Accordingly, upon our arrival, we found this head-land
composed of a different substance. It is a great mass of red whin-stone,
of a very irregular structure and composition. Some of it is full of
small pebbles of calcareous spar, surrounded with a coat of a coloured
substance, different both from the whin-stone ground and the inclosed
pebble. Here ended our expedition by water.
Having thus found the junction of the sand-stone with the schistus
or alpine strata to run in a line directed from Fast Castle to
Oldhamstocks, or the heads of Dunglass burn, we set out to trace this
burn, not only with a view to observe the junction, if it should there
appear, but particularly to discover the source of many blocks of
whin-stone, of all sizes, with which the bed of this burn abounds.
The sand-stone and coal strata, which are nearly horizontal at the mouth
of this burn, or on the coast, become inclined as we go up the course of
the rivulet; and of this we have fine sections in the bank. The Dean of
Dunglass is formed of precipitous and perpendicular rocks, through which
the running water has worn its way more than a hundred feet deep; above
this Dean the banks are steep and very high, but covered with
soil, which here is a deep gravel.
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