Predicting North America's Geography 100 Million Years Hence

Long‑term geological forecasting is highly uncertain, but plausible scenarios include:

1. Continued westward drift from plate tectonics.
2. Sea‑level fluctuations altering coastlines (rise from melting ice, fall from circulation changes).
3. Mountain building and erosion reshaping topography and climate patterns.
4. Climate‑change impacts shifting vegetation zones, habitats, agriculture.
5. Biodiversity turnover with extinctions and new adaptations.

Actual outcomes depend on unpredictable geological, climatic, and biological processes.