dropstone
Noun
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Noun
dropstone (plural dropstones)
- (geology) An isolated fragment of rock found within a sedimentary rock (that had fallen, rather than being carried along)
- (glaciology) An isolated rock that is geologically distinct from the surroundings indicating that it was carried from a distant area and then dropped in place (by a melting glacier), an erratic
- (glaciology) erratic
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