The key difficulty in the direct routes is a notorious band of shale near the summit, which presents rotten and dangerous rock.

I'm as anxious to get off this rotten rock as you are!

But the rotten rock crumpled under Spock even before he could climb down.

They climb onto a band of rotten rock, a tuff and lava composite that sometimes breaks right off in their hands.

With growing urgency Silverhair ground her way deeper into the rotten rock.

They found a great quantity of rotten rock.

Some of the rotten rock broke loose and tumbled.

His ascent ended at 7,300 m due to a 300 m band of rotten rock.

He hammered four of their makeshift pitons into the rotten rock and looped the rope through them.

If you walk against the flow you'll find yourself in a hell of rotten rock and mossy cliffs.