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Proceedings of the Royal Society 
coarse red conglomerate, which face about due west. At E F there 
are hills reaching to a height of 300 feet above the sea. Between 
the cliffs B C and the hills E F, the distance is about one-third 
of a mile, and the ground between is so flat, that the sea at spring 
tides flows on to it. There is a meadow up to Dunans, the surface 
of which nowhere exceeds 20 feet above the sea. At Dunans, how- 
ever, there is a knoll of conglomerate rock, the top of which reaches 
to a height of 212 feet above the sea. 
The green-coloured dots indicate spots where boulders occur. It 
will he perceived that they abound on the hill-slopes at H and K 
facing the K. and N.W. They are almost all grey granite, pretty 
well rounded, and having a diameter from 5 to 7 feet. One boulder, 
out of about twenty which I examined, was of porphyry, with white 
felspar crystals in a basis of purple alumina. 
In the meadow or valley to the north of the hills GHK many 
boulders of grey granite are lying about. The largest I found was 
on Dunans Knoll, and on the side of the knoll facing N.W. 
To the south of the conglomerate cliffs at C, there is a trainee of 
conglomerate boulders (coloured brown), evidently derived from 
these cliffs. They form a line running about S.E. ; most of them 
are about 80 or 100 yards from the cliff, and one or two occur in 
the low ground about 200 yards from the cliff. 
Some of these boulders are buried in a mass of gravel (as shown 
in Plate II., fig. 1) 10 or 12 feet thick, lying on the edges of the 
vertical strata of dark-coloured clay slate. The pebbles in the gravel 
are chiefly grey granite and gneiss. There is a quarry at this place 
which shows well, a section of the gravel. In another part of 
the quarry, there is a bed of laminated clay, 4 feet thick, lying 
between the rocks and the gravel. The workmen in the quarry 
informed me, that they had seen sea shells in this clay bed, but I 
was unable to reach the bed to search for shells, on account of its 
inconvenient position. 
One of the conglomerate boulders lies against a rocky knoll A, 
which has apparently obstructed the progress of the boulder farther 
south. Several others lie to the S.E., in the meadow, as if tumbled 
off the agent, whatever it was, which carried them. 
The new railway from Oban to Dalmally cuts through a portion 
of the hill composed of dark blue slate rocks (see F, Plate I.). 
