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#extremeecosystems

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💧🌏 Greg Cocks

A Crew Was Searching For Shipwrecks In Lake Michigan—But They Found Something Completely Different
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popularmechanics.com/science/e <-- shared media / technical article
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“ • A survey of Lake Michigan located at least 40 large craters on the lakebed.
• Initial studies highlighted the spots as unknown shapes, but additional research revealed the craters are filled with marine life.
• Researchers expect to investigate further, seeing how these craters formed and if they’re really sinkholes…"
#GIS #spatial #mapping #water #hydrology #groundwater #crater #sinkhole #bathymetry #topobathy #remotesensing #sonar #LakeMichigan #Michigan #research #GreatLakes #geomorphology #geomorphometry #ROV #ecology #ecosystems #cyanobacteria #WisconsinShipwreckCoastNationalMarineSanctuary #Sheboygan #Wisconsin #extremeecosystems #extremophiles #offgassing #hydrocarbons
@NOAA

A sonar image of a few of the sinkholes found at the bottom of Lake Michigan. Earlier this month, scientists with the National Oceanic and Atmospheric Administration Great Lakes Environmental Research Laboratory confirmed that circular depressions discovered in 2022 were in fact sinkholes. More than 40 have been found roughly 14 miles southeast of Sheboygan in the Wisconsin Shipwreck Coast National Marine Sanctuary.
ALT
A diver investigates the purple-colored cyanobacterial mats at the bottom of Lake Huron's Middle Island sinkhole. Discovered in 2010, Lake Huron's sinkholes have been a hotbed for research ever since.
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Purple-hued cyanobacterial mats cover much of the bottom of Lake Huron's Middle Island sinkhole. Discovered in 2010, Lake Huron's sinkholes have been a hotbed for research ever since. The finger-like forms are caused by gases bubbling up underneath the mat.
ALT
Researchers from the National Oceanic and Atmospheric Administration Great Lakes Environmental Research Laboratory prepare to deploy a remotely operated vehicle to explore the newly discovered sinkholes in the Wisconsin Shipwreck Coast National Marine Sanctuary. More than 40 sinkholes were discovered 14 miles southeast of Sheboygan in the sanctuary.
ALT
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