Scree

To the north the towering scree-strewn slopes of Saddleback begin to draw nearer as we start the abrupt descent towards Keswick.

Source: wiktionary

Struggling down the slope, There's not much hope. I begin to try to ride the scree But the rocks are tumbling all around me.

Source: wiktionary

Sprawled prone among the rocks, the team waited for a reply to their request to fire. […] Occasional rounds zinged off the scree, each with a different pitch.

Source: wiktionary

Acres of the industrial port had been reduced to desolation, half-walls, half-chimneys, crazy sticks of steel that looped up out of concrete scree. The temptation not to clear and rebuild must have been strong.

Source: wiktionary