A quarry is where granular material has been excavated.
Construction aggregate , or simply `` aggregate '' , is a broad category of coarse particulate material used in construction , including sand , gravel , crushed stone , slag , recycled concrete and geosynthetic aggregates . Gravel [ ˈɡrævəl ] is the study of rock fragments that have a general particle size range and include size classes from granule - to boulder-sized fragments . Gravel is categorized by the Udden-Wentworth scale into granular gravel ( 2 to ) and pebble gravel ( 4 to ) . A quarry is a place from which dimension stone , rock , construction aggregate , riprap , sand , gravel , or slate has been excavated from the ground .