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The AAPG/Datapages Combined Publications Database

AAPG Special Volumes

Abstract

Pub. Id: A106 (1969)

First Page: 665

Last Page: 669

Book Title: M 12: North Atlantic: Geology and Continental Drift

Article/Chapter: Thrust Sheets and Gravity Slides of Western Newfoundland: Chapter 48: Northwestern Border of the Orogenic Belt

Subject Group: Geologic History and Areal Geology

Spec. Pub. Type: Memoir

Pub. Year: 1969

Author(s): Marshall Kay (2)

Abstract:

Allochthonous sequences of Cambrian and Ordovician sedimentary, volcanic, and ultrabasic intrusive rocks are preserved in two large areas in western Newfoundland--north and south of Humber Arm on the west, and in the region of St. Anthony on the north. The Humber Arm allochthon was transported, probably by gravity slide, during the Bonnian phase of the Taconian orogeny; sedimentary rocks as young as earliest Llanvirnian (early Chazyan) are overlain unconformably by limestone of the Long Point Group containing late Chazyan (Ashbyan-Valcourian Stage) and early Bolarian (Porterfieldian Stage) faunas. The transport of these sequences occurred long before that of the Taconic allochthon of western New England and eastern New York in the Vermontian phase of the Taconian orogeny n the medial Trentonian (Denmarkian Stage).

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