Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
7,000,000 years...
https://www.livescience.com/why-cat-gap-north-america-fossils
That's interesting, It would seem we'd have found some at least if they were there.