h AT DURHAM. OO7 



jfesponds to that in the pit named Keepier, will 

 afford a more particular illustration of the coal 

 formation of this district. It contains all the rocks 

 occurring in the district, except limestone, which 

 is frequently found immediately below the soil, in 

 beds of considerable thickness. I have given both 

 the names applied to the various rocks by the col- 

 liers, and those employed by Werner and by Pro- 

 fessor Jameson in his System of Mineralogy. 



Section of the Coal-Formation at Durham. 













1 



s 



0 



NAMES. 



Thickness. 















["fat] 



CoLLIr RS. 



WhRNfcRIANT. 



Fath. 



Ft. 



In. 



1 



2 



| Soil, &C. - 





2 



c 



0 



3 



Broken post, - 



Much rent sandstone, 



1 



0 



0 



4 



Grey metal, = 



Very friable sandstone, 



1 



0 



0 



5 



Post, 



Sandstone, 



1 



0 



0 



i) 



Grey metal, 



Friable sandstone, 



1 



c 



0 





Whinstone, 



Greenstone, 



0 



3 



0 



7" 













8 













9 



1 











JO 

 11 



>Coarse post, 



Coarse sandstone, 



8 



0 



c 



12 

 \3 













14 „ 













15 1 













16 













17 













18 



>Fine post, 



Fine sandstone, 





c 



0 



19 













20 













21. 













