ꯁꯟꯗꯣꯛꯅꯥ ꯇꯥꯛꯄꯥWestern Interior Seaway - 95Ma (with ancient continents).svg
English: The extent of the Western Interior Seaway 95 million years ago overlaid on the modern North American continent. Both island continents Laramidia and Appalachia are shown. Note that the positions of the continents, lakes, rivers, and shores were not the same as today.