Abstract
Geophysical and drilling operations within the Grand Banks area have established the existence of a thick sedimentary section that includes Tertiary, Mesozoic, and Paleozoic strata. An angular unconformity that developed in Early Cretaceous time divides the section into 2 distinct geologic units: the "upper wedge," comprised of Tertiary and Cretaceous strata, and the "subunconformity basins," containing Jurassic and older rocks. The relatively simple upper wedge has regionally gentle dip, disturbed by salt-dome structures. The subunconformity basins contain many structural types, including salt domes, salt ridges, faults, drape folds over basement blocks, and major sedimentary truncations at the unconformity.
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