386 
The Hon. Mr. StRANgways on the 
(see fig. 10, PI. 25). At (), the limestone soon becomes very nearly 
horizontal, and forms a sort of natural pavement on the left bank of 
the river, where the contrast of the different colours which alternate 
in this and in many other places is very remarkable. This is 
attempted to be represented in the drawing, fig. 2, PI. 25, as well 
as the cubical fragments, which, when the beds are thus strongly 
coloured, and in some instances spotted with green and yellow, or 
red, resemble the remains of a tesselated pavement. The right bank, 
however, now claims our attention. 
Under the projecting point H , the strata, as on the opposite bank, 
vary but little from the horizontal line ; where they do, it appears 
to be occasioned by the faults or dykes, x and j, which cut them 
through as far as they are visible. The disturbance they have caused 
is but slight ; the dyke x has not displaced the strata on either side, 
as they may be traced at the same level by their colours, especially 
three of them, yellow, red, and green, which are brighter than those 
above and below. The beds rise gently on both sides towards this 
dyke. The dykey, however, has altered their position, as is proved 
by the three coloured strata, which are at least a foot lower on the 
right side of it than on the left, but they do not turn up towards it. 
These dykes are each about two feet wide, and are filled with 
diluvian gravel, of the same nature as that which covers the plain 
and cliff above ; part of the gravel in the dyke being softer than the 
rock, has been washed out by the water : if continued in a straight 
line, they must eross each other somewhere near H, but it is more 
probable that in reality they form but one dyke or fissure, not 
perfectly in a straight line. For although something like a con- 
tinuance of the dyke y is seen among the rubbish at % on the 
opposite bank, where the water from some wet land, under the 
heights J, finds its way between some bushes to the river, yet 
