THE GEOLOGY OF THE FAROE ISLANDS. 251 
débris and loose blocks that were scattered about might not have had a true 
morainic origin, it was impossible to say, but from the presence of some blunted 
and evidently glaciated stones, this seemed highly probable. True terminal 
moraines, however, were noticed in the valley that leads down to Westmanns- 
havn, on the way over from the head of Kolfaredal. At Andafiord in Osterde, 
I found the till overlaid by true morainic débris and shingle, and all the low 
ground was sprinkled with large erratics which could not have rolled to their 
present positions, but are of unquestionably glacial origin (see Plate XV. fig. 20). 
At Klaksvig also may be seen erratics and morainic gravel and sand overlying 
till (see fig. 19). In Suderoe, as in the northern islands, numerous loose erratics 
appear, but morainic débris seems to occur in mere superficial sprinklings, and 
never, so far as I saw, formed definite mounds. So far as my observations 
went, well-marked terminal moraines appeared to be quite exceptional, but 
much of the loose angular débris and earth which are scattered over the bottoms 
of the valleys and the lower grounds are doubtless of morainic origin. It is 
needless to add that not a single erratic or loose fragment of rock foreign to the 
islands was observed. 
5. Lake-Basins.—All the lakes, with one or two exceptions, occupy true 
rock-basins. None, as I have already mentioned, attains a large size. They 
are somewhat numerous, and were formerly more abundant, for not a few 
appear to have been silted up, and are now represented by little sheets of 
alluvium and cakes of peat. As all the lake-basins we visited present the same 
kind of features, a few only need be specially referred to. 
The col between Kolfaredal and the valley that takes down to Leinum is 
only 259 feet (79 métres) above the sea. In the Leinum valley, a short distance 
below the water-parting, occurs a little lake (Mjavatn), and about half a mile or 
so further down is a second and larger lake (Storevatn). Myjavatn is divided 
by a céne de déjection of detritus brought down into the valley by a torrent 
escaping from the hills on the north side. The surface of the lake is only 12 or 
13 feet lower than the water-parting—the height over the sea being 75 métres. 
The lake is about quarter of a mile or so in length, and it appears to be shallow. 
Yet it is a true rock-basin, since the stream at its lower end flows over rock. 
Storevatn is three-quarters of a mile or more in length, and half a mile or 
so in breadth, and seems to be deeper than Mjavatn. At its lower end it is 
hemmed in by rock, over which the stream flows. The height of this lake we 
found to be 63 métres, or 207 feet. Roches moutonnées occur at the foot of both 
lakes, but only a thin sprinkling of angular débris is scattered over the valley. 
There are no true moraine mounds. Storevatn lies at the base of tolerably 
steep hills—the one on its north-west side being glaciated all over. The lake 
originally extended up the-valley to the north-west, and must at one time have 
been nearly two miles in length. 
