Holocene water levels at Rice Lake, Ontario, Canada

Sediment, pollen and plant-macrofossil evidence

Datos Bibliográficos

ID12265773
AutoresZicheng Yu (0000-0003-2358-2712, Department of Botany, Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada and Department of Botany, University of Toronto, Toronto, Ontario M5S 1A1, Canada, autor de correspondencia), John H Mcandrews (Department of Botany, Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada and Department of Botany, University of Toronto, Toronto, Ontario M5S 1A1, Canada, Department of Geology, University of Toronto, Toronto, Ontario M5S 1A1, Canada)
Año1994
Volumen4
Número2
Páginas141-152
Fecha de publicación1994-06-01
Peer ReviewedSí
Open AccessSí
TipoARTICLE
RevistaThe Holocene (JOURNAL)
Identificadores de la revistaISSN: 0959-6836 • E-ISSN: 1477-0911
EditorialSAGE Publishing (PUBLISHER • US)
DOI10.1177/095968369400400204
OpenAlexW2047762817
IdiomaEN
Citas recibidas13
Referencias citadas28

Four cores taken along a transect from the western basin and four cores from the middle basin of Rice Lake, Ontario, provide evidence for shoreline transgression during the early Holocene, for low water levels during the mid-Holocene, and for abrupt rise of the lake levels due to dam building in AD 1838. The transition from detritus mud to the overlying marl, spanning from ca. 10000 to 8600 BP, indicates flooding of a wetland by a lake; this flooding is supported by plant-macrofossil succession from Larix, Scirpus, and Carex to Najas flexilis. The transgression was due to isostatic tilt after deglaciation, which raised the eastern outlet sill of the lake and caused the lake water to rise and flood westward. A sediment hiatus between the marl and the overlying gyttja (between 6000 and 4000-3000 BP) across the lake basin, supported by the bracketing radiocarbon dates and missing regional pollen zones, indicates low water level caused by a dry/warm climate. Regional palaeoclimatic estimates from pollen-climate transfer functions indicate that the mid-Holocene mean July temperatures were about 1°C higher and annual precipitations about 10% less than before or after. Subsequent rise of the lake level after the hiatus was a combination of cooling climate and continued isostatic tilt

Deglaciation · Geography · Geomorphology · Holocene · Macrofossil · Marine transgression · Marl · Physical geography · Preboreal · Radiocarbon dating · Structural basin · Younger Dryas · Geology and Paleoclimatology Research · Groundwater and Isotope Geochemistry · Hydrology and Watershed Management Studies · Geology · Oceanography · Paleontology