A 16,000 year pollen record from Lake Wabamun, Alberta, Canada

Holloway, Richard; Bryant, Vaughn; Valastro, Salvatore

doi:10.1080/01916122.1981.9989225

Cited by 21 publications

(5 citation statements)

References 14 publications

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“…Climatic warming about 9520 * 1430 years BP (TX-2553) led to boreal forest vegetation and eventually aspen grove vegetation similar to that existing today in the area. Despite the assurances of the authors (Holloway et al 1981) that possible Tertiaryaged carbon and carbonates from nearby lignite bedrock were apparently removed during preparation of the sediment samples for radiocarbon dating, the oldest age in particular should be used with some caution.…”

Section: Previous Palynological Studiesmentioning

confidence: 99%

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An 18 000 year palynological record from the southern Alberta segment of the classical Wisconsinan "Ice-free Corridor"

Mott¹,

Jackson²

1982

Can. J. Earth Sci.

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Radiocarbon dates of 18 300 ± 380 years BP (GSC-2668) and 18 400 ± 1090 years BP (GSC-2670) on moss fragments from the clay near the base of a core from Chalmers Bog, Alberta indicate that the classical Wisconsinan "Ice-free Corridor" was in existence in the foothills of southern Alberta by this time. Palynological studies show sparse, herbaceous, tundra-like vegetation probably prevailed at this time in the area surrounding the small lake formed in the abandoned glacial spillway. Later, shrubs became more prominent to form a shrub tundra environment. Sometime before 8220 years BP (GSC-2851) trees began to invade the area and the Pinus contorta dominated coniferous forest extant in the area today began to form. Bog and fen vegetation invaded the shallow lake basin about this time as well to form the bog that occupies the basin to the present day.

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Section: Previous Palynological Studiesmentioning

confidence: 99%

“…Radiocarbon dates indicating ice-free conditions during the maximum of the classical Wisconsin Glaciation (ca. 25 000-15 000 BP) are rare as are paleoclimatic data for this period (White et Ritchie 1980;Holloway et al. 1981).…”

Section: Introductionmentioning

confidence: 99%

An 18 000 year palynological record from the southern Alberta segment of the classical Wisconsinan "Ice-free Corridor"

Mott¹,

Jackson²

1982

Can. J. Earth Sci.

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“…Hickman et al (1984), Holloway et al (1981), and Fritz & Krouse (1973) supply some of the most detailed analyses of a postglacial lacustrine sequence in western Canada for Lake Wabamun. Cores from this 82 km 2 closed basin lake located west of Edmonton have been examined for major and nutrient elements, organic pigment, diatom and pollen stratigraphy, and 180/160 content.…”

Section: Synopsis Of Paleolimnological Studiesmentioning

confidence: 99%

The salt lakes of western Canada: A paleolimnological overview

Last

Slezak

1988

Hydrobiologia

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The northern Great Plains of western Canada contain many saline and hypersaline lakes. Deadmoose and Waldsea Lakes in south-central Saskatchewan are meromictic, with saline Mg-Na-SO4-Cl waters overlying denser brines of similar composition. Mineralogical, chemical, palynological, and stable isotope analyses of the sediments in the Waldsea basin indicate the lake was much shallower about 4000 years ago in response to a warmer and drier climate. Since that time water levels have generally increased in the basin giving rise to higher organic productivity and greater inorganic carbonate precipitation. Within this overall trend there is also evidence of several lower water stages during the last 3 000 years. The stratigraphy preserved in the Deadmoose basin suggests considerably lower water levels about 1000 years ago.Ceylon Lake, located about 350 km south of the Waldsea-Deadmoose area, is presently a shallow, saline playa. The basin originated about 15000 years ago as a glacial meltwater spillway. Stratigraphic variation in evaporite and carbonate mineralogy shows that the basin evolved from a relatively low salinity, riverine lake to one in which initially Na-rich and then Mg-rich hypersaline brines dominated.Lake Manitoba is a large, hyposaline lake located in the eastern Great Plains about 700 km from the Deadmoose-Waldsea area. Stable oxygen and carbon isotope analyses of the endogenic carbonates in the basin indicate gradually increasing levels of organic productivity but decreasing temperatures between 9 000 and 5 000 years B.P. Between about 4000 and 2000 years ago the isotope ratios suggest relatively stable temperatures followed by a strong decrease during the most recent 2000 year period.

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“…1905Hutchinson et al, 1981Van Denburgh, 1975Bedwell, 1973Gehr and Newman, 1978Wendorf and Hester, 1975Reeves, 1966Wendorf and Hester, 1975Haynes, 1975Wendorf and Hester, 1975Wendorf and Hester, 1975Wendorf and Hester, 1975Broecker and Kaufman, 1965Winkler and Swain, pers. com Vance et al, 1983Hickman and Klarer, 1981Schweger era/., 1983 Vance ef a/., Holloway et al. 1981MacDonald.…”

Section: Spatial Structure Of Lake Levelsmentioning

confidence: 99%

Variations in Lake Levels during the Holocene in North America: An Indicator of Changes in Atmospheric Circulation Patterns

Harrison¹,

Metcalfe²

2007

gpq

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Fluctuations in the extent of closed lakes provide a detailed record of regional and continental variations in mean annual water budget. The temporal sequence of hydrological fluctuations during the Holocene in North America has been reconstructed using information from the Oxford Lake-Level Data Bank. This data base includes 67 basins from the Americas north of the equator. Maps of lake status, an index of relative depth, are presented for the period 10,000 to 0 yr BP. The early Holocene was characterised by increasingly arid conditions, which led to widespread low lake levels in the mid-latitudes by 9,000 yr BP. By 6,000 yr BP this zone of low lakes extended from 32o to 51oN. Many of the features of the present day lake-level pattern, particularly high lake levels north of 46oN and along the eastern seaboard, were established by 3.000 yr BP. Four distinctive regional patterns of lake behaviour through time are apparent. Histograms of lake status from 20,000 to 0 yr BP are presented for each of these regions. They illustrate the temporal patterns of lake-level fluctuations on a time scale of 103 — 104 yr. Changes in lake status over North America are interpreted as indicating displacements in major features of the general circulation, specifically the zonal Westerlies and the Equatorial Trough, as reflected by changes in air mass trajectories and hence the position of air mass boundaries over the continent.Les fluctuations de superficie enregistrées dans les lacs fermés fournissent des données détaillées quant aux variations, aux échelles régionale et continentale, du bilan annuel moyen de l'eau. On a reconstitué, en Amérique du Nord, la chronologie des fluctuations survenues à l'Holocène, en se fondant sur les données fournies par le Oxford Lake-Level Data Bank. Cette banque de données renseigne sur 67 bassins lacustres, situés en Amérique au nord de l'équateur. On présente ici des cartes illustrant les niveaux lacustres entre 10 000 et 0 ans BP. L'Holocène inférieur se caractérisait par une progression de l'aridité qui a entraîné un abaissement général du niveau des lacs situés sous les moyennes latitudes, environ 9000 ans BP. Environ 6000 ans BP. cette zone passait du 32o de latitude nord au 51o. Un grand nombre de particularités qui caractérisent aujourd'hui les niveaux lacustres, notamment les hauts niveaux qu'on observe au nord du 46o N et le long de la côte est, étaient déjà acquises vers 3000 ans BP. Quatre types d'évolution générale se dégagent au cours des millénaires. Par ailleurs, on présente des histogrammes illustrant les niveaux lacustres selon une échelle temporelle de 103 — 104 ans. On considère que les changements qu'ont connu, en Amérique du Nord, les niveaux lacustres révèlent qu'il y a eu déplacement des composantes principales de la circulation atmosphérique générale, surtout en ce qui a trait aux vents d'ouest et à la dépression équatoriale. Ils se sont traduits par des modifications de la trajectoire des masses d'air, ce qui explique la position des limites de masses d'air sur le continen...

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A 16,000 year pollen record from Lake Wabamun, Alberta, Canada

Cited by 21 publications

References 14 publications

An 18 000 year palynological record from the southern Alberta segment of the classical Wisconsinan "Ice-free Corridor"

An 18 000 year palynological record from the southern Alberta segment of the classical Wisconsinan "Ice-free Corridor"

The salt lakes of western Canada: A paleolimnological overview

Variations in Lake Levels during the Holocene in North America: An Indicator of Changes in Atmospheric Circulation Patterns

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