What caused Great Salt Lake?

Around 15,000 years ago, the lake spilled out and drained through the Snake and Columbia Rivers, dropping the lake level by 350ft. The lake continued to drop through evaporation. As it did so, it became saltier and saltier, leaving a “puddle” that is now the Great Salt Lake.



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The best place to swim or float in the lake is at Antelope Island State Park, where white oolitic sand beaches provide easy access to the lake without the brine flies that are prevalent on other areas of the shoreline. The beach area also has showers to rinse off the salty water.

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According to a recent study by Brigham Young University, it's possible that Great Salt Lake could dry up completely in the next five years.

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Water experts say it's going to take more than one big year to fill the Great Salt Lake. SALT LAKE CITY — Ever since The Great Salt Lake hit its lowest water level on record in November 2022, concerns over things like arsenic in the exposed lake bed have only grown.

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However, the most deleterious effect of the Great Salt Lake drying up is that the air surrounding Salt Lake City could sporadically become poisonous. Since the bed of the Great Salt Lake holds high levels of dangerous particles like arsenic, antimony, copper, zirconium, and various heavy metals.

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New analysis says Great Salt Lake can be saved, but not without great effort, and expense.

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It was called Lake Bonneville, and northern Utah, southern Idaho, northern Nevada was all underwater, a freshwater lake. But as the Earth warmed up, ice dams broke, and water evaporated, and all the water seeping out left behind this salty puddle in the bottom of the bathtub, and that's what we call Great Salt Lake.

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The economic output of Great Salt Lake is $1.32 billion annually, with a total labor income of $375.1 million and total employment of 7,706 jobs. The industries that operate on the lake contribute significantly to the world supply of magnesium, sulfate of potash, and brine shrimp.

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With a salinity level over 40 percent, Don Juan is significantly saltier than most of the other hypersaline lakes around the world. The Dead Sea has a salinity of 34 percent; the Great Salt Lake varies between 5 and 27 percent. Earth's oceans have an average salinity of 3.5 percent.

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Great Salt Lake is between 3.5 and 8 times saltier than the ocean. The organisms that live in the water have special adaptations that allow them to survive such saline conditions. Air blocks much of the sun's DNA-damaging ultraviolet light from reaching the surface of the earth.

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Around 15,000 years ago, the lake spilled out and drained through the Snake and Columbia Rivers, dropping the lake level by 350ft. The lake continued to drop through evaporation. As it did so, it became saltier and saltier, leaving a “puddle” that is now the Great Salt Lake.

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So just how bad is it, really? A new scientific report warns the lake is on track to disappear in the next five years, unless water use is cut by as much as 50% annually.

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All of this winter's rain and snow that fell directly into the Great Salt Lake increased the water level there by three feet.

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The shallow bottom of Great Salt Lake supports a microbial carpet that harness the sun's energy through the process of photosynthesis. This carpet is made up of a community of microbes, including several types of cyanobacteria (also known as blue-green algae), algae and other organisms.

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A recent report found that the lake could essentially disappear within five years. As a key stopover for migrating birds, the lake's loss could undermine whole ecosystems. These salty lakes occur in so-called endorheic basins—places where there is no outlet for the water to flow out to sea.

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The Great Salt Lake is home to many important biological and wildlife species, from archaea, to bacteria, to phytoplankton (400+ species). Perhaps the three most apparent species that can be seen with the naked eye are brine shrimp (tons), brine flies (billions) and birds (millions).

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Even when the water temperature is in the 20's (°F), the lake does not freeze, due to the high salt content of the water; but icebergs have been ob- served floating on the lake's surface, formed from freshwater that flows into the lake from tributaries and freezes on the surface before it mixes with the brine.

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Compass Minerals announced in 2021 it was seeking to extract lithium from the Great Salt Lake under a pilot program. The company, which has a plant in Ogden, said it was utilizing new methods of extracting the precious resource within the ambient brine of the Great Salt Lake.

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Climate change isn't only causing wildfires and massive heat waves, but it's drying up vital bodies of water such as the Great Salt Lake bordering the Salt Lake Valley.

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