26 



THE BRISTOL COALFIELD. 



BBOTION OF THE BRISTOL COALFIELD. SHOWING 

 ri<>\- OF THE CHIEF DEPOSITS OF GRIT. 



D xal. B 



1 THICK- DEPTH 



NESS IN 

 OF BEDS. SECTION. 



FEET. 1 I I T. 



| PER 



CENT. 

 ! OF 

 'SIL'CV. 



Argillaceom Bed 



Pennant 



Francomb Stone 

 Millgrii Stone .. .. 

 Rag Stone . . . . 



Rlack Vein Stone 

 P»rrot Ston» . . . . 



Hoimes Rock 



970 



Hara Vcntiiio Bt ne.. 



End of Coal-Measnres 



Millstone lint 



k terona l.iuoc- 



• 



45 



BOO 



'-', 04 



3,8-)0 



5,480 



5,754 



82-66 



89' 13 



to 

 84'9 



90-70 



728 



890 



9733 



94 8S 



-i.v. 



943 



911 



to 



985 



