292 



JR. D. Vernon — The Lower Coal-measures 



here. The rest of the horing was done hy diamond drill. Owing to 

 the indefinite, not to say mistaken, lithological descriptions the section 

 is somewhat misleading. Fortunately a small collection of cores has 

 been preserved, from an examination of which I have been able to 

 correct and supplement the section. The Kilburn Coal, the Wingfield 

 Flagstones, the Naughton, Alton, and Belperlawn Coals can be 

 identified. 



At 1110 feet deep, 25 feet above the Naughton Coal, there occurs 

 a well-marked shell-bed containing many dwarfed specimens of 

 Carlonicola acuta. 



1. 



AltoTi Coal. 



Gap. 

 Coal. 



CoaL 



Coal 



Belperlawn 

 Coal. 



FIRST GRIT. 

 Fig. 2 



WtTiTi- 



TTWWT .'zf-oln. 



Section I. 

 ,, II. 

 „ III. 

 „ IV. 

 ,, V. 



Scale 75 Itet to an \T\tk. 



Sh?.l.ej. 



UviiJeTclay, aTi3 GaTiIster: 



SiTiiJ stone. 



Sanely slvalg. 



General Section at Ambergate. 

 New Shaft at Kilbourne Colliery. 

 Water AVorks Shaft at Smalley, 

 Boring at Little Hallam. 

 Bormg at Ruddinsrton. 



At three horizons the term ' burr ' is used. The rock so described 

 is composed of numerous small spherulites of siderite set in a very 



