Mr. Horner on the Mineralogy of the Malvern Hills. 295 



the strata are very highly inclhied, and dip to the east. In the 

 spaces that intervene between large masses of the granite, there is 

 a rock composed of hornblende and mica, with somewhat of a slaty 

 structure and a loose friable texture. It is intersected by veins, 

 which are sometimes very slender, and in that case they consist of 

 red felspar ; but when the same vein becomes wider, it is found to 

 /Contain the usual component parts of granite. These veins are dis- 

 seminated irregularly through the mass, the line of separation is very 

 distinct, and there is no mutual penetration of the two rocks. 



§ 26. On the south-east side of the North-hill, and at the entrance 

 of the valley above Great Mahem, which separates that hill from 

 the Worcestershire Beacon, there is an aggregate rock consisting of 

 small angular and rounded fragments of quartz and felspar, cemented 

 by a ferruginous earthy base ; the whole in a decomposing state. It 

 occurs in the lower part of the hill, and is probably produced from 

 the disintegration of a granite, the mica of which has been chiefly de- 

 composed and has afforded the cement. Above this aggregate rock, 

 the hill consists almost entirely of granite, in which the materials are in 

 some places so disposed as to give the rock somewhat the appearance 

 of gneiss. It is fresher than most of the rocks in these hills, that 

 is to say, it is less disposed to break into irregular fragments with 

 decomposed surfaces. It sometimes contains veins of epidx)te, and in 

 one instance I found in it a slender vein of calcareous spar. Subor- 

 dinate portions of a mixture of hornblende and felspar occasionally 

 occur in it, and sometimes the hornblende, felspar, quartz and mica 

 are combined in equal proportions, forming a uniform mass. In 

 this part of the hill, I also met with a hne-grained rock, consisting 

 of quartz, felspar, mica and granular epidote, traversed by a narrow 

 vein of granite. 



§ 27. The upper part of the Worcestershire Beacon is composed 



