Late Wisconsinan ice sheet flow across northern and central Vermont, USA

Wright, Stephen F.

doi:10.1016/j.quascirev.2015.10.018

Cited by 4 publications

(6 citation statements)

References 10 publications

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“…The show that as the LIS thinned and retreated the ice became topographically confined and ice flow patterns shifted to follow the orientation of the valleys in which they were constrained. This provides evidence supporting the second hypothesis by Wright (2015), that cross cutting striations are caused by topographic constraints and not by ice sheet readvance.…”

Section: 3: Ice Flow Patternssupporting

confidence: 82%

“…Subsequent work in the region provided detailed mapping of striations to depict higher resolution ice flow patterns (Billings, 1949). Zones of cross-cutting striations have also been noted throughout Vermont (Doll et al, 1970;Wright, 2015), all in areas of high topographic relief. Two hypotheses were developed by Wright (2015) to explain these localized ice flow changes.…”

Section: 5: Lis Flow Patternsmentioning

confidence: 91%

“…Regional ice flow in New England was generally south-southeast (Antevs, 1922), however localized flow patterns appear to vary drastically across the region (Wright, 2015). Several sites display zones of cross-cutting striations which indicate two different ice flow patterns at the same location.…”

Section: 5: Lis Flow Patternsmentioning

confidence: 96%

“…Striations and other ice flow indicators provide a unique insight into the flow patterns of the ice sheets that created them. Numerous studies have examined ice flow patterns throughout New England to determine both regional and localized ice flow patterns for the LIS during and after the LGM (Hitchcock, 1878;Wheelock, 1873;Goldthwait et al, 1951;Wright, 2015).…”

Section: 5: Lis Flow Patternsmentioning

confidence: 99%

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Developing a Chronology for Thinning of the Laurentide Ice Sheet in New Hampshire During the Last Deglaciation

Hodgdon¹

2016

Geological Society of America Abstracts With Programs

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Well-constrained ages for the retreat of the Laurentide Ice Sheet (LIS) have been developed at key sites throughout New England, providing a framework for the deglacial history of the region. Previous work has focused primarily on documenting retreat of the ice sheet margin, but few studies have attempted to reconstruct changes in ice sheet geometry and flow patterns during its recession. This study provides the first direct age control on the thinning of the LIS in central and southern New Hampshire during the last deglaciation. In situ cosmogenic 10 Be exposure ages were developed from four glaciated summits, in order to determine when

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Section: 3: Ice Flow Patternssupporting

confidence: 82%

Section: 5: Lis Flow Patternsmentioning

confidence: 91%

Section: 5: Lis Flow Patternsmentioning

confidence: 96%

Section: 5: Lis Flow Patternsmentioning

confidence: 99%

See 2 more Smart Citations

Developing a Chronology for Thinning of the Laurentide Ice Sheet in New Hampshire During the Last Deglaciation

Hodgdon¹

2016

Geological Society of America Abstracts With Programs

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“…Because a proglacial lake presumably filled the north-draining valley in front of the advancing ice margin (Fig. 8B), as Glacial Lake Vermont did during retreat (Chapman, 1937), accelerated ice advance may have been facilitated by subglacial deformation of fine-grained water-saturated sediment (van der Meer et al, 2003) or ice streaming as has been documented during ice retreat (Wright, 2015). Uncertainty over when the ice reached the terminal moraine position complicates calculation of an Figure 7.…”

Section: Discussionmentioning

confidence: 99%

Cave sediments constrain the latest Pleistocene advance of the Laurentide Ice Sheet in the Champlain Valley, Vermont, USA

Munroe

Perzan

Amidon

2016

J Quaternary Science

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Optically stimulated luminescence (OSL) and infrared stimulated luminescence (IRSL) dating were applied to cave sediments that were protected from the Marine Isotope Stage 2 (MIS‐2) advance of the Laurentide Ice Sheet (LIS) in the Champlain Valley of western Vermont. Evidence indicates that these sediments were derived from a subaerial landscape, requiring that the ice margin was north of the Champlain Valley when they were deposited. A basal sandy gravel was deposited during MIS‐4 (∼68 ka), sand near the middle of the composite stratigraphy was deposited during MIS‐3 (∼55 ka), and a layer of coarse sand in the stratigraphically highest position was deposited at the onset of MIS‐2 (∼35 ka). The youngest age constrains advance of the LIS south of the international border early in MIS‐2, and is combined with other available evidence to constrain ice advance rates over the 12 000 years leading up to the Last Glacial Maximum. Rates estimated from limiting ages were relatively slow (25 ma−1) as the ice ascended the adverse slope out of the St. Lawrence Lowland, increased as the margin advanced through the Champlain Valley, perhaps aided by subglacial bed deformation or ice streaming, and were fastest (∼100 ma−1) as the margin approached the terminal moraine position.

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Analysis of multiple cosmogenic nuclides constrains Laurentide Ice Sheet history and process on Mt. Mansfield, Vermont's highest peak

Corbett

Bierman

Wright

et al. 2019

Quaternary Science Reviews

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Late Wisconsinan ice sheet flow across northern and central Vermont, USA

Cited by 4 publications

References 10 publications

Developing a Chronology for Thinning of the Laurentide Ice Sheet in New Hampshire During the Last Deglaciation

Developing a Chronology for Thinning of the Laurentide Ice Sheet in New Hampshire During the Last Deglaciation

Cave sediments constrain the latest Pleistocene advance of the Laurentide Ice Sheet in the Champlain Valley, Vermont, USA

Analysis of multiple cosmogenic nuclides constrains Laurentide Ice Sheet history and process on Mt. Mansfield, Vermont's highest peak

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