He was planning to add more, but his foot came down on a loose rock.

As Case came out with his men he grabbed a loose rock at the side of the opening.

Loose rock and snow fell towards us from our right.

A fall of loose rock warned me when he was about twenty feet away.

The body was on a dangerous slope of loose rock.

The mother reached down, picked up a loose rock, and stepped forward to do the same.

His horse stumbled on the loose rock and he went down.

Half way up, her foot slipped upon a loose, round rock.

Typically, loose rock and soil is placed over the top.

Some loose rock that had been traveling with the cloud was coming down.