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Regional Geology of the Grand
Banks of Newfoundland
The geologic subdivisions of Grand Banks record
the development of the:
– Lower Paleozoic American continental margins,
– Late Triassic intra-continental rifts incised on Grenville, Avalon and
Meguma basement,
– Late Triassic-Early Jurassic massive salt and other evaporite deposition
– Repeated phases of intra-continental extension (Late Jurassic-Early
Cretaceous and Albian -Aptian)) and intervening subsidence which
included source and reservoir rocks deposition
– Formation of transitional crust
– The late Early Cretaceous break-up (oceanic rifting) from Iberia and
later from West Ireland
– Increased thermal subsidence in Late Cretaceous
– Inversion at the end of Cretaceous-beginning of Tertiary
– Post - Paleocene widespread subsidence and basin tilting
Enachescu, NL DNR 2009