Unst, Yell and Fetlar are part of which island group?
Fetlar to the south are the Out Skerries and Whalsay. There are three island names in Shetland of unknown and possibly pre-Celtic origin: Fetlar, Unst and Yell. The earliest recorded forms of these three names do carry Norse meanings: "Fetlar" is the plural of "fetill" and means "shoulder-straps" "Omstr" is "corn-stack" and "í Ála" is from "ál " meaning "deep furrow". However these descriptions are hardly obvious ones as island names and are probably adaptations of a pre-Norse language. This may have been Pictish but there is no clear evidence for this. Haswell-Smith suggests a meaning of "prosperous land" and that
Unst and Fetlar are mainly formed of ultramafic and mafic igneous rocks which are interpreted to form part of an ophiolite, a section of oceanic crust from the Iapetus ocean which was destroyed during the Caledonian orogeny. Unst was once the location of several chromite quarries, one of which was served by the now-disused Hagdale Chromate Railway from 1907 to 1937. Unst is the type locality for the mineral theophrastite, a nickel-magnesium variant of the mineral, (Ni,Mg)(OH), having been discovered at Hagdale in 1960. Ferries link Belmont on the island to Gutcher on Yell and Oddsta on Fetlar. The Unst Bus