A dark brown mineral or coal-like substance formed from decomposed plant matter, found in peat bogs and ancient deposits.
Named after the Doppler region or named after Christian Doppler (physicist); '-rite' is a common mineralogical suffix meaning mineral or stone. Possibly from 'dapple' or a similar root.
Dopplerite is fossilized plant gunk that accumulated in ancient bogs—it's basically a time capsule of what a wetland looked like thousands of years ago, encoded in dark, crumbly mineral.
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