74 PEOCEBDINGS OF THE GEOLOGICAL SOCIETY. 



2. Bagged-stone Hill. — The next or Ragged-stone Hill consists 

 of two ridges, divided by a deep excavation which first runs south- 

 south-east and then south-east, the western spur being prolonged 

 further to the south than the eastern one. On the north the hill is 

 similarly divided by a shallower excavation into two spurs, the sum- 

 mits being united by a short transverse ridge. 



The mineral structure of these two crests or ridges is somewhat 

 different. In the quarry at the southern extremity of the eastern 

 ridge are beds of thinly laminated and crumpled mica- schist, some- 

 times rather quartzose, interstratified with greenish-brown and dark 

 greenish -grey schistose rock hanng a minutely foliated structure*. 

 The beds have a north-west and south-east strike, and dip to the 

 north-east; but a little further along the ridge, after passing over 

 much brecciated white quartz, the strike is altered to north-north- 

 east and south -south-west. Beyond the quartz is some silvery mica- 

 schist, which is foUowed by dark-grey rock similar to that in the 

 quarry, but more granular in structure ; and, nearer to the summit, 

 a still coarser variety shows the commencing separation into horn- 

 blende and felspar. These dar'ier-coloured beds alternate repeatedly, 

 and are regularly interstratified, with beds of minutely granular red- 

 dish-grey felspathic rock, containing often microscopic spangles of 

 mica, at other times minute dark specks of some easily fusible mineral 

 aUied to hornblende. Some of this felspathic rock contains a large 

 quantity of silica, together with some hme and soda. In the transverse 

 ridge which connects the two summits, this rock becomes more argil- 

 laceous, and presents a speckled red and grey appearance and a 

 foliated structure, and has associated with it dark-green imper- 

 fectly laminated rock passing into hornblende-schist. The northern 

 slope of this ridge is crossed b^ a fault running north-north-west 

 and south-south-east, beyond which are gneiss and mica-schist. 



In the large quarry at the southern extremity of the western 

 spur, near the little hamlet of White-leaved Oak, the lowest beds 

 exposed consist of greenish friable schist, which resembles steatite- 

 schist in appearance, although diff'ering considerably in its chemi- 

 cal composition f. Above these are gneissic rocks of the same ill- 

 developed character as those seen in the quarries towards the southern 

 extremity of the Keys-end HiU., some beds containing mica and 

 others hornblende ; but neither of these minerals are cleanly or 

 distinctly crystallized. The dip is to the north of east at a high 

 angle, and against their iipturned edges the Hollybush sandstone is 

 seen resting, and dipping also at a high angle in the opposite direc- 

 tion. Beyond the quarry, nearly to the summit of the hill, the 

 rocks consist of greyish-green crumpled schists, either uncrystaUized 



* It is diiBcult to find distinctive names for all the varieties of the Malvern 

 rocks. Professor Phillips, in alluding to these dark-coloured bands, speaks of 

 them as " a sort of greenstone or serpentinous trap, more or less laminated, and 

 often veined" (Memoirs of the Geological Survey, vol. ii. pt. 1. p. 27). 



t This schist was examined by the Eev. J. H. Timins, and found to contain, 

 silica 41 "82, alumina and metallic oxides 35"90, lime 1"40, magnesia 7"81, &c. 

 There is, therefore, too little silica for steatite or talc, and too little magnesia for 

 serpentine. (Timins, in Uteris.) 



