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dc.contributor.author Roberts, Helen M.
dc.contributor.author Muhs, Daniel R.
dc.contributor.author Wintle, Ann G.
dc.contributor.author Duller, Geoff A. T.
dc.contributor.author Bettis III, E. Arthur
dc.date.accessioned 2008-12-16T10:13:05Z
dc.date.available 2008-12-16T10:13:05Z
dc.date.issued 2003-05
dc.identifier.citation Roberts , H M , Muhs , D R , Wintle , A G , Duller , G A T & Bettis III , E A 2003 , ' Unprecedented last-glacial mass accumulation rates determined by luminescence dating of loess from western Nebraska ' Quaternary Research , vol 59 , no. 3 , pp. 411-419 . , 10.1016/S0033-5894(03)00040-1 en
dc.identifier.issn 0033-5894
dc.identifier.other PURE: 94907
dc.identifier.other dspace: 2160/1679
dc.identifier.uri http://hdl.handle.net/2160/1679
dc.description Roberts, H. M., Muhs, D. R., Wintle, A. G., Duller, G. A. T., & Bettis III, E. A. (2003). Unprecedented last-glacial mass accumulation rates determined by luminescence dating of loess from western Nebraska. Quaternary Research, 59(3), 411-419. RAE2008 en
dc.description.abstract A high-resolution chronology for Peoria (last glacial period) Loess from three sites in Nebraska, midcontinental North America, is determined by applying optically stimulated luminescence (OSL) dating to 35–50 μm quartz. At Bignell Hill, Nebraska, an OSL age of 25,000 yr near the contact of Peoria Loess with the underlying Gilman Canyon Formation shows that dust accumulation occurred early during the last glacial maximum (LGM), whereas at Devil’s Den and Eustis, Nebraska, basal OSL ages are significantly younger (18,000 and 21,000 yr, respectively). At all three localities, dust accumulation ended at some time after 14,000 yr ago. Mass accumulation rates (MARs) for western Nebraska, calculated using the OSL ages, are extremely high from 18,000 to 14,000 yr—much higher than those calculated for any other pre-Holocene location worldwide. These unprecedented MARs coincide with the timing of a mismatch between paleoenvironmental evidence from central North America, and the paleoclimate simulations from atmospheric global circulation models (AGCMs). We infer that the high atmospheric dust loading implied by these MARs may have played an important role, through radiative forcing, in maintaining a colder-than-present climate over central North America for several thousand years after summer insolation exceeded present-day values. en
dc.format.extent 9 en
dc.language.iso eng
dc.relation.ispartof Quaternary Research en
dc.title Unprecedented last-glacial mass accumulation rates determined by luminescence dating of loess from western Nebraska en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1016/S0033-5894(03)00040-1
dc.contributor.institution Quaternary Environmental Change Group en
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.description.status Peer reviewed en


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