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Wisconsinan History of the Hudson-Champlain Lobe

By
G. Gordon Connally
G. Gordon Connally
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Leslie A. Sirkin
Leslie A. Sirkin
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Published:
January 01, 1973

The Hudson-Champlain Valley is the only continuous lowland between the classic glacial areas of the Midwest and coastal New England, and presumably it contains the most complete Wisconsinan record east of the Erie-Ontario Lobe. A date of 26,800 yrs B.P. on intraglacial peat in New Jersey establishes a maximum age for the Woodfordian advance of the Hudson-Champlain Lobe.

On western Long Island, deposition of the Ronkonkoma and Harbor Hill Moraines was followed by readvance and deposition of the Roslyn Till, and finally, by a stillstand on the north shore. Deglaciation from the Ronkonkoma Moraine began about 17,000 yrs B.P. In the Wallkill Valley, the southwestern physiographic continuation of the Hudson Valley, the terminal Woodfordian position is the Culvers Gap Moraine. Recessional positions are recorded at the Augusta, Sussex, Pellets Island, and Wallkill Moraines. The age of the Wallkill Moraine is established at 15,000 yrs B.P. The Woodfordian terminus of the Hudson-Champlain Lobe is traced northward from the Denville re-entrant in the Terminal Moraine in New Jersey, rather than westward, connecting the Ronkonko-ma and Culvers Gap Moraines.

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Contents

GSA Memoirs

The Wisconsinan Stage

Robert F. Black
Robert F. Black
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Richard P. Goldthwait
Richard P. Goldthwait
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H. B. Willman
H. B. Willman
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Geological Society of America
Volume
136
ISBN print:
9780813711362
Publication date:
January 01, 1973

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