50 Rev. A. Sedgwick on the Geological Relations and , 



The eastern boundary of the formation presents, on the contrary, hardly a 

 sin"-le object of any mterest; and in the greatest part of the range from Not- 

 tingham to the coast of Durham, the superincumbent beds of the new red 

 sandstone make no escarpment whatsoever. Under such circumstances (espe- 

 cially when the country is disguised with diluvial rubbish), it is frequently 

 impossible to determine the precise boundary between the lower and the 

 upper formation. To this line Mr. Smith's county maps give us the nearest 

 approximations. The following short and imperfect notices are all which I 

 have it in my power to add on this subject. 



The southern extremity of this line commences (as above stated) close to Radford, and for 

 some way appears to range on the west side of the rivulet. North of Basford it crosses to the 

 east side, and is nearly defined by a chain of sand hills, which ranges parallel to the rivulet as far 

 as Newstead Abbey. Close to that place the line deflects more than a mile towards the west, then 

 runs nearly due south as far as Annesley Park, near the southern extremity of which it again 

 bears towards the north, and passes round the south-west side of the village of Annesley. A 

 great spur of the forest sand here passes over the whole breadth of the magnesian limestone, and 

 is seen in situ in the village close* to the escarpment of the lower formation. The western 

 boundary of this spur of the forest sand passes a little to the east of Annesley Woodhouse and 

 Kirkby Woodhouse, and joins the undulating line of the sand hills, which range close on the 

 south-east side of Mansfield. From thence the line ranges some way to the north-east; but after- 

 wards, in consequence of the incoherent nature of the forest sand, the valleys of denudation, and 

 the accumulations of diluvial gravel, it cannot be ascertained with any precision. Smith's line, 

 which passes to the east of Mansfield Woodhouse and Sookholm, and to the west of Warsop, 

 Cuckney, and Welbeck Park, is only an approximation. 



The range is afterwards somewhat better defined, and passes a little to the west of Sloswick, 

 and to the east of Radcliff", Darfould, Worksop Lodge, and Huggin-field ; near all which places 

 there are limestone quarries. The line then crosses to the north bank of the Worksop canal at 

 Woodnook ; and, in consequence of a projecting ridge of red marl, passes along the north bank 

 to a place opposite Shire-Oaks ; there it sweeps round the low projecting ridge of red marl, and 

 passes on the west side of the village of Gateforth. Its range from Gateforth is very obscure ; 

 but it seems to bear nearly due north into a part of Cotterel Wood, and thence to the south end 

 of Carlton ; at which place the junction of the magnesian limestone and the sandstone is visible. 

 From this point of junction the line appears to bear nearly due north through Carlton ; near the 

 northern extremity of the village crosses to the east side of the great road, and afterwards ranges 

 considerably to the east of it as far as Tickhill, which is close upon the line of demarcation. So 

 far the chain of sand hills, which commences near Nottingham, atfords a general indication of the 

 eastern limit of the inferior formation ; but in its further range towards the north we are deprived 

 even of this imperfect guide f. 



* In a single spot on the south side of Annesley, the superficial breadth of the magnesian lime- 

 stone formation disappears; and an ill-defined escarpment is partly composed of the limestone, 

 and partly of forest sand. This projecting ridge of the forest sand is not noticed in the geolo- 

 gical map of Nottinghamshire. 



t At the village of Carlton the boundary line of the forest sand is thrown too much to the 

 east in the geological map of Nottinghamshire. The extension of the forest sand into Sandbeck 

 Park (as represented in the same map,) is, 1 think, erroneous. 



