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Last call to visit mirability mounds on GSL this weekend

SALT LAKE CITY — The public has one last chance to see a unique geological phenomenon at Great Salt Lake.

The Rangers take visitors to visit the mounds of mirability, just as they have the last two years.

Sunday will be the last day that these unique tours will be offered. Visits also took place last weekend.

“These mineral salt deposits can only be seen under specific winter conditions and we don’t know how long these formations will last this year,” Utah State Parks wrote.

READ: Protesters call for more action to protect the Great Salt Lake

Participants must register before Saturday at 5 p.m. Online registration can be found at Great Salt Lake State Park website. Tours will take place on Sundays from 10 a.m. to 3 p.m. and tour groups are limited to 20 people each.

Park rangers suggest wearing waterproof or waterproof boots, as the tour may include walking through deep mud.

In late 2019, a Great Salt Lake State Park ranger noticed the mounds on the north shore of the lake. The State Park Service said they build up when sodium sulfate-rich spring water hits the cold winter air.

In January 2020, just months after their discovery, geologists said they were commonly found on polar ice caps and on Mars. October 2019 was the first time they were seen – or at least officially documented – at the Great Salt Lake.

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Mary Cashion

The author Mary Cashion