Sinkhole microorganisms constantly affect the lake environment by gathering and ... Dolomite: Sedimentary rock composed of calcium magnesium carbonate. Eukarya: Domain of both micro- and macro ...

"Sinkholes are most common in what geologists call, 'karst terrain'," the US Geological Survey explains. "These are regions ...

Mysterious holes in Lake Michigan! Caitlin Zant of Wisconsin's Shipwreck Coast believes they may be created by glaciers. Brendon Baillod, the man who found them, suggests it's a cause of warmer water.

Among its most renowned features are the Blue Lake and the Umpherston Sinkhole, a limestone cave that has been transformed into a "sunken garden" with lush vegetation and intriguing rock formations.