Page:Transactions of the Geological Society, 1st series, vol. 3.djvu/346



IX. Sketch of the Geology of the South-Western Part of Somersetshire.

By LEONARD HORNER, Esq.

[Read March, 3, 1815.]

§ 1. leave to offer to the Society an account of some observations on the mineralogy of that part of Somersetshire which lies on the Bristol Channel westward of the river Parret. The shortness of my stay in the country prevented me from conducting my examination with that minuteness of detail which an accurate survey should possess, but I trust that with the assistance of the accompanying map and the series of specimens which I have deposited in the museum of the Society, the following notes will be sufficiently distinct to afford a general view of the geological structure of that part of England. I have distinguished in the map, by means of different colours, the situation which the several rocks occupy, and although, from unavoidable sources of error, the boundaries of each can only be considered as approximations to the truth, yet I do not conceive that the inaccuracy in that respect is so great as to affect any geological deductions.



§ 2. In the western part of Somersetshire, and partly within the adjoining county of Devon, there is a large district of high land, the greater part wild and uncultivated, extending about 30 miles from east to west, and about 16 miles between north and