dropstone
English
Etymology
drop + stone
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)
Synonyms
- (glaciology): erratic
See also
- lonestone