full-face sand and gravel stratum

Sand and gravel stratum

Water-soaked sand and cobble stratum

assorted sand and gravel

Cement Stabilized Gravel Stratum

composite foundation and gravel pile

concrete faced sand and gravel rockfill dam

concrete slab and gravel rock-fill dam

core recovery from pebble-bearing and gravel-bearing rock formations

felt and gravel roof

freezing gravel stratum

Frozen Gravel Stratum

gravel and sand mulch

gravel and sand mulched field

Gravel and soil

Gravel Stratum

Gravel-cobble

great deep sand and gravel aquifer

grit and gravel in the channel bed