View source for Old Red Sandstone of Shetland, Central outcrops

== North Mainland ==
A number of small outliers of folded and faulted, predominantly sandy sediments crop out along and close to the north-east coast of North Roe ([[Media:P915575.jpg|P915575]]). A rather larger outcrop forms most of the island of Gruney, 1.5 km N of the Point of Fethaland. This outcrop consists of a basal breccia overlain by conglomerate and arkose with thin beds of mudstone. These rocks may have been laid down ﬁrst as scree, then as alluvial fan deposits and ﬁnally as the channel and overbank deposits of swift-flowing rivers. They are to some extent comparable with some of the sediments of south-east Shetland, but if Pringle’s (1970, p.166)<ref name="Pringle">PRINGLE, I. R. 1970. The structural geology of the North Roe area of Shetland. Geol. Jnl, 7, 147-70.</ref> contention that they are older than the Ronas Hill Granite is correct, they may be of roughly the same age as the Walls Sandstone.