A rock fragment larger than a pebble and smaller than a boulder, having a diameter in the range of 64-256 millimeters (2.5-10.1 inches), somewhat rounded or otherwise modified by abrasion in the course of transport.
Related terms:
A rock fragment larger than a pebble and smaller than a boulder, having a diameter in the range of 64-256 millimeters (2.5-10.1 inches), somewhat rounded or otherwise modified by abrasion in the course of transport.
Related terms: