I love this article. Please buy their newspaper!
Here you can see the balkanization of US geology. All geology stops at the state boundaries. And here it is also stopping at the Paleozoic. There is some prohibition from looking at the Precambrian. In this case, it is not a 300 million year old mountain range, but a one billion year old thing. These are the giant megathrusts that go through the entire eastern half of the continent. Nevertheless, this is the first time I've read a glancing blow to the truth. :)
Texas just had an M3.8 in the middle of nowhere along this line. What a shock to them! I wonder how quickly they can squash this. Anyway, read the article, so I don't have to do more 'background' posts. :)