234 
Mr. Weaver on the 
ranging north-west and south-east, and dipping 10° to 15° toward 
the north-east. Beds of this description, but in many places 
much contorted, line the beach, until on approaching the town of 
Skerries they acquire a range of 15 Q south of east and north of 
west, dipping toward the north-east. They now gradually rise to 
the vertical position, and at last acquire an opposite inclination, 
the south-west. From hence the beach exhibits only sand; but on 
the southern and eastern sides of the peninsula of Skerries, similar 
rocks are laid bare, ranging east and west, and dipping 30° south. 
§ 127. From the different bearings observed in the direction of 
the beds on the coast, between the Delvan stream and Skerries, it 
is evident that they suffer several great inflections or curvatures, 
besides these which they display on the smaller scale. 
§ 128. The stratified rocks which occur between the green- 
stone headland on the north, and the cove beyond the Long Leg 
on the south, abound in layers and contemporaneous veins and 
strings of calcareous spar and quartz, both of which substances enter 
largely into the composition of the fine grained greywacke, con- 
jointly with clay slate, minute scales of silvery mica, and frequent 
finely disseminated particles of iron pyrites. The layers vary from 
less than one inch to twelve inches in thickness; the veins seldom 
exceed two or three inches in width; but both the calcareous spar 
and quartz occur either singly, or intermixed in these veins and 
layers. The appearances of some of these are very instructive, and 
tend to illustrate the doctrine of contemporaneous formation. The 
broken state of the coast exhibits frequent sections, both vertical and 
horizontal, in which these relations maybe studied; and the same 
vein may frequently be followed with the eye to its termination, 
both in the horizontal and vertical direction. In the annexed 
sketches copied from nature, on this part of the coast, Plate 13. fig. 
