GEOLOGY. 3 
We now quote at length from Colonel Nelson’s paper :-— 
“ GEOLOGICAL DETAILS OF THE PRINCIPAL ISLANDS, IN 
GEOGRAPHICAL ORDER. 
“St. GEorGE’s Istanp.—The strata dip southward with 
considerable uniformity along the southern and eastern 
shores, which are protected from violent attacks of the sea 
by St. David’s, Smith’s, and Long-bird Islands; and by 
the reefs which bound the intricate passage into Murray’s 
Anchorage. 
“The north side is exposed throughout its whole length 
to the fury of a sea which has had, within the area of the 
north reef (at a distance of seven or eight miles), sufficient 
space to re-accumulate its destructive energies ; and exhi- 
bits in the cliffs a saddle or dome-shaped structure, the 
lines of lamination dipping towards every point of the 
compass. In one or two instances, the summits of what 
were once internal hills, are bared; and within a few square 
yards, the coats of this nucleus range round it with perfect 
regularity. As might be expected, this north side consists, 
in a great measure, of abrupt cliffs, and landslips brought 
down by the undermining of the waves. The sandstone on 
the summit of some of the hills is scarcely tenacious enough 
to hold: together; but from Mullet Bay to the Ferry, on a 
level of not more than twenty feet above the sea, the rock 
suddenly becomes a very hard, fine-grained, or compact 
limestone, in which scarcely a vestige of organic structure 
is visible, unless the stone be polished. 
“Just above high-water mark, along a considerable por- 
tion of the south side, is a stratum of calcareous sand, about 
six feet thick, apparently a distinct deposit from the rock 
above it. 
