204 Mr. Farei/s Jccount of the Rivers 



The Idle is a River of Nottinghamshire and Vorkshire, 

 which falls into the Trent at Slockwith, having several 

 heads or principal hranches, four of which rise in Derby- 

 shire upon the yellow Lime, and continue upon the same, 

 until tlicy quit tiie Conntv, soon after which they each en- 

 ter the Siierwood Gravel : one of these streams, which rises 

 on the E of Bolsover, passes through a curiously excavated 

 Valley in the Lime, called Markland-Gripes, on the NE of 

 Elnjton, see page 68, and through another in a lifted part 

 of the vellow Lime, called Cresswcll-Crags,* adjoining Not- 

 tinghamshire. At Waliev old Furnace near Over-Lang- 

 with, a branch of the Palter is deeply excavated in the Lime; 

 and so is the Medon, about the Cotton-Mills at Plesley old 

 Foree : the Excavations for this last stream from Plesley up 

 to Hard wick Park and Teversall, and at Stoncv- Houghton, 

 lay bare the blue beds of Lime in blue Clay, belonging to 

 the yellow Lime Strata, see page 157, and so does the stream 

 first mentioned at Walls near Knitaker, Sec. : and the 

 branches of the Leen near Cinder-Hill in Nottinghamshire, 

 seem to do tlie same thing, see p. 452. 



The Eiewask River falls into the Trent at Barton-Ferrv, 

 in a wide Excavation in Red Marl, partly filled with sandy 

 Quartz Gravel : about a mile below Sandiacre, hills of Red 

 Marl commence on each side, and continue, with the Gra- 

 vel flat in the bottom of the Valley, to Staplef'ord-Mill, 

 where the great Derbyshire Fault (see page 146) crosses 

 this River, and its Excavation, which is then very wide, 

 proceeds in the upper part of the Coal Series greatly raised, 

 until somewhere about the Road from Ilkeston to Cossall, 

 where the ziuziig Fault also crosses (see pages 162), and 

 the Excavation then continues in lower parts of the Coal 

 Series, not vet completely explored, until opposite the 

 mouth of Golden- Valley at the NE corner of Codnor-park, 

 where it enters the skirt of a curious local Denudation (see 

 page 164), which in about a Mile it leaves again, and con- 

 tinues to ascend the series of strata until near Langton Hall 

 in Kirkby, Nottinghamshire ; where it again crosses the 

 zigzaf Fault, and the Excavation ascends the Coal Strata 

 bassetino- from under the yellow Lime, which also it at 

 lenffth intersects, south of Kirkbv, crosses its blue bed* 

 and Clav, and originates on the NE of Kirkby, near to the 

 edge of the Sherwood Forest Gravel. 



The Nutbrook Rivulet falls into the Erewash S of Trowel, 

 and has a wide Excavation in the upper part of the Coal 

 Series for % m., when it intersects and follows the line of 



• [This is now supposed, an iijiperKock; scemy present vol. p. 105.— Ed.] 



the 



