Lake Huron’s Thunder Bay National Marine Sanctuary is home to least 10 underwater sinkholes. Formed as groundwater eroded the limestone below, these pockets create conditions where cyanobacteria, which first oxygenated the planet, thrive.
On September 16, we’re teaming up with @InspiredPlanet-x6r and @FriendsofTBNMS to present a livestreamed exploration of this incredible underwater world.
Learn more at GreatLakesNow.org/HiddenBelow
#GreatLakes #LakeHuron #Prehistoric #Exploration #FreshwaterWorld #Science #Livestream
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