Other geobloggers cover Arizona geology topics with 3 recent posts.
Garry at Geotripper, just posted a set of scenic photos and comments from his swing through the area. [right Grand Canyon from Yaki Point. Credit, Geotripper]
Dave's Landslide Blog offers some obsservations on the "unusual morphology" of SR87 landslide.
Jeffrey at Paleo Errata published part 2 of his series on the Upper Triassic of Petrified Forest National Park.