and the Slrala, &c. in Derlyshire. 203 



10th Coal-sha'e and 1 lih Rock do the same; and the Ex- 

 cavation proceeds in the 1 Ith Coal-shale till near Slaveley 

 Bridge, when the 12th Rock is crossed, the 12th Coal-shale 

 is then pursued tor a short distance and the 12th Rock is 

 again crossed ; the Series is then descended, through the 

 nth Coal-shale and Rock, the lOih and gth to the 8th Rock 

 on the \W of Driinmingtnn, laid hare by the Calow and 

 Bull-Cose Denudation, see page 163; after which the 

 Series is ascended aijain in like manner by the channel of the 

 River to the 10th Rock, above VVildens-rnill, and in this 

 Rock the Excavation proceeds up the Trough bctvvecn Ches- 

 terfield and Hadv,to the i'ridge on the London Road above 

 Chesterfield, having, opposite the Iron - Furnace, cut 

 through the Rock and exposed the pth Coal shale for a short 

 distance : from the Bridge last mentioned as far as Park- 

 House Mill above North Winfield, the 10th Coal-shale is 

 followed, the Rother taking its rise on this same Stratum 

 at Littleworih near Siretton. 



The Hipper River falls into the Rother at the SE end of 

 Chesterfield, on the lOth Grit Rock, in which it continues 

 to be excavated for -| to , then the C);h Coal-shale f<ir about 

 the same space, then the Qth Rock, the 6th Coal-shale, and 

 so on, descending the Series to near Holv-moor-sidc, where 

 the 4lh Grit Rock is crossed, the Excavation then pursues 

 the 3rd Coal shale for % m., and then cuts throuch the 3rd 

 Grit, and takes its rise on the 2nd Coal-shale on the W side 

 of Harwood-Grange in Bcelev. 



The Dolee River falls into the Rother near Haeue, below 

 Staveley, on the 1 1th Coal-shale; its Excavation cuts 

 through the 12th Rock below the Aqueduct Bridge of the 

 Chesterfield Canal over this Rivt-r, which stands on the 12ih 

 Coal-shale; at Netherthorp it cuts through the 13th Rock, 

 and pursues Coal -measures which T am not thoroughly ac- 

 quainted with, to Sutton Water-Mill, from whence it fol- 

 lows nearly the course of the great zigzag Fault for some 

 distance (see page 1C2), and then leaves it on its E side; 

 on the SW of Heath Church the 13th Rock is again cross- 

 ed, and the 1 3th Coal-shale, and the 12lhRock is pursued, 

 until it terminates abruptly at Siainsbv Waier-Mill, where 

 the great zigzag Fault is again crossed ; and the Measuirs 

 which basset from under the yellow Lime are pursued by 

 the Excavation, the rise of this River beinc; near Over-Moor 

 on the Tibsbelf and Mansfield Road: about loOO acres in 

 Nottinghamshire to the eastward of this mam branch, 

 draining into it, as shown in the Map of Ridges facing 

 page 1. 



The 



