Fig. 15 in Cephalopods From The Cretaceous/Tertiary Boundary Interval On The Atlantic Coastal Plain, With A Description Of The Highest Ammonite Zones In North America. Part 2. Northeastern Monmouth County, New Jersey

Fig. 15. Paleogeographic map showing the position of the shoreline of the eastern half of North America at the end of the Cretaceous based on stratigraphic sections spanning the K/T boundary. Circles are marine sections; boxes are terrestrial sections; circles within boxes are mixed marine/terrestrial sections. Explanations for 1–27 are in the appendix. 28, 29 = Raton Basin, New Mexico and Colorado (Izett, 1990); 30 = Denver Basin, Colorado (Brown, 1943; Nichols and Fleming, 2002); 31 = Lance Creek area, Wyoming (Bohor et al., 1987); 32 = Powder River Basin, near Sussex, Johnson County, Wyoming (Nichols et al., 1992); 33 = Slope and Bowman Counties, North Dakota (Nichols and Johnson, 2002); 34 = Makoshika State Park, Dawson County, Montana (Lund et al., 2002); 35 = Hell Creek area, Montana (Bohor et al., 1987).