Mr. Horner on the Mineralogy of the Malvern Hills. 305 



range, for the road at this place makes a turn towards the hill, and 

 on the left hand side of it, after proceeding a short way to the 

 south, there appear several thin strata also bearing N. and S. and 

 nearly vertical ; the slight inclination they have from that position is 

 towards the west. They consist of an alternation of a very compact 

 argillo-quartzose sandstone, and containing a few impressions of 

 terebratulites ; of another rock similar to this, but much mixed with 

 calcareous particles ; and of a limestone, which contains a great 

 number of the shells I have juft named. 



§ 48. Proceeding farther south, the road inclines towards the 

 west, and is cut through a compact, quartzose sandstone, similar to 

 that mentioned in the preceding section, and containing impressions 

 of madreporites and of terebratulites. It is here however mixed with 

 a considerable quantity of mica, has a slaty structure, and breaks into 

 rhomboidal fragments ; giving it very much the appearance of a 

 grauwacke slate. It occurs in thin strata, the bearing of which con- 

 tinues parallel to the direction of the range ; but they dip east at an 

 angle of about 60°. The road very soon turns to the westward, at a 

 right angle to its former direction, and as it is still cut through the 

 rocks, exhibits a transverse section of them; and in the space of 

 about a quarter of a mile, they display some very remarkable changes 

 in their mode of stratification. The inclination of the compact sand- 

 stone diminishes for some way as it recedes from the hill, but it again 

 begins gradually to increase : to this rock succeed thin strata of an 

 argillaceous limestone coated with a slaty clay, the inclination of 

 which becomes more and more considerable. Thin strata of an 

 argillaceous rock now appear, which very soon acquire a ver- 

 tical position ; they continue so for a short way, and then beq-in 

 to dip towards the west^ with a gradually diminishing angle of incli- 

 nation. By the fall of the hill, the road very soon comes upon 



2q 



