Geology of Northumberland and Durham. 



95 



Brought forward 



Thill 



Gray metal and post girdles 



White post with metal partings 



White post mixed with round whin balls ... 



White post with partings 



Blue stone 



Coal 



Thill 



Blue metal ... 



Coal 



Black slate 



Seamy post and post girdles, with blue metal 



Whin 



Post with thin partings 



Blue metal 



Coal 



Thill 



Black stone 



Thill ... ... . 



Gray metal mixed with post girdles 



Gray post 



Blue metal stone 



Black stone 



Coal 



Thill 



Black stone 



Coal 



Thill - 



Gray metal . ... ~ 



Post girdles 



Gray metal 



Whin 



Blue stone 



Coal 



Thill 



Blue stone 



Post girdles • 



Whin 



Gray metal 



Seamy post 



Whin 



Post 



Blue metal ... ; • 



Pudding stone 



Coal ... 



Carried forward 



