Cool stuff about the origin of the Grand Canyon. (In a power point file, beware.) I can’t really evaluate the validity of the particulars, but in general I find speculations about such things very illuminating.
Plus caving in the ditch seems enthralling.
Edit: Steve and I are getting psyched about the Grand View trail, investigation in late April.
Links:
Podunk Creek quad (note “Pack trail” in lower reaches)
An actual mtn bike trip on the trail! With a map!
And a funny moment. ~40 minutes ago a student said, in complete seriousness: “Who was this guy Gettysburg, and why would he give his address to people?”

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