306 Mr. Horner on the Mineralogy of the Malvern Hills. 



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 west- 

 ward 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 impres- 

 sions of shells, principally terebratulites are found in it; it also 

 occasionally contains some calcareous particles, forming a kind of 

 marie. Wheh 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 iis sometimes partly preserved and retains its pearly 

 lustre. In one of these masses I met with a specimen of the orthoce- 

 ratites. This argillaceous rock is found not only on the eastern side 

 of the limestone hills, but also lies upon the limestone, and in con- 

 formable 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. 



