HOLL MALVERN HILLS. 81 



Schist about 4 yards. 



Gneissic rocks ,, 28 „ 



Interval „ 20 „ 



Granitoid rocks, massive and coarse-grained . . „ 90 „ 

 Gneissic and gneissoid rocks, both thickly and 



thinly bedded „ 37 „ 



Diorite „ 1 ,, 



Gneissic rocks, with coarse-grained massive beds „ 77 „ 



Gneissic rocks with hornblendic bands „ 75 „ 



Trap-dyke and fault „ 30 ,, 



The massive and rugged aspect of the granitoid rocks is partly due 

 to weathering" ; for when viewed in artificial sections, as along the 

 road from Malvern to the "Wych, it has a more gneissic appearance*. 



Beyond the rounded summit are gneissic rocks, followed by gra- 

 nite, then some diorite, again granite followed by gneissic rocks, 

 and on the west of the ridge a trap-dyke ; then granite, which is 

 again succeeded by gneissic rocks to the summit of the Beacon, where 

 the hill is crossed by a large trap-dyke. Some narrow bands of 

 hornblende- and mica-schist, and a bed of talc, are included in the 

 gneissic rocks at the summit. 



The trap- dyke may be traced in a north-westerly direction to the 

 quarry by the side of the high road, at the bottom of the ravine which 

 separates the Beacon from Summer Hill. Below the summit of 

 the Beacon, on its eastern side, it divides into two branches, one of 

 which runs down the ravine above Lady Huntingdon's Chapel, 

 while the other pursues a south-westerly course. Another large mass 

 of trap-rock occurs further down the same ravine, and four others 

 are seen in the ravines between EUersley and the town reservoirs, a 

 little above the Wych road. They occupy the slopes and bottoms of 

 the hollows, the ridges being formed by the granitoid and gneissic 

 rocks, and, near the roadside, by mica-schist. In the ravine above 

 the reservoir, about halfway up the hills, there is some diorite 

 passing into syenite. 



A belt of coarse-grained granite is in contact with the northern 

 margin of the trap-dyke which crosses the summit of the Beacon, 

 beyond which are other bands of more gneissoid granite, separated 

 by gneissic rocks, all having the same north-west and south-east 

 course. A bed of coarse-grained diorite, rich in hornblende, crosses 

 the rounded hill between the Beacon and St. Ann's Well, and on the 

 eastern side of this hill there is another eruption of trap, and a 

 second on its western slope. Other trap-dykes occur in the vicinity of 

 St. Ann's Well, and two more at the southern extremity of Summer 

 HiU. 



The largest mass of granite in the whole range occupies the 

 southern half of Summer Hill, directly east of the trap-rock, and 

 the northern slopes of the hill last mentioned, immediately west of 

 St. Ann's Well, and overlooking the pathway leading from Malvern 

 to West Malvern. It has the same coarse-grained structure, but is 



* See also Thillips, op. c!i. p. 33. 

 VOL. XXI. PART I. G 



