Sometime last year I came across a word to describe layers of misty mountains. Fabulous! I thought. I'll remember that. And promptly forgot it.

Today I finally found it again: landskein. Robert Macfarlane tells us:

Word of the day: “landskein” — the weaving & braiding of horizon lines, often seen most clearly on hazy days in hill country.

We look out on the Tararuas. I see landskein all the time.

Misty mountains in various layer, across land over which there is a layer of mist.
Screenshot of original tweet.