G eology and politics aren’t obvious bedfellows, but nearly every presidential election in recent memory carries a reminder of North America’s Mesozoic past. Take a look at a map of voting by county, ...

Something very strange appears to be happening deep, deep underneath the U.S. Midwest and the Ohio Valley. North America’s geological core has persisted for more than a billion years; it’s what ...

The ground beneath North America is not as stable as it looks. Beneath cities, suburbs, and farmland, ancient fractures in ...

Around 510 million years ago, after a major gap in the geologic record, the world flooded. This gap, known as the Great Unconformity, starts at different ages in different places, but it always ...