Underwater robot in Siberia's Lake Baikal reveals hidden mud volcanoes — and an active fault

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Sascha is a U.K.-based trainee staff writer at Live Science. She holds a bachelor’s degree in biology from the University of Southampton in England and a master’s degree in science communication from Imperial College London. Her work has appeared in The Guardian and the health website Zoe.

A robot deployed to the bottom of Siberia's Lake Baikal last summer captured footage of cracks and deformations caused by previously unknown mud volcanoes — and you can watch the discovery in a video below.

"In the North Baikal depression, which is limited by this fault, there have been strong earthquakes in the past," Lunina said in a translated statement. The footage shows layers of rock that were torn and forced up by eruptions of mud and gas-saturated fluids. Boulders appeared to have been"squeezed out" from below, and the dusting of clay and silt on top looked disturbed and porous, the researchers noted in the study.

As the AUV traveled to slightly shallower depths,"it became apparent that the entire steep slope was densely covered with mud volcanoes," the researchers added. Mud volcanoes normally wouldn't form at such shallow depths, because they require high temperatures and pressures, Lunina said in the statement.

 

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