306 
Permian formation, but all below is of the Coal-measures. 
In the lower part of the marl are numerous fragments of the 
rock occurring below, which would appear to prove their 
unconformity, though the beds lay parallel one to the 
other, so far as can be seen in this section. Still further 
south we come to the tract of red sandstone, known as the 
Bed Rock of Rotherham. It extends several miles west of 
the limestone escarpment — to Rotherham and Aston. At 
North and South Anston, which are on the line of the 
escarpment, below the yellow limestone, there is a coarse 
variegated sandstone, which is occasionally a deep red 
colour, and below that shales and coal. About a couple of 
miles further, the junction of the sandstone and limestone 
is well exposed at Harthill, and just outside the boundary of 
the county, at Barlborough. It is there a coarse, thickly- 
bedded sandstone in the lower part, becoming finer and 
thinner in the beds higher up, and is separated from the 
limestone by beds of marl, all of a red colour. A section 
through the Limestone, and the strata below it, at Shire- 
oaks, east of Harthill, and on the Permian Escarpment, 
shows the relation the rocks bear to each other. It is as 
follows : — 
Ft. 
Ins. 
Soil and Sand 
6 
0 
Alternations of Light Eed Sandstone and Marl 
44 
0 
Magnesian Limestone 
90 
0 
Hard Blue Shale, with thin Limestone bands ... 
20 
0 
Blue Bind, or Shale 
30 
0 
Grey Sand Eock (Quicksand)... 
7 
0 
Fire-clay- 
2 
0 
Shale, with Ironstone 
4 
0 
Black Shale, with Ironstone ... 
1 
1 
Blue Shale 
4 
0 
Grey Sandstone 
6 
0 
Blue Shale, with Ironstone ... 
20 
0 
Coal 
2 
0 
Fire-clay 
0 
8 
Blue Shale 
15 
0 
Eed Eock of Eotherham 
200 
0 
