260 



Rev. James Yates on the Structure of the 



strata of calcareous breccia repose upon it*. Near Bedvvorth it crops out 

 and dips one foot in three. It is worked by means of a shaft 43 yards deep, 

 passing through beds of a light greenish blue colour^ stratified conformably to 

 the limestone underneath, and all abundantly impregnated with calcareous 

 matter^ but approaching either to clay-slate or to sandstone according to the 

 proportion which they contain of soft clay or of siliceous particles. Mr. Pin- 

 kerton's pits are from 23 to 30 yards deep, the strata dipping 1 foot in 10. 



The coal formation of this district borders immediately upon the limestone, 

 which has now been described. It seems to lie in a narrow trough passing 

 southwards to Wyken and Sow near Coventry, and northward by Baxterley 

 and Baddesley Ensor to Polesworth f . The dip of the beds of coal corre- 



* The map and section, PI. XXVI. fig. 1, 2, are intended to give an idea of what I conceive 

 to be the relative position of the various rocks of this district. I am informed that limestone is 

 found at Baddesley, Kingsbury Wood, Whateley, and Cliff, which lie towards the north-west^ 

 beyond the limits of the map. In sinking wells about Whateley, large masses of galena rich in 

 silver have been found in a limestone stratum. Dr. Power of Litchfield, to whom I am indebted 

 for this information, had a mass weighing 17lbs. 



+ Dr. Power has furnished me with the subjoined table of the strata at Polesworth Colliery. 



yds. ft, in. 



1. Soil and Clay 12 1 6 



2. Rocky brown Clunch. . . 4 



3. Smut 6 



4. Fire Clay 2 2 6 



5. Pimply 2 10 



6. Bind 3 



7. Bind, and Balls of Ironstone 110 



8. Blue Bind 110 



9. Ell Coal, and Batt ... 116 



10. Fire Clay ...... 100 



11. Blue Bind 4 2 



12. Rock 8 10 



13. Upper Sough Coal ... 026 



14. Clay and Clunch .... 110 



15. Rock 10 



16. Coal 3 



17. Fire Clay 2 



18. Bind 12 9 



19. Black Clod 8 



20. Ironstone Bind 3 2 8 



21. Ilalf.yard Coal and Clod . 2 



22. Fire Clay 2 3 



23. Rock 10 4 



yds. ft. in. 



24. Ironstone Bind .... 328 



25. Slate Coal 2 13 



26. Fire Clay and Pimply . . 2 10 



27. Scurry 4 3 



28. Bind and Slums .... 216 



29. Smithy Coal 2 4 



30. Pimply 4 2 



31. Black Clod and Ironstone . 10 2 



32. Stone Coal 10 



33. Fire Clay 12 



34. Mainstone 10 



33. Blue Bind 3 



36. Ironstone 10 



37. Blue Bind 2 6 



38. Rystone 8 



39. Blue Bind 3 



40. Thin Coal 18 



41. Soft Fire Clay 3 



42. Strong Bind 7 



43. Main Coal 2 



99 1 5 



