GKOTJl' IN THE MALVEEN HlLLS. 539 



common among indurated rather flinty slates with little cleavage. 

 There are some smaller infiltration-veins of quartz (?). 



'* (2) East of the Herefordshire Beacon. — Belongs to a group of 

 rocks about which it is difficult to be certain. The ground-mass is 

 minutely cryptocrystalline, with small grains of epidote in cracks 

 and irregular clusters, and with numerous scattered grains of quartz 

 and felspar; these are generally rather ragged at the edge and 

 irregular in form. Here and there patches of the ground-mass are 

 more coarsely crystalline. The rock in some respects resembles 

 certain ' porphyroids,' examples of which occur at High Sharpley, 

 Charnwood Porest ; but on the whole I think it rather more like a 

 true quartz-felsite, and very likely an intrusive rock, 



" (3) Lilleshall Hill (quarry on S.W. side, on or near the 

 strike of the summit beds). — One of the indurated slate or Halle- 

 flinta group ; consists apparently of minute granules and perhaps 

 microliths of felspar and fibres of a pale greenish chloritic mineral 

 (showing bright colours with crossing Mcols) with a somewhat 

 parallel arrangement ; opacite and ferrite are scattered here and there 

 about the slide. The structure is not unlike that of some of the 

 flinty slates of Charnwood. 



^' (4) Nun^s Well, St. David^s. — One of the same group, but 

 perhaps a little more altered. The rocks seem to be full of excep- 

 tionally small microliths (some, however, may be fine fragments) of 

 quartz, felspar, and perhaps epidote." 



Discussion. 



Dr. Hicks quite agreed with the author in his conclusions as to 

 the Pebidian age of the beds in question. 



Mr. Keeping said that he had been much struck with the resem- 

 blance between the Salopian and Malvernian rocks during recent 

 visits to those districts. 



