Mountain Rock

I checked out a local bluegrass band at a pub this evening. Afterward, conversation turned to the sociological and geological merits of various mountain ranges. The Appalachians may have music, religion, and culture, but I still gaze in awe at the jagged rocks of the Cascades.
The National Park Service has some cool maps and information regarding the Geologic provinces of the United States. Any site that can meaningfully use the phrase, “when dinosaurs roamed the Earth” is worth a visit.