Geology of Northumberland and Durham. 



97 



Brought forward 



Thill 



Gray metal and post girdles 



Gray metal 



Coaly very pure splint ... 



Thill 



Blue stone 



Black stone 



Fine splint coal 



Coarse coal 



Dark gray metal with balls of whin 



Gray metal, rather hard 



Seamy post girdles with thin layers of metal 



Whin 



Seamy post 



Whin 



Gray seamy post with thin layers of metal 



Gray metal 



Coaly bright but tender ... ) 



Gray metal band > Yard coal 



Coaly coarse and seamy ... ) 



Thill 



Gray post 



Blue stone 



Black stone 



Gray metal with ironstone balls 

 Gray metal with post girdles 



Whin 



Gray metal with post girdles... 



Whin 



Gray metal with post girdles ... 



White post 



Gray metal with thin girdles... 

 Blue stone 



y Bensham seam 



Carried forward 

 ThirdSeries. Vol.3. No. 14. Aug. 1833. 



o 



