Utah Geological Survey

M-243DM

M-243DMSURFICIAL GEOLOGIC MAP OF THE SALT LAKE CITY SEGMENT AND PART OF ADJACENT SEGMENTS OF THE WASATCH FAULT ZONE, DAVIS, SALT LAKE, AND UTAH COUNTIES
(digitized from U.S. Geological Survey Miscellaneous Investigation Series map I-2106, 1992)
Stephen F. Personius and William E. Scott

This map shows the surficial deposits and the faults that offset them along the Salt Lake City segment and adjacent parts of the Weber and Provo segments of the Wasatch fault zone in north-central Utah.  The map area includes the central and eastern parts of the Salt Lake Valley, including metropolitan Salt Lake City and its southern suburbs.  Although a major surface-faulting earthquake has not occurred on the Wasatch fault zone since the state was settled in 1847, the geologic record contains abundant evidence of large earthquakes during Holocene and late Pleistocene time.  The size, age, and distribution of fault scarps produced by these prehistoric earthquakes can be used to determine the most likely sites for future earthquakes, and are therefore the principal focus of the map.

CD (2 pl., 1:24,000 [contains GIS files])

M-243DM……….$24.95

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Salt Lake County Geologic Hazard Maps

Utah Geological Survey

REPORT OF INVESTIGATION 266

RI-266GROUND-WATER SENSITIVITY AND VULNERABILITY TO PESTICIDES, BERYL-ENTERPRISE AREA, IRON WASHINGTON, AND BEAVER COUNTIES, UTAH
Mike Lowe, Janae Wallace, Rich Emerson, Anne Johnson, and Rich Riding

The U.S. Environmental Protection Agency has recommended that states develop Pesticide Management Plans for four agricultural chemicals—alachlor, atrazine, metolachlor, and simazine—herbicides used in Utah in the production of corn and sorghum, and to control weeds and undesired vegetation (such as along right-of-ways or utility substations). This 28-page report and two accompanying plates are intended to be used as part of these Pesticide Management Plans to provide local, state, and federal government agencies and agricultural pesticide users with a base of information concerning sensitivity and vulnerability of agricultural pesticides in the Beryl-Enterprise area, Iron, Washington, and Beaver Counties, Utah.

CD (28 p., 2 pl.)

RI-266………$19.95

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Utah Geological Survey

Glad You Asked—Why Does A River Run Through It?

river-runs-through-it Jim Davis

Even though we are a “desert” state, Utah’s rivers are world-renowned among river runners and geoscientists. Several of America’s early geologists, including G.K. Gilbert, W.M. Davis, C.E. Dutton, and J.W. Powell contributed to theories of stream evolution from observations made in Utah.

Rivers typically originate in the mountains, flow away from them in a more-or-less constant direction, enter increasingly broad river plains, and terminate at an ocean. But many rivers in Utah flow toward and across mountains, run contrary to valleys, make U-turns, and many never reach the ocean.

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Utah Geological Survey

Glad You Asked—Glacial Striations and Slickensides

slickensidesWhat are those groovy rocks and how did they get that way?
Carole McCalla

On a hike around Lake Blanche below Sundial Peak in Big Cottonwood Canyon, a group of hikers came across long, straight, parallel grooves on a smooth, polished rock surface. Recalling another location where they had seen similar features at the foot of the mountains north of downtown Salt Lake City, they wondered if these markings were formed in the same way. Indeed, what exactly are they and how were they formed?

Although the smooth, grooved surfaces at these two locations are similar, they were actually formed in very different ways.

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