Saddle-shaped

1. a. Bent on each side of a mountain or ridge, without being broken at top; — said of strata.
2. a. Shaped like a saddle.
3. a. Bent down at the sides so as to give the upper part a rounded form.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.