I also found a great visual explanation of how the "bridge" was formed.
It's going to warm up a little later this week (finally) and since I'm not needed at the office I think I'm heading for southern Illinois on Wednesday for a few days of hiking. I've been wanting to check out Garden of the Gods and the Shawnee National Forest down there for a few years and it's less than a 7 hour drive. And I'll probably gain 10 degrees which is huge this time of year. Don't know if I'll see any arches, but rock formations are the big attraction of the area.
Linking up to Monday Mural.