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POTD August 12, 2014: Raft River Mountains, Box Elder County, Utah

The views in Utah go on for days, years, and centuries. Good thing we’ve got all of these beautiful geology photos to share with you! Have a wonderful evening, geo friends.

Raft River Mountains, Box Elder County, Utah
Photographer: Adam Hiscock; © 2013

Raft River metamorphic core complex, Raft River Mountains, Box Elder County, Utah.

POTD June 17, 2014: Spiral Jetty, Great Salt Lake, Box Elder County, Utah

Spiral Jetty, Great Salt Lake, Box Elder County, Utah
Photographer: Mark Milligan; © 2013

Black basalt boulders of the Spiral Jetty in Great Salt Lake, Box Elder County.

POTD May 27, 2014: Wendover, Box Elder County, Utah

Here’s a photo to help you get back into the swing of things. We hope everyone had a great weekend!

Wendover, Box Elder County, Utah
Photographer: Gregg Beukelman; © 2013

Jurassic-age quartz monzonite at Crater Island near Wendover, Box Elder County.

Preliminary Isostatic Residual Gravity Map of the Tremonton 30' x 60' Quadrangle, Box Elder & Cache Counties, Utah, and Franklin & Oneida Counties, Idaho

By: V.E. Langenheim, R.Q. Oaks, H. Willis, A.I. Hiscock, B.A. Chuchel, J. Rosario, and C.L. Hardwick

A new isostatic residual gravity map of the Tremonton 30′ x 60′ quadrangle of Utah is based on compilation of preexisting data and new data collected by the Utah and U.S. Geological Surveys. Pronounced gravity lows occur over North Bay, northwest of Brigham City, and Malad and Blue Creek Valleys, indicating significant thickness of low-density Tertiary sedimentary rocks and deposits. Gravity highs coincide with exposures of dense pre-Cenozoic rocks in the Promontory, Clarkston, and Wellsville Mountains. The highest gravity values are located in southern Curlew Valley and may be produced in part by deeper crustal density variations or crustal thinning. Steep gradients also coincide with the margins of the Promontory Mountains, Little Mountain, West Hills, and the eastern margin of the North Promontory Mountains and may define concealed basin-bounding faults.

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Utah Bucket List: Spiral Jetty enchants on dynamic canvas

sltrib.com

Great Salt Lake • A salt-laden November fog fills the valleys of the Promontory Mountains like the crests of waves on an ocean. Thick storm clouds allow scattered streaks of sunlight, creating sliding silver bands on a water tinted red with bacteria.

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PRELIMINARY ISOSTATIC RESIDUAL GRAVITY MAP OF THE NEWFOUNDLAND MOUNTAINS AND EAST PART OF THE WELLS 30' x 60' QUADRANGLES, BOX ELDER COUNTY, UTAH

By: V. E. Langenheim, N.D. Athens, B.A. Churchel, H. Willis, N.E. Knepprath, J. Rosario, J. Roza, S.M. Kraushaar, and C.L. Hardwick

A new isostatic residual gravity map of the Newfoundland Mountains and east of the Wells 30×60 quadrangles of Utah is based on compilation of preexisting data and new data collected by the Utah and U.S. Geological Surveys. Pronounced gravity lows occur over Grouse Creek Valley and locally beneath the Great Salt Lake Desert, indicating significant thickness of low-density Tertiary sedimentary rocks and deposits. Gravity highs coincide with exposures of dense pre-Cenozoic rocks in the Newfoundland, Silver Island, and Little Pigeon Mountains. Gravity values measured on pre-Tertiary basement to the north in the Bovine and Hogup Mountains are as much as 10mGal lower. Steep, linear gravity gradients may define basin-bounding faults concealed along the margins of the Newfoundland, Silver Island, and Little Pigeon Mountains, Lemay Island and the Pilot Range.

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POTD October 24, 2013: Devil's Playground, Grouse Creek Mountains, Box Elder County, Utah

Devil’s Playground, Grouse Creek Mountains, Box Elder County, Utah
Photographer: Don Clark

After a storm, evening light washes over granitic rocks of Devils Playground in the southern Grouse Creek Mountains. The granitic rocks of the Emigrant Pass pluton were emplaced in phases from 41 to 34 million years ago and intrude metamorphosed sedimentary rocks.

POTD September 10, 2013: Spiral Jetty in Great Salt Lake near Promontory Point, Box Elder County, Utah

Spiral Jetty in Great Salt Lake near Promontory Point, Box Elder County, Utah
Photographer: Don Clark

Great Salt Lake is likely best known for its high salinity and large size. Yet this unique lake also supports mineral and brine-shrimp industries,  provides a resting place for millions of migratory birds, and reveals varied spectacular sights. Sunsets over distant islands, white beaches, and water colors ranging from blue to pink offer inspiration for artists.

Boulders of basalt, now salt-encrusted, were moved from shore by artist Robert Smithson to create Spiral Jetty in Great Salt Lake near Promontory Point, Box Elder County.

POTD June 27, 2013: Rozel Point, Great Salt Lake, Box Elder County, Utah.

Rozel Point, Great Salt Lake, Box Elder County, Utah.
Photographer: Ken Krahulec

The 1500-foot-long Spiral Jetty, built in 1970 of black Tertiary-age basalt, is the  principal earthwork of the  prominent American sculptor Robert Smithson.

REPORT OF INVESTIGATION 265

GROUND-WATER SENSITIVITY AND VULNERABILITY TO PESTICIDES, CURLEW VALLEY, BOX ELDER COUNTY, UTAH
Mike Lowe, Janae Wallace, Stefan Kirby, 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 27-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 Curlew Valley, Box Elder County, Utah.

CD (27 p., 2 pl.)

RI-265………$19.95

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