RASTALL : THE INGLETONIAX SERIES OF W. YORKSHIRE. 91 
immediately south of Horton Station, in the bed of the Ribble 
below Row End, and at Dow Gill and Town Head, east of the 
village of Horton. There is much drift and it is not possible 
to make out a continuous succession. On the whole the rocks 
exposed closely resemble those of Chapel-le-Dale, being chiefly 
grey or greenish fine-grained grits. The slate bands which 
presumably exist are scarcely exposed, since they have been 
denuded into hollows, which were subsequently filled up with 
drift, so that the rock-types seen are probably not representative. 
The grits are so similar to those of the other area as not to require 
separate description, but at the sharp bend of the river at Row 
End there occurs a peculiar conglomeratic rock, which is of some 
interest. 
The most continuous exposure in this area is perhaps that 
in the railway cutting, and it is generally stated that the beds 
here are rather more calcareous than usual ; a band three or 
four feet thick occurring in one place is described in the Survey 
Memoir as a limestone. There is also a very good example of a 
crush-breccia, consisting of angular fragments of the grits em- 
bedded in crystalline calcite. 
The structure and relations of the beds seen at Dow Gill, 
to the east of Horton, have been frequently described. Here 
are to be seen Ingletonian slates and grits associated with 
fossiliferous Coniston Limestone. The latter appears to be 
conformable with the Ingletonian series, but the succession 
is much complicated by small faults, and the true relations have 
not yet been ascertained. For our present purpose the only 
important point is that Ingletonian beds do occur in this valley, 
having nearly the same strike, and lying just where we should 
expect to find them, judging from the lie of the strata in the 
Chapel-le-Dale valley. 
Petrographical Characters. 
Although the lithological characters of the Ingletonian 
rocks have been referred to by many writers, the published 
descriptions appear to be based on examination of hand specimens 
alone, and the microscopic characters do not seem to have been 
investigated, with the exception of a very brief reference by 
