Online Field Trip Guide: Oak Creek-Mormon Lake Graben

An online geologic field trip guide is now available for Oak Creek-Mormon Lake Graben, North-Central Arizona. Written by Paul Lindberg, the guide circumnavigates a loop of ~120 miles from Flagstaff to Sedona along Highway 89A and returns to Flagstaff along the Lake Mary Road.

The 12 geologic stops focus on recent faulting and the encroachment of Basin and Range extensional structures on the Colorado Plateau. Each stop is detailed in the text, which is amply illustrated with photographs and colored geologic sketches.

The guide is made available to the public courtesy of Paul Lindberg and the Arizona Geological Society. Click here to access the guide.

Cross section of the Oak Creek - Mormon Lake graben (PL)

Cross section of the Oak Creek – Mormon Lake graben (PL)

Schnebly Hill sandstone deformed along Laramide-age, reverse Oak Creek fault

Schnebly Hill sandstone deformed along Laramide-age, reverse Oak Creek fault

Basalt lava flow capping volcanic tephra at junction of Stoneman Lake and Lake Mary Rd.

Basalt lava flow capping volcanic tephra at junction of Stoneman Lake and Lake Mary Rd.

Geologist Paul Lindberg at exposure of the Lake Mary Fault on Marshall Rd adjacent to Upper Lake Mary

Geologist Paul Lindberg at exposure of the Lake Mary Fault on Marshall Rd adjacent to Upper Lake Mary

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