Entries by Utah Geological Survey

POTD February 17, 2014: Wellsville Mountains near Honeyville, Utah

Hope you all enjoy the President’s Day holiday! Here’s your photo for the day. Wellsville Mountains near Honeyville, Utah Photographer: Chris DuRoss; © 2011 Limestone clasts deposited by a debris flow (fast-moving mixture of sediment and water) at the base of the Wellsville Mountains near Honeyville. Debris flows form as saturated hillslope sediments move or […]

POTD February 14, 2014: Bear River, Rich County, Utah

Would you be our Valentine? You geo friends really rock! Bear River, Rich County, Utah Photographer: Chris DuRoss; © 2011 This sand boil (eruption of liquefied sand) resulted from ground shaking during the 2010 magnitude 4.5 Randolph earthquake, which is one of the smallest earthquakes recorded to generate liquefaction. Bear River, Rich County.

"Spot the Rock" February 13, 2014

It’s Thursday, and time for another “Spot the Rock” challenge! Let’s see how many of you can guess where this is! Like us on FACEBOOK or follow us on TWITTER to participate in “Spot the Rock”! UPDATE: Location Revealed Alhambra Rock is a diatreme seen to the west of Scenic Byway 163 is southeastern Utah just south of Mexican […]

Learn about geology of old mining area

thespectrum.com SILVER REEF — The Museum at Silver Reef is sponsoring a “Geology Walk and Talk” Feb. 22 led by geologist Marc Deshowitz. The presentation is free to the public and will begin at 10 a.m. at the Cosmopolitan restaurant next to the museum, 1903 Wells Fargo Road in Silver Reef. The walk will lead to […]

POTD February 12, 2014: Wasatch Plateau, eastern Sanpete County, Utah

Wasatch Plateau, eastern Sanpete County, Utah Photographer: Rich Giraud; © 2011 The lower part of the Slide Lake landslide has averaged 14 feet of movement per year between 2004 and 2009. The landslide occurred in the Tertiary-Cretaceous-age North Horn Formation, which is known for producing many large landslides. Near Joes Valley Reservoir, the 1.2 miles […]

Interim Geologic Map of the Enoch Quadrangle, Iron County, Utah

By: Tyler R. Knudsen The Enoch quadrangle, in eastern Iron County, Utah, includes the northeastern part of Cedar Valley and parts of the adjacent Red Hills. The Red Hills-structurally consisting of an elevated, fault-bounded horst block-expose the upper parts of the Tertiary Claron Formation as well as a chaotic mass of Miocene and Oligocene volcanic […]

Interim Geologic Map of the Cedar City NW Quadrangle, Iron County, Utah

By: Tyler R. Knudsen and Robert F. Biek The Cedar City NW quadrangle includes the southwestern part of Cedar Valley and parts of the adjacent Eightmile Hills and Granite Mountain in Iron County, Utah. Exposed strata range from the Jurassic Temple Cap Formation to Oligocene-age quartz monzonite of the Granite Mountain laccolith. Emplacement of the […]

Interim Geologic Map of the Cedar City 7.5-Minute Quadrangle, Iron County, Utah

By: Tyler R. Knudsen The Cedar City 7.5′ quadrangle is roughly centered on the rapidly-growing community of Cedar City in Iron County, Utah. It straddles the boundary between the Basin and Range and Colorado Plateau physiographic provinces, which at the latitude of the quadrangle, is defined by the north-south-trending Hurricane fault. The eastern half of […]