J. W. DAVIS ON A BONE-BED IN THE LOWER COAL-MEASURES. 



333 



Diagram Section of Strata to show Position of Bone-bed near 

 Bradford and Clifton, Yorkshire. 



J ft. in. 



1. Black-bed Coal 



2. Seat-earth 



3. Argillaceous shale 



4. Strong stono 



5. Galliard 



6. Strong stone 



7. White shale 



8. Coal 



9. White shale with thin coal 



10. Coal 



11. Arenaceous shale 



12. Blue shale with ironstone 



2 10 



3 



20 



13. Bone-bed 



14. Better-bed coal j 



15. Seat- earth or G-alliard \ 



16. Shales and Raggy stone . 



i m; mi 



17. Elland Flag-rock with partings of shale, -j .!_ J"l XZ 



200 



2a2 



