What cities would have been on the shoreline of gulf Mexico during upper Cretaceous?

During the Upper Cretaceous period, approximately 99.6 million to 65.5 million years ago, the configuration of Earth's continents and oceans was significantly different from what we see today. The shoreline of the Gulf of Mexico during this time would have been markedly different, positioned hundreds of kilometers east of its current location.

Here are a few cities that would have been in direct proximity to the Gulf of Mexico during the Upper Cretaceous period, based on the estimated paleogeography:

1. Havana, Cuba: During the Upper Cretaceous, Havana would have been on the western edge of the gulf's shoreline. Today, it's located on the northern shore of the Gulf of Mexico.

2. Cancún, Mexico: Cancún would have been on the northwestern coastline of the Upper Cretaceous Gulf of Mexico, near the Yucatán Peninsula.

3. Port-au-Prince, Haiti: The modern-day city of Port-au-Prince would have been very close to the southeastern shore of the Upper Cretaceous Gulf of Mexico.

4. Grand Cayman: The island of Grand Cayman, located in the British West Indies, would have been on the southern shoreline of the gulf during this period.

5. Tampa, Florida, United States: While not directly on the shoreline, Tampa would have been significantly closer to the Gulf of Mexico during the Upper Cretaceous, likely just inland from the coastline.

6. Bogotá, Colombia: During this period, Bogotá would have been located near the northern part of the Gulf of Mexico's shoreline. While today it's hundreds of kilometers away, Colombia was situated much closer to the North American continent during the Late Cretaceous.

7. Caracas, Venezuela: Caracas, the capital of Venezuela, would have been near the eastern edge of the Upper Cretaceous Gulf of Mexico.

These cities' proximity to the coastline millions of years ago was vastly different due to the movement and shifts of the tectonic plates over time. The positions described above are based on paleogeographic reconstructions that estimate the earth's geography during the Upper Cretaceous.