Title: Field Trip A4: October 14th Lithofacies & Structure Of The Taconic Flysch, Melange, & Allochthon In The New York Capital District
Abstract: This trip will cover the full width of the deformed belt of Medial Ordovician flysch that outcrops adjacent to the Taconic Allochthon. It will include examination of the flatlying flysch bordering the western side of the deformed belt, and of the western part of the Taconic Allochthon, which confines the eastern margin of the deformed flysch belt. Locally, excellent exposures show the structural transition from the undeformed to the folded and thrust flysch, and the further deformation to melange associated with shearing on thrust fault zones. The large-scale domainal structure of the deformed flysch belt, with intercalated belts affected by greater (melange) and lesser (folding) deformation, and by some of the melange containing ‘exotic clasts, will be illustrated by several stops, including Cohoes Gorge along the Mohawk River. One of the very few exposures of the fault that places the western edge of the Taconic Allochthon against melange will also be visited. The trip aims to demonstrate a structure of the deformed flysch belt of the Hudson Valley dominated by faults, including a significant contribution from out-of-sequence imbrication of older faults, and with most of the flysch and melange being very considerably allochthonous. This picture is similar to that established for the same belt of rocks in southern Quebec, but differs fundamentally from the interpretation shown on recent published geological maps of the Hudson Valley.
Publication Year: 1995
Publication Date: 1995-01-01
Language: en
Type: article
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Cited By Count: 1
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