The southern part of Mainland, from Laxfirth Voe to Fitful Head a series of dark schists and slates, is found with subordinate limestones.
The metamorphic rocks of the rest of Mainland are principally coarse gneisses, micaceous and chloritic schists, quartzites, &c.; in these rocks at Tingwall and Wiesdale considerable beds of limestone occur, which may be followed across the island in a northerly direction to Yell Sound, and to Dales Voe in Delting.
Gabbro occurs in the peninsula of Fethland; diorite in Northmavine between Rinas Voe and Mavis Grind; and epidote-syenite in Dunrossness.
According to Dr Jakob Jakobsen, the name means the voe (waa) of the skollas, or booths, occupied by the men who came to attend the meeting of the ling, or open-air law court, which assembled in former days on an island in the Loch of Tingwall (hence its name), about 3 m.
Many large and fierce bears roam in the Valley of Voe, and when they can catch any of us they eat us up; but as they cannot see us, we seldom get caught.