3 adjectives to describe ghylls

Then, while I wandered up the huddling rill Brightening with water-breaks the sombrous ghyll, 1820.

She heard the languid splash of ripples on the stones and the murmur of a beck in a distant ghyll.

The becks had shrunk in the shady ghylls and a thin white line was all that marked the fall where the main stream leaped down the Force Crag.

3 adjectives to describe  ghylls