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Bulletin of Canadian Petroleum Geology; June 2006; v. 54; no. 2; p. 152-174; DOI: 10.2113/gscpgbull.54.2.152
© 2006 Canadian Society of Petroleum Geologists
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Sedimentology and stratigraphy of a thick, areally extensive fluvial–marine transition, Missisauga Formation, offshore Nova Scotia, and its correlation with shelf margin and slope strata

Don I. Cummings1

Department of Earth Sciences, University of Ottawa, Ottawa, ON K1N 6N5, cummings{at}geol.queensu.ca

Bruce S. Hart

Department of Earth and Planetary Sciences, McGill University, Montreal, Quebec H3A 2A7

R. William C. Arnott

Department of Earth Sciences, University of Ottawa, Ottawa, ON K1N 6N5

A 100 m thick, more than 20 km wide upward-fining succession at the top of the Lower Cretaceous Upper Member of the Missisauga Formation was investigated in the Panuke Field, offshore Nova Scotia, using core, well logs and 3-D seismic data. The succession consists of 50 m of dune cross-stratified sandstone overlain by 50 m of tide-influenced heterolithic strata, which in turn is overlain by 150 m of mudstone of the Naskapi Member of the Logan Canyon Formation. The succession is interpreted to be a fluvial–marine transition formed during a long-term (3rd order) relative sea-level rise. The two main Panuke reservoirs are thin (<5 m) sheet-like sandstones at the Missisauga–Naskapi contact interpreted to be remnants of a wave-formed barrier system. In seismic data, the Upper Member of the Missisauga Formation correlates basinward with progradational shelf-margin reflections, suggesting that the sheet-like fluvial sandstone at the base of the upward-fining succession transferred sediment, and possibly sand, to the continental slope.




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