Provenance and deposition of glacial Lake Missoula lacustrine and flood sediments determined from rock magnetic properties

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dc.contributor.authorHanson, Michelle A.
dc.contributor.authorEnkin, Randolph J.
dc.contributor.authorBarendregt, René W.
dc.contributor.authorClague, John J.
dc.date.accessioned2015-06-12T19:57:26Z
dc.date.available2015-06-12T19:57:26Z
dc.date.issued2015
dc.descriptionSherpa Romeo green journal. Permission to archive accepted author manuscript.en_US
dc.description.abstractRepeated outburst flooding from glacial LakeMissoula,Montana, affected large areas of Washington duringMarine Oxygen Isotope Stage 2 (29–14 ka).We present the first high-resolution rock magnetic results from two sites that are critical to interpreting these outburst floods and that provide evidence of sediment provenance: glacial Lake Missoula, the source of the floods; and glacial Lake Columbia, where floodwaters interrupted sedimentation. Magnetic carriers in glacial LakeMissoula varves are dominated by hematite,whereas those in outburst flood sediments and glacial Lake Columbia sediments aremainly magnetite and titano-magnetite. Stratigraphic variation of magnetic parameters is consistent with changes in lithology. Importantly, magnetic properties highlight depositional processes in the flood sediments that are not evident in the field. In glacial Lake Columbia, hematite is present in fine silt and clay deposited near the end of each flood as fine sediment settled out of the water column. This signal is only present at the end of the floods because the hematite is concentrated in the finer-grained sediment transported from the floor of glacial LakeMissoula, the only possible source of hematite, ~240 km away.en_US
dc.description.peer-reviewYesen_US
dc.identifier.citationHanson, M.A., Enkin, R.J., Barendregt, R.W. & Clague, J.J. (2015). Provenance and deposition of glacial Lake Missoula lacustrine and flood sediments determined from rock magnetic properties. Quaternary Research, 83, 166-177. DOI: https://doi.org/10.1016/j.yqres.2014.09.005en_US
dc.identifier.urihttps://hdl.handle.net/10133/3701
dc.language.isoen_CAen_US
dc.publisherElsevieren_US
dc.publisher.departmentDepartment of Geographyen_US
dc.publisher.facultyArts and Scienceen_US
dc.publisher.institutionSaskatchewan Geological Surveyen_US
dc.publisher.institutionGeological Survey of Canadaen_US
dc.publisher.institutionUniversity of Lethbridgeen_US
dc.publisher.institutionSimon Fraser Universityen_US
dc.publisher.urlhttps://doi.org/10.1016/j.yqres.2014.09.005
dc.subjectGlacial Lake Missoulaen_US
dc.subjectGlacial Lake Columbiaen_US
dc.subjectRock magnetic propertiesen_US
dc.subjectGlacial outburst floodsen_US
dc.subjectMagnetic hysteresisen_US
dc.subjectThermomagnetic susceptibilityen_US
dc.titleProvenance and deposition of glacial Lake Missoula lacustrine and flood sediments determined from rock magnetic propertiesen_US
dc.typeArticleen_US
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