Holocene paleohydrology from Lake of the Woods and Shoal Lake cores using ostracodes, thecamoebians and sediment properties

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dc.contributor.authorMellors, Trevor
dc.contributor.examiningcommitteeLast, William (Geological Sciences) Buhay, William (University of Winnipeg)en
dc.contributor.supervisorTeller, James (Geological Sciences)en
dc.date.accessioned2010-09-07T16:37:34Z
dc.date.available2010-09-07T16:37:34Z
dc.date.issued2010-09-07T16:37:34Z
dc.degree.disciplineGeological Sciencesen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractTen sediment cores (2.0-8.5 m long) from various locations in Lake of the Woods (LOTWs) and Shoal Lake (SL) were recovered in August 2006, using a Kullenberg piston corer. From the study of the macrofossils (primarily ostracodes and thecamoebians) and the sediments in six processed cores, variations in paleoconditions were observed both spatially and temporally, and the timing of these changes were identified in over 10,000 years of postglacial history. Ostracodes disappeared from the LOTWs record from about 9000 to 7600 calendar years before present (BP) (about 5800 in SL), after LOTWs became isolated from glacial Lake Agassiz. Thecamoebians appeared in many cores around 2000 calendar years BP, with the earliest appearance at 9200. Buried paleosols in three cores indicate portions of the lake dried on several occasions during the Hypsithermal, perhaps indicating the region’s future climate response. One core contained a pink clay bed indicative of the Marquette readvance about 11,300 years (BP), and the subsequent input of water from the Superior basin.en
dc.description.noteOctober 2010en
dc.format.extent21503539 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1993/4098
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectOstracodesen
dc.subjectThecamoebiansen
dc.subjectIsostatic Rebounden
dc.subjectClimate Instabilityen
dc.subjectLake of the Woodsen
dc.subjectShoal Lakeen
dc.subjectHoloceneen
dc.subjectHypsithermalen
dc.subjectLaurentide Ice Sheeten
dc.subjectLake Agassizen
dc.subjectMarquette Readvanceen
dc.subjectCharcoalen
dc.subjectPaleohydrologyen
dc.subjectSedimentsen
dc.titleHolocene paleohydrology from Lake of the Woods and Shoal Lake cores using ostracodes, thecamoebians and sediment propertiesen
dc.typemaster thesisen_US
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