Published as part of Landman, Neil H., Kennedy, W. James, Larson, Neal L., Grier, Joyce C., Grier, James W. & Linn, Tom, 2019, Description Of Two Species Of Hoploscaphites (Ammonoidea: Ancyloceratina) From The Upper Cretaceous (Lower Maastrichtian) Of The U.S. Western Interior, pp. 1-72 in Bulletin of the American Museum of Natural History 2019 (427) on page 4, DOI: 10.1206/0003-0090.427.1.1, http://zenodo.org/record/4613615

FIGURE 1. Overview of the Late Cretaceous Western Interior Seaway (left) and close-ups of the strandlines (right) during the deposition of the upper Campanian–lower Maastrichtian Baculites eliasi–B. grandis zones (modified from Landman et al., 2016). The numbered dots indicate U.S. localities cited in the text, as listed in the appendix.