Grand Banks Regional Geology: ABSTRACT

Geophysical and drilling operations within the area of the Grand Banks have established the existence of thick sedimentary accumulations that include Tertiary, Mesozoic, and Paleozoic formations. An angular unconformity that developed in Early Cretaceous time divides the section into two distinct geologic units. The "upper wedge" is comprised of Tertiary and Cretaceous formations, whereas the "subunconformity basins" contain Jurassic and older formations. The structure of the upper wedge is relatively simple, consisting of regional dip broken locally by salt-dome structures. The subunconformity basins contain a great variety of structural types, including salt domes, salt ridges, and basement-controlled block faults. End_of_Article - Last_Page 2146------------