GEOLOGY, BY DOCTOR BOASE.
The rocks of this parish, like those of Gwinear adjoining, belong to the prophyritic series; the northern part is covered with hillocks of sand, a considerable portion of which, as on some part of Gwithian, has been drifted from place to place by the action of the wind; this to a certain extent is now prevented by a covering of arenaceous plants, the extensive fibrous roots of which form a loose spongy net work, which serves to retain the sand in its place. This sand was originally of marine origin, being at low levels entirely composed of fragments of marine shells; but inland, on more elevated places, a considerable portion of terrestrial
shell enters into its composition: these have been derived from the myriads of the snail tribe, which browse on the scanty herbage of these dreary Towans. The inland drifts, after a strong wind, will be found to consist almost entirely of the fragments of those land shells. On the coast this testaceous sand is in several places consolidated into calcareous sandstone; but this has taken place on a more extended scale in the parish of Crantock.
THE EDITOR.
This parish, like Guinear, has large copper lodes running through it, and elvan courses of an extraordinary breadth. Whele Alfred has been wrought on a larger scale than any copper mine so far west.
PILLATON.
HALS.
The manuscript relating to this parish is lost.
TONKIN.