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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 65 (1981)

Issue: 5. (May)

First Page: 1011

Last Page: 1011

Title: Lower Cretaceous (Neocomian) Sedimentation of Sable Island Area, Scotian Shelf, Eastern Canada: ABSTRACT

Author(s): Peter B. Yuan

Article Type: Meeting abstract


Neocomian sedimentation in the Sable Island area, Scotian Shelf, eastern Canada, has been studied by analysis, of 13 offshore wells, using log analysis binocular and petrographic microscope examination of cutting-samples and cores, and stratigraphic map analysis.

The Neocomian is represented in the study area by the Missisauga Formation, a dominantly sandstone sequence containing thick sand units with minor limestone and shale interbeds in the central part of the Scotian basin. The Neocomian sandstones are texturally immature to supermature, and range from subarkose to volcanic sublitharenite with rare quartzarenite. Limestones include both sparry and micritic types. Shales are mostly carbonaceous, pyritic, and silty.

During the early Berriasian, coarse clastics were introduced to the study area from the north and northwest, and gradually built up a high-constructive, lobate-type delta. The source area included granite, acidic to intermediate volcanic rocks, and sedimentary and possibly some metasedimentary rocks. A regional transgression at the end of Neocomian terminated the delta.

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Copyright 1997 American Association of Petroleum Geologists