aquafact

English

Noun

aquafact (plural aquafacts)

1. (geology) A boulder worn by running water that is too large to be rolled as a pebble, worn smooth on the upstream or seaward side and exposed top and with a sharp ridge on the downstream or landward side.
   • 2003, Andreas Aigner, Annals of geomorphology, page 445:

     […] its bisector is similar in orientation to the ridge of the seaward-dipping aquafact.