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Striking lake oddity created by causeway to get makeover

Great Salt Lake’s North Arm is a little salty, even for Great Salt Lake. The Union Pacific railroad causeway is a factor in the build-up of salt crust in the north arm. The Railroad will be starting a bridge-building project to replace a part of the causeway, mitigating some of the water flow issues. Two of our geologists here at the UGS talk about the salt build up and how it’s affected the North Arm.

ksl.com

One of the strangest and most striking places in Utah — an enormous oddity that scientists say was created accidentally by human engineering — is getting a bit of a remodeling job.

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Alpenglow illuminates the glacially sculpted Stansbury Mountains as seen from the shores of Great Salt Lake. Deseret Peak (11,031 feet), the leftmost high summit, is the range’s highest peak and is underlain by Cambrian-age Prospect Mountain Quartzite. Stansbury Mountains, Tooele County, Utah Photographer: Gregg Beukelman; © 2015

POTD September 25, 2015: Stansbury Mountains, Tooele County, Utah

Have a wonderful weekend, everyone!

POTD 9-25-15 Stansbury Mountains Tooele County

Stansbury Mountains, Tooele County, Utah
Photographer: Gregg Beukelman; © 2015

Alpenglow illuminates the glacially sculpted Stansbury Mountains as seen from the shores of Great Salt Lake. Deseret Peak (11,031 feet), the leftmost high summit, is the range’s highest peak and is underlain by Cambrian-age Prospect Mountain Quartzite.

Answers to the white foam along Great Salt Lake shoreline

ksl.com

For those who have seen piles of white, pillowed foam along the shores of the Great Salt Lake and wondered what caused it, the Utah Geological Survey has an answer.

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Bioherm, Great Salt Lake, Antelope Island

Antelope Island Bioherm Flyover


The shallow waters of Bridger Bay, on the northwestern tip of Antelope Island in the southern arm of hypersaline Great Salt Lake, support extensive microbial carbonate formation, especially in the north-northeast portion of the bay near Egg Island.  Lake levels in the fall of 2014 were near 60-year lows (as low as 1278.1 m [4193.3 ft] AMSL, compared to the near-term historic average of about 1280 m [4200 ft]), giving unprecedented access to the microbial structures.  Characterizing the microbialites of Bridger Bay, including facies delineation and aerial extent, can inform interpretations of similar deposits in the ancient rock record (e.g., Eocene Green River Formation), including potential petroleum reservoirs.

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Closed Causeway Causes Curious Changes to Great Salt Lake

upr.org

The Great Salt Lake is, right now, actually two lakes split in half by a long railroad causeway.  A couple years ago the crumbling culverts that allowed flow between the north and south arms of the lake were closed for safety.  Since then, scientists say, curious things are happening to the lake, especially as it approaches historic low levels.

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Geologic Map of Unconsolidated Deposits in the Hogup Bar Quadrangle, Box Elder County, Utah

MP 15-2DM, Hogup Bar Quadrangle, Box Elder

By: Daren T. Nelson and Paul W. Jewell

The Hogup Bar quadrangle is located southeast of Park Valley, Utah, and west of the northwest arm of Great Salt Lake. Late Pleistocene Lake Bonneville sediments and related shorelines dominate the landscape, and record the transgression and regression of Lake Bonneville. Surficial deposits overlie Tertiary basalt and Permian-Pennsylvanian sedimentary bedrock.

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Jay Evensen: Shrinking Great Salt Lake signals need for better water policies

Great Salt Lake may ebb and flow, however its current low levels give impetus to talk about water use, and how to use it more wisely in the desert. Andrew Rupke, a minerals specialist here at UGS, joins the conversation in this article. Check it out!

deseretnews.com

Not many states have a defining natural feature that locals actually discourage visitors from seeing.

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“Popular Geology” December 18, 2014

While the weather has been warm, and there’s not a lot of snow or ice around, it’s a great time of year to look at the Ice Age animals of Utah. Did you know that Great Salt Lake is the remnant of Ice Age lake, Lake Bonneville? Read more about this different age in Utah in our “Popular Geology” subjects HERE.

Sunset over Great Salt Lake, Davis and Tooele Counties, Utah Photographer: Mark Milligan; © 2013

POTD December 16, 2014: South Arm of Great Salt Lake, Davis and Tooele Counties, Utah

POTD 12-16-14 Great Salt Lake, Davis County, Tooele County

Great Salt Lake, Davis and Tooele Counties, Utah
Photographer: Mark Milligan; © 2013

Take in this photo as your day comes to a close. Sometimes a setting sun brings out the best colors in Utah Geology.

What lurks beneath the Great Salt Lake?

fox13now.com

Utah’s Great Salt Lake has been protecting the Wasatch Front from a potential health hazard for 150 years, but that protection is threatened, say some scientists, by a growing, thirsty population and a drying climate.

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