human
Please generate a brief description of a spooky ravine in the wilderness with basalt and ground.
assistant
Roughly halfway between the top and bottom of Skeleton's Crook hill, this steep channel is made even more treacherous by the thick coating of hardened black glass that covers the ground and walls. Large bubbles of cooled lava have burst up to the surface in places, and a few are shattered, revealing fragments of razor sharp basalt.