Page:Transactions of the Geological Society, 1st series, vol. 1.djvu/318

 level ground, so that the rocks are no longer cut through. This level ground continues for a short distance, when a limestone ridge suddenly rises up, dipping west at an angle of about 40°. In the sketch No. 1, I have represented the appearance which these strata would exhibit, if a vertical section of them was made in a line at right angles to the direction of the Malvern Hills.



§ 49. It is worthy of remark, that although the coarse sandstone, found at the foot of the End-Hill in vertical strata, lies to the westward of the compact sandstone, as mentioned in § 47; it is not found in the section of the rocks I have now described; nor did I see it in any other part of this side of the range, except in the neighbourhood of Castleditch, at the distance of seven or eight miles to the south.

§ 50. The same argillaceous rock that occurs in this place is met with very frequently on the western side of the range. It is seen under different appearances; sometimes it is of a friable texture, resembling fullers' earth; in other places it contains a great deal of mica, and has a slaty structure; when in this last state, many impressions of shells, principally terebratulites are found in it; it also occasionally contains some calcareous particles, forming a kind of marle. When it is in the earthy state, and with the slaty structure less distinct, it very generally includes lenticular-shaped masses and balls of an argillaceous limestone, containing a few terebratulites, the shell of which is sometimes partly preserved and retains its pearly lustre. In one of these masses I met with a specimen of the orthoceratites. This argillaceous rock is found not only on the eastern side of the limestone hills, but also lies upon the limestone, and in conformable stratification with it.

§ 51. The limestone does not form a continued ridge; but for several miles along this side of the range rises up in different places,