32 An Account of the Great Derbyshire Denudation. 



much less raised, perhaps, than any of the other tracts 

 which have been liere mentioned*. 



If we return to Allestry N. of Derby above mentioned, 

 and trace the zig-zag fault, through Little Eaton, West 

 Hallani, and Tlkeston in Derbyshire, Awsworth, Greasley, 

 Anneslev, Kirkby, and Dirty- Hucknal in Nottinghamshire, 

 AU-Hucknal, Bolsover, Clown, and Barlborough in Der- 

 byshire, Harthill, South-Anston, North-Anston, Dinning- 

 ton, &c. in Yorkshire, we shall find coal-measures on both 

 sides of it, through its whole length, except in two or three 

 instances, where the yellow lime strata at th« top of these 

 coal-measures abut against it for short distances, and be- 

 tween Allestry and Little Eaton, where the limestone- shale 

 below these coal-measures abuts on its W. ; but the rise is 

 very considerable and unequal on the N. and W. sides, 

 through its whole length, compared with the other sides, as 

 I have particularly shown in my Report to the Board, and 

 pointed out the great difficulties which this zig-zag fault 

 has presented, to the right understanding the entire of the 

 great Derbyshire and Yorkshire coal-field, by the many 

 very intelligent and able colliers who are found in it. 



The first, or outer raised tract, thus bounded by faults 

 (except, perhaps on the N. where my Survey has not ex- 

 tended), shows no very rapid dips or inclinations of the 

 strata, except in very limited spots, and presents on the 

 surface either the yellow lime rock, or the parts of the coal- 

 measures not very far beneath that rock, compared with the 

 whole thickness of these coal-measures. 



The great limestone fault (which has been mentioned 

 above) commences in the town of Cromford in Derbyshire, 

 in the first or upper limestone rock, and proceeds through 

 Middleton, Wirkswcrlh, Hopton, Carsington, Ballidon, 

 Parwich, Newton-Grange, and Thorpe in Derbyshire, Ham, 

 Blore, and Thornwood in Staffordshire, and joins the great 

 Derbyshire fault near Wooton (as above mentioned), with 

 which it coincides along the S. end of the Weaver Hills to 

 near Ramsor, where it again leaves this fault and proceeds 

 near Caldon, Water-Houses, Water-fall, Grindon, Wetton 

 Mill, S. end of Ecton Hill, near Gateham and Narrowdale 

 in Staffordshire, Wolfscote, Beresford, Hartington, Lud- 

 well, Pilsbury, Crowdycote, Dowall, Booth, Thirkelow, 

 Edge-end, Buxton Eaths, Black-edge, Dove-hole, crosses 



* And which perh?ps answers to the South-Wales Coal Basin Report, i- 

 160. — Editor. 



to- 



