Bent to pick up a sharp-edged rock in each fist, and watched again.

The dead man, his head bashed and broken from being hauled across the rocky terrain, lay wedged between two sharp-edged rocks.

He teetered at the edge of the gorge, looking fron the sharp-edged rocks below to the weapons of those who pursuec him.

The cut marks could have been caused by sharp-edged rocks or flakes, many of which were found alongside the bones, Mr. Etler said.

He crawled into a crevice between two sharp-edged rocks a short distance from the side of the trail.

Beyond the transparent walls space-bright sunlight glared off sharp-edged lunar rocks.

Louis noticed a sharp-edged rock nearby, like a carefully flaked fist ax, that would crush Chmeee's skull.

They stood on a gently bumpy plain, covered with small sharp-edged rocks, all half-buried in dust.

The armor chafed, cutting into his back; his hands were cut in a dozen places from the sharp-edged rock.

The whole point of their utility is that each is a "sharp-edged rock" in locations where nature has not provided any.