696 
bedded, and as a rule soft and crumbly: the lowest and 
uppermost are the only two that have any claim to persis- 
tency; the two middle ones, though here and there thick 
and striking, are quite as often wanting as not. 
The Oaks Rock ranges from Chevet Park, through Monk 
Bretton, Hoyle Mill, Wombwell, and Brampton, to Kilnhurst 
Station, south of which point it dies away. The Lowest 
and Middle Chevet Rocks are found at Ardsley, whence the 
latter runs to Cudworth Station. The Upper Chevet Rock 
may be traced from Upper Cudworth, by Ardsley and 
Uarfield, to Bolton-upon-Dearne ; after having been shifted 
by faults, it reappears at Denaby, and thence its outcrop 
makes a bold ridge along the east side of the valley of the 
Don, down to Thryberg Park. This sandstone again appears 
at Wickersley. 
Like the Woolley Edge Rock, these sandstones die away 
to the south ; I am as yet unable to say how they behave 
going northwards. 
Above the Upper Chevet Rock, is a four-foot coal, which 
has been worked at Shafton and Billingley; at the first 
place it is said to have been of fair quality, at the latter the 
lower part at least was very " druggy." I have traced the 
outcrop of this seam from Shafton to Th^berg, and at the 
few spots where evidence was forthcoming, it seemed to 
keep pretty much the same thickness. 
I have now pretty well exhausted my stock of informa- 
tion, for my knowledge of the measures above the Shafton 
Coal is so small as not to be worth giving; but, before 
leaving off, a word ought to be said about the striking rock 
so well shown in the neighbourhood of this town, and 
known as The Red Rock of Rotherham. This bed, which 
is a thick mass of coarse, red, purple, or salmon-coloured 
grit, has proved a sore stumbling-block to geologists, and I 
fear that I can as yet do no more than state the various 
