broken pieces of bricks, stones, or other materials from demolished or destroyed buildings

small fragments of rock or pebbles, often found in nature or used as a construction material

grains of sand; grit

conglomerate (geology)

grit; gravel

(geology) glacial erratic; a rock transported by a glacier

rock fragments between 2 and 64 mm in diameter ejected during a volcanic eruption

a heap of broken bricks, stones, and debris from destroyed buildings

a type of coarse sandstone traditionally used for making millstones