It is not uncommon for large boulders to break loose, and significant rockfalls are not uncommon.

He looked around the butte for boulders to drop over the side, but found none.

Watch out for any unstable cracks or boulders.

An image came into her mind: titanic forces battling, with mountains for boulders to hurl at each other.

Having done that, he went outside to search for boulders he could use to block the entrance to the cave.

The only saving grace Creslin can see is that the man carries a broadsword big enough to use as a lever for boulders.

On a newer rating system for boulders, the Harlem boulder runs from V-0 to V-10, at the upper end of the scale.

He doesn't have to send out for boulders.

He had been so pleased with himself when they'd found the one that he hadn't checked the area thoroughly for other camouflaged boulders.

It is also used for wallstone, decorative boulders, natural steps and other landscape features.