Dixie National Forest, Garfield County, Utah
Photographer: Robert F. Biek; © 2012
Colorful volcanic sandstone and mudstone of the Brian Head Formation record initiation of volcanic activity in southwest Utah about 36 million years ago. Here, Eocene-age Brian Head deposits form rugged badlands at the south end of the Sevier Plateau.
Canyonlands National Park, San Juan and Wayne Counties, Utah
Photographer: Rich Emerson; © 2012
Uplift of the Colorado Plateau has caused the Green River to entrench its meandering path into the relatively soft rocks of the Permian-age Organ Rock Shale. At Soda Springs Basin, vertical cliffs of the more-resistant White Rim Sandstone cap the Organ Rock Shale 400 feet above the river.
Here’s a rockin’ scenic view to jump start another weekend!
The Rimrocks, Grand Staircase–Escalante National Monument, Kane County, Utah
Photographer: Taylor Boden; © 2012
Spire-like formations called “toadstools” form where resistant sandstone boulders of Cretaceous-age Dakota Formation (toadstool caps) protect the underlying, softer, Jurassic-age Entrada Sandstone (toadstool stems) from erosion. Beneath their protective caps, the spires stand tall above the surrounding eroded landscape.
The Cockscomb, Grand Staircase–Escalante National Monument, Kane County, Utah
Photographer: Stevie Emerson; © 2012
The Cockscomb formed along the steeply tilted sedimentary layers of a geologic feature known as the East Kaibab monocline. Faulting and erosion have shaped the tilted Jurassic and Cretaceous-age rocks into the spectacular “rooster’s comb” features seen today along Cottonwood Canyon Road.
Skyline Drive, Wasatch Plateau, Sanpete County, Utah
Photographer: Rich Emerson; © 2012
At 10,133 feet, winter clings to outcrops of the Tertiary-age Flagstaff Limestone near the crest of the Wasatch Plateau at Snow Lake. The steep, forested slope to the left (east) of the lake is a scarp associated with one of several faults forming a down-dropped crustal block called the Snow Lake graben.