It is the unconsolidated or loose covering of fine rock particles that covers the surface of the earth.

Then there was a couple of years' worth of mixed rock particles.

The principal waste-waters associated with mines and quarries are slurries of rock particles in water.

In an aquifer water occupies open space (pore space) that lies between rock particles.

Mine the ring where it will pass overhead, attach the nuke to a large rock particle.

"You just plant the nuke on a rock particle and come straight back."

The rings of Saturn are made up of small ice and rock particles.

Beach pebbles are formed gradually over time as the ocean water washes over loose rock particles.

These pebbles are formed as the flowing water washes over rock particles on the bottom and along the shores of the river.

Most generally, it is the ability of moving water (flowing or waves) to dislodge and transport rock particles.