As a whole, the Cantabrian Mountains are remarkable for their intricate ramifications, but almost everywhere, and especially in the east, it is possible to distinguish two principal ranges, from which the lesser ridges and mountain masses radiate.

Each valve has an umbo or knoblike protuberance from which 20 to 30 shallow ridges radiate to the margin at the other side of the shell.

Goat Fell may also be climbed from the north, where it is linked by a ridge to the subsidiary top of North Goatfell, a point from which three ridges radiate.

About twenty shallow ridges radiate from the apex of the cone to the margin which is smooth and unscalloped.

A few fine ridges radiate from the umbone and there is a sculpting of concentric growth rings.

Three main ridges radiate from the summit.

The apex is towards the anterior of the shell and fine ridges radiate from it.

Radial ridges radiate away from the center of Lamont, except in the east and west quadrants.

Sharp, prominent ridges radiate from the peaks to the northeast and southwest, along the main crest of the mountain range.

Low ridges radiate from this crater rim across the floor to the northeast.