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Late Wisconsinan Glaciation Models of Northern Maine and Adjacent Canada

Published online by Cambridge University Press:  20 January 2017

Andrew N. Genes ,
William A. Newman  and
Thomas B. Brewer
Andrew N. Genes
Affiliation:
Department of Regional Studies, Boston State College, Boston, Massachusetts 02115
William A. Newman
Affiliation:
Department of Earth Sciences, Northeastern University, Boston, Massachusetts 02115
Thomas B. Brewer
Affiliation:
Department of Regional Studies, Boston State College, Boston, Massachusetts 02115
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Abstract

Surficial stratigraphic units of Aroostook County, Maine, have been mapped and formal stratigraphic names for these units are proposed. Evidence exists for at least two distinct glacial phases which are represented by three tills. Two of these tills were deposited penecontemporaneously either as the result of coalescing ice sheets or as the result of the thermal regime existing within a single ice sheet. The oldest till is named the St. Francis and is correlated with the Chaudière Till of southeastern Quebec. The other tills are named the Mars Hill and Van Buren tills, respectively, and are correlated with the Lennoxville till of southeastern Quebec. Interbedded stratified sediments associated with the St. Francis till are correlated with the Gayhurst Formation. Stratified sediments associated with Van Buren and Mars Hill tills are correlated with post Lennoxville sediments of Quebec. Granite-gneiss erratics of Canadian Shield provenance in the Van Buren till indicate advance of the Laurentide ice into northern Maine during late Wisconsinan time. Moraines in southern Aroostook County with associated outwash and eskers record general recession from coastal Maine. Recession occurred after the formation of the Pineo Ridge moraine in Maine and the St. Antonin-Highland Front moraine complex in Quebec. The Caribou-Winterville moraine complex in northern Maine marks the boundary between the penecontemporaneously deposited Van Buren and Mars Hill surface tills and is correlated with the Grand Falls moraine at Grand Falls, New Brunswick.

Type
Original Articles
Information
Quaternary Research , Volume 16 , Issue 1 , July 1981 , pp. 48 - 65
Copyright
University of Washington

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