Figure F8. Paleolatitude history of the Blake Nose margin from the late Aptian through the late Eocene. Bars on individual paleolatitude determinations (Table T6) indicate the age span of the sample suite and 95% confidence on paleolatitude. The mean paleolatitude path of the North American plate at this location with standard deviation is indicated by the shaded band and the central solid line. There has been no apparent significant paleolatitude variation of these sites through the Late Cretaceous and Paleogene. The present latitude of these sites is ~30.1°N. The North American paleolatitude estimate is modified from a compilation by C. MacNiocaill, L. Bardot, and J. Ogg (unpubl. data).