Time, water, and geologic forces have converged to create underwater sinkholes where oxygen-poor and sulfur-rich groundwater support prolific microbial mats resembling life on early Earth.
MLive - GrandRapids/Muskegon/Kalamazoo on MSN4mon
Lake Huron state park at former limestone quarry could get campground, expanded trail usesALPENA, MI – A state park on the shore of Lake Huron could get major upgrades ... quarry and ghost town alongside rock ...
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