The shelter was nothing more than a rock ledge with some loose boulders near the bottom.

Only by an amazing effort did The Shadow keep from going with the loose boulder.

Through the netting Tom could see huge pieces of rock crashing down, knocking loose other boulders and earth.

She moved off in the direction he indicated, her horse picking his way among the loose boulders in the wash bottom.

It was leaning against one of the few loose boulders in the cave.

It was a vast level plain, but ridged, and covered with small, loose boulders.

Looking around, he found a loose boulder that appeared adequate.

It's difficult to find large loose boulders in these tunnels.

The loose boulders were often ten or twenty feet high.

With riprap construction, loose boulders absorb the force of the waves.