Late Pleistocene and recent deposits in the Connecticut Valley, Massachusetts

Jahns, Richard H.; Willard, Max E.

doi:10.2475/ajs.240.3.161

Cited by 24 publications

(20 citation statements)

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“…1) northward into New Hampshire. Lougee maintained that the spillway for the lake was near Middletown, despite recognition of another more viable spillway at New Britain (Loughlin, 1905;Flint, 1933;Jahns and Willard, 1942;Fig. 1).…”

Section: Glacial Lake Hitchcockmentioning

confidence: 99%

“…Leveling surveys by Jahns and Willard (1942) in Massachusetts, that have been greatly refined and expanded to northern New Hampshire and Vermont (Koteff and Larsen, 1989), indicate that the level of Lake Hitchcock was controlled by the New Britain channel in Connecticut. Koteff and Larsen also identified deltas defining a flat, tilted (0.9 m/km, up at 339°) water plane for Lake Hitchcock that extends northward to at least Woodsville and Littleton (Fig.…”

Section: Modern Studies Of Isostasy and Lake Hitchcock Drainagementioning

confidence: 99%

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Varve, paleomagnetic, and 14 C Chronologies for late Pleistocene events in New Hampshire and Vermont (U.S.A.)

Ridge¹,

Bensonen²,

Brochu³

et al. 2002

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A deglacial chronology for northern New England has been formulated using an atmospheric 14 C calibration of the New England Varve Chronology and paleomagnetic records. This 14 C chronology is based on 14 C ages from macrofossils of non-aquatic plants and is about 1 500 yr younger than existing chronologies that are based primarily on 14 C ages of bulk organic samples. The lower and upper Connecticut Valley varve sequences of Ernst Antevs (NE varves 2 701-6 352 and 6 601-8 500) overlap (lower 6 012 = upper 6 601) based on their crudely matching varve records and their similar paleomagnetic records. Three 14 C ages at Canoe Brook, Vermont (NE varve 6 150 = 12.3 14C ka) calibrate the lower Con necticut Valley sequence. New AMS and con ventional 14 C ages on woody twigs from Newbury, Vermont calibrate the upper se quence from 11.6-10.4 14 C ka (NE varves 7 440-8 660) and are consistent with the over lapping varve and paleomagnetic records, and the Canoe Brook 14 C ages. Deglaciation of the Connecticut Valley in southern Vermont began at 12.6 14 C ka (15.2 cal ka) and the Littleton-Bethlehem Readvance in northern New Hampshire and Vermont reached its maximum at11.9-11.8 14 C ka (14.0-13.9 cal ka) followed by recession of ice into Québec at about 11.5 14 C ka (13.4 cal ka). A lake persisted in the upper Connecticut Valley until at least 10.4 14 C ka (12.3 cal ka) and may have been seen by the first humans in the area.

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Section: Glacial Lake Hitchcockmentioning

confidence: 99%

Section: Modern Studies Of Isostasy and Lake Hitchcock Drainagementioning

confidence: 99%

Varve, paleomagnetic, and 14 C Chronologies for late Pleistocene events in New Hampshire and Vermont (U.S.A.)

Ridge¹,

Bensonen²,

Brochu³

et al. 2002

gpq

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show abstract

“…Much evidence (Emerson, 1898b;Jahns, 1966 andJahns and Willard, 1942;Foose and Cunningham, 1968;Saines, 1971) indicates that the Connecticut River in Massachusetts is not flowing in the same channel today that it did immediately prior to advance of the last ice sheet. However, there is no evidence suggesting that the Connecticut River and its tributaries did not occupy their water gaps prior to the last glaciation.…”

Section: Chapman Made a Detailed Study Of Five Localities Inmentioning

confidence: 99%

“…Coarse-grained lacustrine sediments, gravel and sand, are Associated with shoreline and deltaic deposits. Shoreline deposits are difficult to recognize and probably would not be identified specifically except for previous work in other areas (Jahns and Willard, 1942;Jahns, 1951;Hartshorn and Colton, 1967). Once the concepts of Lake Hitchcock and its tilted water Apples, (2) sinusoidal ripples (Jopling and Walker, 1968), (3) or backset ripples, and (4) foreset beds ( fig.…”

mentioning

confidence: 99%

Surficial geology of the Mount Tom quadrangle, Massachusetts

Larsen¹

1972

Open-File Report

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“…If there had been no postglacial tilt, the lakeshores and deltas graded to the same water plane from Rocky Hill to at least New Hampshire would be horizontal. However, after ice left the area, and presumably after the lake was drained, postglacial upwarp or tilt of 4.2 feet per mile (Jahns and Willard, 1942) took place. Thus, once-level shorelines, such as those found in the Mt.…”

Section: Surficial Geologymentioning

confidence: 99%

Geologic map of the Springfield South quadrangle, Hampden County, Massachusetts, and Hartford and Tolland Counties, Connecticut

Hartshorn¹,

Koteff²

1967

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Late Pleistocene and recent deposits in the Connecticut Valley, Massachusetts

Cited by 24 publications

References 0 publications

Varve, paleomagnetic, and 14 C Chronologies for late Pleistocene events in New Hampshire and Vermont (U.S.A.)

Varve, paleomagnetic, and 14 C Chronologies for late Pleistocene events in New Hampshire and Vermont (U.S.A.)

Surficial geology of the Mount Tom quadrangle, Massachusetts

Geologic map of the Springfield South quadrangle, Hampden County, Massachusetts, and Hartford and Tolland Counties, Connecticut

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