On the Desert Road – Day 4: Prejudice, Prehistory and the Puzzle of Pictographs
The southwestern landscape hosts a variety of signature geologic forms, some of which have become iconic as the backdrops for countless western movies. If you should find yourself channel surfing late tonight, a single frame of a mesa, butte, spire or hoodoo will instantly lock you on to the genre, even before the dusty characters ride into view.
The desert rock garden is a less well known type, but it will be familiar to anyone who has spent any time knocking about the southwest, and around Arizona in particular. Unlike the angular, striated spires and hoodoos that erode out of sedimentary formations, rock gardens are more often volcanic in origin than not, usually granitic, and rounded in form, characteristically resembling enormous blowups of the sand dribbles that a child makes at the beach by allowing a slurry of water and sand to slip through her fingers.