Quartz Rock of the Lickey Bill, &c. 
515 
At the south-east base of May hill, near Huntley, on the road 
from Gloucester to Ross, a few siliceous beds, exactly resembling 
the quartz rock of the Lickey, alternate with strata of coarse grau- 
wacke ; and on the summit of a slaty mountain called the Stiper- 
stones, a few miles west of Caer Caradoc and Church Stretton, there 
is a considerable mass of naked projecting ledges, composed of a 
coarse grained variety of this same quartz rock, which from the re- 
semblance of its internal structure, has been sometimes mistaken for 
the millstone grit of Derbyshire. The same opinion has been en- 
tertained also with respect to the quartz rock of the Lower Lickey, 
and it must be admitted that it is possible to select from each of 
these formations individual specimens, the resemblance of which to 
one another is complete ; but such resemblances are no proof of the 
identity in geological position, and I have before stated that the 
true place of the quartz rock we have been considering, appears to 
be towards the lower extremity of that series of depositions which 
are usually associated under the name of grauwacke formations.* 
* Pebbles resembling those derivative from the quartzose rock of the Lickey, are by no 
means confined to the central parts of England ; they occur also in Scotland and Ireland ; 
the Hon. Wm. Strangways has found them mixt with the diluvium and large boulders of 
Petersburg and Moscow'. He has also found a native rock at Olonetz, on the Ladoga 
lake, and another in Catherineburg, from which they may have been derived. The rock 
at Olonetz being adjacent to the transition strata of the neighbourhood of Petersburg, is 
probably referable, like that of the Lickey, to the grauwacke series. I have myself found 
them abundant between Basle and the south extremity of the Vosges, scattered over the 
surface of the low hills that lie on the east of Altkirk ; these are probably derived either 
from the neighbouring mountains of the Vosges or the Black Forest. 
