the world > the earth > structure of the earth > constituent materials > stone > stony material > [noun] > gravel or shingle (20)
chesila700
A collective term for small pebbles, such as those of the sea-beach; gravel, shingle. (In early quots. also = a siliceous stone or pebble, with plural…
shilly1675
Gravel, shingle; (with plural) a pebble, small stone.