Of the various lots of foraminiferal material collected from the walls of the canyons on the south side of Georges Bank, one, the greensand from Canyon II, Tow 6, is very distinctively Cretaceous in age, the others, greensand and the silts, are of late Tertiary age.
The Cretaceous greensand contains a large fauna and is apparently to be correlated with faunas of known Upper Cretaceous, Navarro age, of the general Gulf Coastal Plain region. Unfortunately, the foraminiferal fauna of the Cretaceous of the Atlantic Coastal Plain is not yet well enough known, so that correlations with that area cannot be definitely made. Some of the species are identical with those of the Cretaceous, upper Selma chalk, of Tennessee, and most of them are found in clays of known Navarro age in the Texas area. The large number of species and their known vertical ranges show the undoubted Cretaceous age . . .