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Abstract
Carolina Bays are depressional wetlands in which molecular hydrogen has been discovered in the soil gas during the recent push for natural hydrogen research. There are an estimated 20,000 Carolina Bays within the Atlantic Coastal Plain, though molecular hydrogen studies are currently limited to a small number of these features within North Carolina. This study expands the geographic extent of Carolina Bay molecular hydrogen soil gas surveys. Molecular hydrogen was successfully measured in Carolina Bays within the southeastern coastal plain, with the highest recorded measurements in North Carolina and eastern Georgia. A connection between natural hydrogen and the Carolina Bays is likely present. However, the source of molecular hydrogen, as well as variables affecting soil gas concentrations, requires further exploration to evaluate the strength of this connection.