in Yorkshire, Derhijshire, &c. 103 



Forest Gravel near or in the top of such patches, T con- 

 cluded all such to be, and have described them as aliiivia, and 

 have in consequence, omitted to observe or notice, a most 

 important feature of the Yellow Limestone Hock, or Rocks 

 rather, that of their having strata of Red Marl (sometinKS 

 holding Gypsum and other substances), ochry ciay, loamy 

 or founders' sand, &c. interposed between them, of very 

 variable appearance and thickness, but sometimes capable 

 of forming a feature in the Country, as we have seen to 

 the NW of Fairburn in Yorkshire. I will therefore here 

 mention the places in order, beginning S, near which I 

 suppose that the upper Yellow Lime Rock ends, and these 

 anomalous beds basset, with remarks, as I go along, of the 

 probable errors in my Derbyshire Report, in considering 

 tliem as alluvia, &;c. 



I am doubtful whether the Forest Gravel admits of 

 seeing the upper Yellow Lime Rock, anywhere south of 

 Mansfield in Nottinghamshire, (and probably the Red Clay 

 on the Liinestone at the sonth end of that town, of which 

 bricks are made, may belong; to these anomalous Heds ? and 

 so rnay the lower and regular part of the large patch of 

 Founders' or casting Sand, Report i. 464, Brick-earth, &c. 

 extending to the Brick-kilns SE of Skegby, Report i. 432, 

 that I have considered as nlltivia in my Report, owine; to 

 the quartz pebbles scattered on its surface), but it probably 

 appears at Mansfield-woodhouse, Warksop Park in Derby- 

 shire, Shfrebrook,Over-Langwith,Langwiih Lane, Walley- 

 Wood, (west of this, about l-^milcEofBolsover, a hummock 

 of Founders' Sand and red Brick-earth occurs, \V of the 

 Turnpike Road, Derb. Rep. i. 135, 463 and 452), Walley 

 village, Bonbuck E (Nott«.), Crag-Mill, (west of these j- 

 Founders' Sand at Frithwood-Farm, and on Elmton Com- 

 mon, Report i. 464 and 137) ,Whitwell E, (Rcdhill, of loamy 

 gand with quartz on it, Report i. f42), Steetlev, Shireoaks 

 Park in Notts. Wood-niill, Yorkshire, (Sand and Brick- 

 earth in Thorpe-Salvin, by the Cliestcificld Canal, Report i. 

 141 and 4.52), Gi'ding Wells, Letwell, Roch-Abb'ey E, 

 Brailhwell (the Fullers' Earth at Raddle-l^its, Report i. 46.'), 

 probably belongs to the anomalous beds of the Marl), Ed- 

 hngton, Brodworth E, (Sand and Loam near Redhousc on 

 the York Road, and Founders' Sand near Flutton Pairuell), 

 \Ventbridge VV, (reddish Clay in the north HiH, in the York 

 Road), Greave-Park SW, (Clay on a remarkable small Com- 

 mon by the York Road, SE of Pontefriict, called the Devil's 

 Bowling-Green), Knottingly E, (here I am informed, that in 

 tutting a canal near the Air River, Red Marl and Gypsum 



were 



