1, 2/2, 2/3, 2/4. Stuttgart/New York: Gustav Fischer Verlag .
37.
Laird, K.R. , Fritz, S.C. , Grimm, E.C. and Mueller, P.G.1996: Centuryscale paleoclimatic reconstruction from Moon Lake, a closed-basin lake in the northern Great Plains .Limnology and Oceanography41, 890–902 .
38.
Last, W.M.1989: Continental brines and evaporites of the northern Great Plains of Canada .Sedimentary Geology64, 207–221 .
39.
Last, W.M.1990a: Lacustrine dolomite – an overview of modern, Holocene, and Pleistocene occurrences .Earth Science Reviews27, 221–263 .
40.
Last, W.M.1990b: Paleohydrology and paleochemistry of Ceylon Lake, Canada .Journal of Paleolimnology4, 219–228 .
41.
Last, W.M. 1991: Sedimentology, geochemistry and evolution of saline lakes in the Saskatoon area – excursion guidebook . International Conference on Sedimentary and Paleolimnological Records of Saline Lakes, Saskatoon, Canada, 192-192 pp.
42.
Last, W.M.1993: Geolimnology of Freefight Lake: an unusual hypersaline lake in the Northern Great Plains of western Canada .Sedimentology40, 431–448 .
43.
Last, W.M.1995: Evolution of saline lakes in western Canada. In Campbell , Campbell, C.Lemmen, D.S. and Vance, R.E. , editors,Climate, landscape, and vegetation change in the Canadian prairie provinces, Edmonton: University of Alberta , p. 55–64.
44.
Last, W.M.1996: Lithostratigraphy and mineralogy of Oro Lake, Saskatchewan. The Canadian Association of Geographers Annual Meeting, Program and Abstracts, 130–131.
45.
Last, W.M. and Schweyen, T.H.1983: Sedimentology and geochemistry of saline lakes of the Great Plains .Hydrobiologia105, 245–263 .
46.
Last, W.M. and Slezak, L.A.1986: Paleohydrology, sedimentology, and geochemistry of two deep saline lakes from southern Saskatchewan .Géographie Phys. Quat.11, 5–15 .
47.
Last, W.M. , Teller, J.T. and Forester, R.M.1994: Paleohydrology and paleochemistry of Lake Manitoba, Canada: the isotope and ostracod records .Journal of Paleolimnology12, 269–282 .
48.
Leavitt, P.R. , Vinebrook, R.D. , Hall, R.I. , Wilson, S.E. , Smol, J.P. , Vance, R.E. , and Last, W.M.1998: Multiproxy record of prairie lake response to climatic change and human activity: Clearwater Lake, Saskatchewan. In Lemmen, D.S. and Vance, R.E. , editors, Holocene climate and environmental change in the Palliser Triangle, southern Canadian prairies, Geological Survey of Canada Bulletin, in press.
49.
Lemmen, D.S. , editor 1996:Landscapes of the Palliser Triangle. Guidebook for the Canadian Geomorphological Research Group Field Trip, Canadian Association of Geographers 1996 Annual Meeting, Saskatoon, Saskatchewan .
50.
Lemmen, D.S. , Dyke, L.D. and Edlund, S.A.1993: The Geological Survey of Canada's Integrated Research and Monitoring Area (IRMA) projects: a contribution to Canadian global change research .Journal of Paleolimnology9, 77–83 .
51.
Line, J.M. , ter Braak, C.J.F. and Birks, H.J.B.1994: WACALIB version 3.3 – a computer program to reconstruct environmental variables from fossil assemblages by weighted averaging and to derive sample-specific errors of prediction .Journal of Paleolimnology10, 147–152 .
52.
MacDonald, G.M.1989: Postglacial paleoecology of the subalpine forest – grassland ecotone of southwestern Alberta: new insights on vegetation and climate change in the Canadian Rocky Mountains and adjacent foothills .Palaeogeography, Palaeoclimatology, Palaeoecology73, 155–173 .
53.
Marquart, R.G.1986: mPDSM: Mainframe search/match on an IBM PC . Powder Diffraction1, 34–36 .
54.
Martin, A.C. and Barkley, W.D.1961:Seed identification manual. Berkeley: University of California Press , 220-220 pp.
55.
Montgomery, F.H.1977:Seeds and fruits of plants of eastern Canada and northeastern United States. Toronto: University of Toronto Press , 232-232 pp.
56.
Morrow, D.W.1982: Diagenesis I. Dolomite – part I: the chemistry of dolomitization and dolomite precipitation .Geoscience Canada9, 5–13 .
57.
Morrow, D.W. and Ricketts, B.D.1986: Chemical controls on the precipitation of mineral analogues of dolomite: the sulfate enigma .Geology14, 408–414 .
58.
Morrow, D.W. and Ricketts, B.D.1988: Experimental investigation of sulfate inhibition of dolomite and its mineral analogues. In Shukla, V. and Baker, P.A. , editors,Sedimentology and geochemistry of dolostones, SEPM Special Publication 43, 25–38.
59.
Moss, E.H.1983:The flora of Alberta (second edition). Toronto: University of Toronto Press .
60.
Mott, R.J.1973:Palynological studies in central Saskatchewan. Pollen stratigraphy from lake sediment sequences. Geological Survey of Canada, Paper72–49.
61.
Müller, G.1967:Methods in sedimentary petrography. New York: Hafner Press , 298-298 pp.
62.
Müller, G. , Irion, G. and Förstner, U.1972: Formation and diagenesis of inorganic Ca-Mg carbonates in the lacustrine environment .Naturwissenschaften59, 159–164 .
63.
Radle, N. , Keister, C.M. , and Battarbee, R.W.1989: Diatom, pollen, and geochemical evidence for the paleosalinity of Medicine Lake, S. Dakota, during the Late Wisconsin and early Holocene .Journal of Paleolimnology2, 159–172 .
64.
Risser, P.G. , Birney, E.C. , Blocker, H.D. , May, S.W. , Parton, W.J. and Weins, J.A.1981:The true prairie ecosystem. Stroudsburg, Pennsylvania: Hutchinson Ross Publishing Company , 557-557 pp.
65.
Ritchie, J.C. and De Vries, B.1964: Contributions to the Holocene paleoecology of west central Canada. A late-glacial deposit on the Missouri Coteau .Canadian Journal of Botany42, 677–692 .
66.
Ritchie, J.C. and Harrison, S.P.1993: Vegetation, lake levels, and climate in western Canada during the Holocene. In Wright, H.E., Jr. , Kutzbach, J.E. , Webb, T., III , Ruddiman, W.F. , Street-Perrott, F.A. and Bartlein, P.J. , editors,Global climates since the last glacial maximum, Minneapolis: University of Minnesota Press , 401–414.
67.
Ritchie, J.C. and MacDonald, G.M.1986: The patterns of post-glacial spread of white spruce .Journal of Biogeography13, 527–540 .
68.
Romanek, C.S. , Grossman, E.L. and Morse, J.W.1992: Carbon isotopic fractionation in synthetic aragonite and calcite: effects of temperature and precipitation rate .Geochimica et Cosmochima Acta56, 419–430 .
69.
Rozkowski, A.1969:Chemistry of ground and surface waters in the Moose Mountain area, southern Saskatchewan. Geological Survey of Canada Paper67–69.
70.
Sack, L.A. and Last, W.M.1994: Lithostratigraphy and recent sedimentation history of Little Manitou Lake, Saskatchewan, Canada .Journal of Paleolimnology10, 199–212 .
71.
Schultz, L.G.1964:Quantitative interpretation of mineralogical composition from X-ray and chemical data for the Pierre Shale. United States Geological Survey Professional Paper391-C391-C.
72.
Schweger, C.E. and Hickman, M.1989: Holocene paleohydrology of central Alberta: testing the general-circulation-model climate simulations . Canadian Journal of Earth Sciences26, 1826–1833 .
73.
Schweyen, T.H., 1984.Sedimentology of Waldsea Lake, Saskatchewan.MSc thesis, University of Manitoba, Winnipeg, Canada.
74.
Schweyen, T.H. and Last, W.M.1983: Sedimentology and paleohydrology of Waldsea Lake, Saskatchewan .Canadian Plains Proceedings11, 45–59 .
75.
Shang, Y. and Last, W. M.1998: Mineralogy, lithostratigraphy and inferred geochemical history of North Ingebright Lake, Saskatchewan, Canada. In Lemmen, D.S. and Vance, R.E. , editors,Holocene climate and environmental change in the Palliser Triangle, southern Canadian prairies, Geological Survey of Canada Bulletin, in press.
76.
Slezak, L.A. 1989:Sedimentology of Freefight Lake, Saskatchewan. MSc thesis, University of Manitoba, Winnipeg, Canada.
77.
Smol, J.P.1985: The ratio of diatom frustules to chrysophycean statospores: a useful paleolimnological index .Hydrobiologia123, 199–208 .
78.
Syvitski, J.P.M , LeBlanc, K.W.G. and Asprey, K.W.1991: Interlaboratory, interinstrument calibration experiment. In Syvitski, J.P.M. , editor, Principles, methods, and application of particle size analysis, Cambridge: Cambridge University Press , 174–193.
79.
Tarutani, T. , Clayton, R.N. and Mayeda, T.K.1969: The effect of polymorphism and magnesium substitution on oxygen isotope fractionation between calcium carbonate and water .Geochimica et Cosmochimica Acta33, 987–996 .
80.
Teller, J.T. and Last, W.M.1981: Late Quaternary history of Lake Manitoba, Canada .Quaternary Research16, 97–116 .
81.
Teller, J.T. and Last, W.M.1982: Pedogenic zones in postglacial sediment of Lake Manitoba, Canada .Earth Surface Processes and Landforms7, 367–379 .
82.
ter Braak, C. J. F.1990:Update Notes: CANOCO version 3.10. The Netherlands: Agricultural Mathematics Group , 35-35 pp.
83.
Valero-Garcés, B.L. , Kelts, K. and Ito, E.1995: Oxygen and carbon isotope trends and sedimentological evolution of a meromictic and saline lacustrine system: the Holocene Medicine Lake basin, North American Great Plains, USA .Palaeogeography, Palaeoclimatology, Palaeoecology117, 253–278 .
84.
Vance, R.E.1997: The Geological Survey of Canada's Palliser Triangle Global Change Project: a multidisciplinary geolimnological approach to predicting potential global change impacts on the northern Great Plains . Journal of Paleolimnology17, 3–8 .
85.
Vance, R.E. and Last, W.M.1994: Paleolimnology and global change on the Canadian prairies. In Current Research 1994-B, Geological Survey of Canada, Ottawa , 49–58.
86.
Vance, R.E. and Last, W.M.1996a: Stop 31: Clearwater Lake. In Lemmen, D.S. , editor,Landscapes of the Palliser Triangle, Guidebook for the Canadian Geomorphological Research Group Field Trip, Canadian Association of Geographers 1996 Annual Meeting, Saskatoon, Saskatchewan , 78–79.
87.
Vance, R.E. and Last, W.M.1996b: Stop 4: Oro Lake. In Lemmen, D.S. , editor,Landscapes of the Palliser Triangle, Guidebook for the Canadian Geomorphological Research Group Field Trip, Canadian Association of Geographers 1996 Annual Meeting, Saskatoon, Saskatchewan , 26–27.
88.
Vance, R.E. , Beaudoin, A.B. and Luckman, B. H.1995: The paleoecological record of 6ka BP climate in the Canadian prairie provinces .Géographie Phys. Quat.49, 81–98 .
89.
Van Stempvoort, D.R. , Edwards, T.W.D. , Evans, M.S. and Last, W.M.1993: Paleohydrology and paleoclimate records in a saline prairie lake core: mineral, isotope and organic indicators .Journal of Paleolimnology8, 135–147 .
90.
Warren, J.W.1989:Evaporite Sedimentology. Englewood Cliffs, NJ: Prentice Hall , 285-285 pp.
91.
Wilson, S.E. , Cumming, B.F. and Smol, J.P.1996: Assessing the reliability of salinity inference models from diatom assemblages: An examination of a 219 lake data set from western North America .Canadian Journal of Fisheries and Aquatic Sciences53, 1580–1594 .
92.
Winter, T.C.1992: A physiographic and climatic framework for hydrologic studies of wetlands. In Roberts, R.D. , and Bothwell, M.L. , editors,Aquatic ecosytems in semi-arid regions: implications for resource management, N.H.R.I. Symposium Series 7, Environment Canada, Saskatoon, Saskatchewan , 127–148.
93.
Winter, T.C.1995: Hydrological processes and the water budget of lakes. In Lerman, A. , Imboden, D.M. and Gat, J.R. , editors,Physics and chemistry of lakes. New York: Springer Verlag , 37–62.
94.
Xia, J.Haskell, B.J. , Engstrom, D.R. and Ito, E.1997: Holocene climate reconstructions from tandem trace-element and stable-isotope composition of ostracodes from Coldwater Lake, North Dakota, USA .Journal of Paleolimnology17, 85–100 .
95.
Yansa, C.H. 1995: An early postglacial record of vegetation change in southern Saskatchewan, Canada, MSc thesis, University of Saskatchewan.
