Influence of late Pleistocene glaciations on the hydrogeology of the continental shelf offshore Massachusetts, USA

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dc.citation.journalTitleGeochemistry, Geophysics, Geosystemsen_US
dc.contributor.authorSiegel, Jacoben_US
dc.contributor.authorPerson, Marken_US
dc.contributor.authorDugan, Brandonen_US
dc.contributor.authorCohen, Denisen_US
dc.contributor.authorLizarralde, Danielen_US
dc.contributor.authorGable, Carlen_US
dc.date.accessioned2015-01-08T14:55:02Zen_US
dc.date.available2015-01-08T14:55:02Zen_US
dc.date.issued2014en_US
dc.description.abstractMultiple late Pleistocene glaciations that extended onto the continental shelf offshore Massachusetts, USA, may have emplaced as much as 100 km3 of freshwater (salinity <5 ppt) in continental shelf sediments. To estimate the volume and extent of offshore freshwater, we developed a three-dimensional, variable-density model that couples fluid flow and heat and solute transport for the continental shelf offshore Massachusetts. The stratigraphy for our model is based on high-resolution, multichannel seismic data. The model incorporates the last 3 Ma of climate history by prescribing boundary conditions of sea level change and ice sheet extent and thickness. We incorporate new estimates of the maximum extent of a late Pleistocene ice sheet to near the shelf-slope break. Model results indicate that this late Pleistocene ice sheet was responsible for much of the emplaced freshwater. We predict that the current freshwater distribution may reach depths up to 500 meters below sea level and up to 30 km beyond Martha's Vineyard. The freshwater distribution is strongly dependent on the three-dimensional stratigraphy and ice sheet history. Our predictions improve our understanding of the distribution of offshore freshwater, a potential nonrenewable resource for coastal communities along recently glaciated margins.en_US
dc.identifier.citationSiegel, Jacob, Person, Mark, Dugan, Brandon, et al.. "Influence of late Pleistocene glaciations on the hydrogeology of the continental shelf offshore Massachusetts, USA." <i>Geochemistry, Geophysics, Geosystems,</i> (2014) American Geophysical Union: http://dx.doi.org/10.1002/2014GC005569.en_US
dc.identifier.doihttp://dx.doi.org/10.1002/2014GC005569en_US
dc.identifier.urihttps://hdl.handle.net/1911/78904en_US
dc.language.isoengen_US
dc.publisherAmerican Geophysical Unionen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.subject.keywordPleistoceneen_US
dc.subject.keywordhydrogeologyen_US
dc.subject.keywordcontinental shelfen_US
dc.subject.keywordglaciationen_US
dc.subject.keywordfreshwater resourcesen_US
dc.titleInfluence of late Pleistocene glaciations on the hydrogeology of the continental shelf offshore Massachusetts, USAen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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