Special POTD submission! August 2, 2013: Cascade Falls Trail

Special thanks to Burke McClure for the submission!

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POTD August 2, 2013: Wasatch Range, Morgan County, Utah

Wasatch Range, Morgan County, UtahPhotographer: Ashley H. Elliott

Glaciated peaks and cirques on the east side of the Wasatch Range

POTD August 1, 2013: Zion National Park, Washington County, Utah

Zion National Park, Washington County, Utah
Photographer: Lance Weaver

Zion Canyon viewed from Observation Point, showing Angels Landing and The Great White Throne.

POTD July 31, 2013: Wahweap Bay,Lake Powell, Glen Canyon National Recreation Area, Kane County, Utah

Lake Powell, Glen Canyon National Recreation Area, Kane County, Utah
Photographer: Lance Weaver

 

Wahweap Bay at the south end of Lake Powell, Glen Canyon National Recreation Area.

POTD July 30, 2013: Island in the Sky District, Canyonlands National Park, San Juan County, Utah

Island in the Sky District, Canyonlands National Park, San Juan County, Utah
Photographer: Mike Hylland

Desert primrose blooms in thin, gravelly soil along the White Rim Trail. The Permian-aged White Rim Sandstone forms a broad, nearly flat bench above the adjacent Green and Colorado Rivers and below towering cliffs (visible in the distance) of the Triassic-Jurassic-aged Wingate Sandstone and thin cap of Jurassic Kayenta Formation. In the middle distance, Candlestick Tower consists of Kayenta Formation and Wingate Sandstone above sloping Chinle Formation (Triassic) on a base of Moenkopi Formation (Triassic), which overlies the White Rim Sandstone. The gentle tilt of the strata reflects their location on the southwestern flank of the broad downwarp of the Grays Pasture syncline.

POTD July 29, 2013: Lake Mountains, Utah County, Utah

Lake Mountains, Utah County.
Photographer: J. Lucy Jordan

UGS geologists provide oversight and run downhole geophysical logs during ground-water monitoring-well drilling.

POTD July 26, 2013: San Rafael Swell, Emery County, Utah

San Rafael Swell, Emery County, Utah
Photographer: Taylor Boden

Boulders of Cretaceous-age Ferron Sandstone, eroded from the top of a distant butte, have come to rest on the Cretaceous-age Mancos
Shale on the west flank of the San Rafael Swell.

POTD July 25, 2013: Slickrock Trail near Moab, Grand County, Utah

Slickrock Trail near Moab, Grand County, Utah
Photographer: Jim Davis

Giant weathering pits or potholes like this one (about 16 feet across at the bottom) in the Jurassic-age Navajo Sandstone typically form along fractures and joints atop fins, knolls, and rounded domes. Potholes are created through a combination of physical, chemical, and biological processes that weather and erode the rock and are home to a remarkable array of ancient aquatic organisms.

POTD July 24, 2013: Grand Staircase–Escalante National Monument, Kane County, Utah

Grand Staircase–Escalante National Monument, Kane County, Utah
Photographer: Tyler Knudsen

The narrow defile of Round Valley Draw exposes layers of ancient petrified dunes of the Jurassic-age Navajo Sandstone. This is one of numerous slot canyons in Utah’s canyon country formed by the scouring action of infrequent but powerful flood waters.

POTD July 23, 2013: Trilobite, House Range, Millard County, Utah

 

Trilobite, House Range, Millard County, Utah
Photographer: Michael Vanden Berg

Cambrian-age shales from western Utah’s House Range contain millions of fossilized trilobites, such as this specimen of Elrathia kingi.