Produced by or originating from geological processes within the Earth, as opposed to being created by living organisms.
From geo- + -genic (from Greek 'genos' meaning 'producing' or 'originating'). Used in environmental science and geology to distinguish Earth-origin from biogenic materials.
Geogenic arsenic in drinking water comes from natural geological sources rather than human pollution—a reminder that 'natural' doesn't always mean 'safe' for humans.
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