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Researchers have discovered a "pH minimum zone" that occurs at a depth of approximately 10-15 meters (~30-50 feet) in the Chesapeake Bay. During research cruises in August 2013 and 2014, researchers collected water samples repeatedly from a deep basin of the main Chesapeake Bay. The researchers measured oxygen, hydrogen sulfide, pH, dissolved inorganic carbon and total alkalinity. [Source: ScienceDaily]
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