784 B. N. PEACH AND J. HORNE ON THE 
Fig. 1— Vertical Section of | Kast Quarff, on the hills to the north 
Old RedSandstone strata of the bay and to the south towards 
on east side of Shetland. Fladabister ; while still another loca- 
lity is met with near Loch Spiggie in 
Dunrossness. In each of these loca- 
lities the breccia varies in character 
according to the nature of the under- 
lying rock. 
‘ F In the bay west of Brenista Ness, 
: Rees ue: the SSE series of the Brenista 
Flags is thrown against the breccias 
and underlying schists by a fault 
which is traceable inland in a N.N.W. 
direction. This series consists of 
well-bedded red flags, which persist- 
; ently dip to the east till Gulberwick 
-| Lerwick Sandstones. Bay isreached. The fault just referred 
2 to, when traced inland, always throws 
the flags down against the basement- 
Rovey Head Conglo- breccia, and hence the actual super- 
a position is not satisfactorily seen in 
the neighbourhood of Brenista. Be- 
tween East Quarff and Fladabister, 
however, the one group may be seen 
Brenista Flags. resting conformably on the other; 
: and, in addition to this, we find that 
the basal breccia, which forms vertical 
cliffs on the coast-line about 200 feet 
high, thins out inland till there is 
© | Basement Breccia. only about 8 feet of breccia between 
the underlying schists and the over- 
lying Brenista Flags. In some in- 
stances the breccia disappears alto- 
gether, and the Brenista Flags rest 
directly on the schists, a fact which 
points to the gradual submergence of the area. 
Returning to the shore-section north of Kast Quarff, there is a 
gradually ascending series from the Brenista Flags to certain coarse 
conglomerates seen in a smal] stream at the head of the bay of Gul- 
berwick, which are totally different from the basal breccias already 
described. Not only are the enclosed pebbles well rounded, but to 
a large extent the stones are composed of different materials. 
These beds are traceable up the slope of the Gulberwick hollow, 
to the road between Lerwick and Scalloway, where they form crags 
on the hill face, and where they may be seen in small quarries by 
the roadside. They may be followed also across the hills north- 
wards to Rovey Head, about two miles north of Lerwick, where they 
are brought into conjunction with the schists by a fault which is 
well seen on the shore. From Rovey Head southwards to the ridge 
overlooking the head of Fitch Dale, this fault forms the boundary- 
