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The AAPG/Datapages Combined Publications Database

AAPG Special Volumes

Abstract

Pub. Id: A106 (1969)

First Page: 110

Last Page: 114

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

Article/Chapter: Short Account of Cambrian and Tremadocian of Acado-Baltic Province: Chapter 7: Southeastern Border of the Orogenic Belt

Subject Group: Geologic History and Areal Geology

Spec. Pub. Type: Memoir

Pub. Year: 1969

Author(s): Gunnar Henningsmoen (2)

Abstract:

The Cambrian and Tremadocian sequences of the Acado-Baltic province have remarkable similarities on both sides of the North Atlantic, both faunally and lithologically. Stratigraphic breaks seem to be present at about the same levels--at the junctions of (1) the Lower and Middle Cambrian; (2) the Middle and Upper Cambrian; (3) the Olenus and Parabolina zones within the Upper Cambrian; and (4) the Upper Cambrian and Tremadocian. However, a section through the Upper Cambrian-Tremadocian contact on Navy Island, St. John, New Brunswick, shows at the most a small faunal gap.

The Cambrian and Tremadocian trilobite faunas in the Acado-Baltic province are referred to as the "Ellipsocephalid" (Lower Cambrian), "Paradoxidid" (Middle Cambrian), "Olenid" (Upper Cambrian), and "Ceratopygid" (Tremadocian) faunas. More work is needed on their paleoecology in order to evaluate fully their similarity on both sides of the North Atlantic.

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