GEOLOGY OF PART OF SOUTH DURHAM. 169 



BORING MADE AT WITTON PARK COLLIERY. 



Feet. In. 



1. — Fireclay, with iron nodules 5 9 



2. — Dark grey shale 2 



3. — White sandstone, with partings 6 3 



4. — Brown and grey shale, with partings 15 6 



5.— Grey sandstone, with partings 4 



6. — Grey shale, with sandstone girdles 9 9 



7.— Dark shale 1 5 



8.— COAL 4 



9.— Light shale 5 2 



10. — Dark shale, with ironstone nodules and water 13 



1 1 . — Grey shale, with sandstone girdles 5 8 



12.— Dark shale 1 9 



13.— COAL, mixed with stone 6 



14.— Dark shale 1 



15.— COAL 1 



16. — Grey sandstone 4 11 



1 7. — White sandstone, with shale partings 7 2 



18.— Blue shale 1 10 



19. — Grey sandstone I 1 



20.— Blue shale. 2 8 



21. — Black shale, with girdles 3 2 



22. — Strong grey shale 9 5 



23.— Black slate 4 



24. — Grey shale, with girdles 3 3 



25. — White sandstone, with shale partings 11 6 



26.— Dark shale 1 o 



27.— COAL 4 



28.— Dark shale 1 3 



29.— COAL 1 8 



30.— Fireclay 1 10 



31. — Blue shale, with girdles 4 n 



32. — White sandstone, with "whin" girdles and blue part- 

 ings 21 



33. — Blue shale 14 9 



34.— Strong grey sandstone, with shale partings 3 7 



35. — Blue shale 2 3 



36.— Black shale 3 



37. — COAL, with three inches of splint in the middle ... 1 8 



38. — Grey shale 2 7 



39. — Blue shale, with ironstone nodules 3 5 



40. — Blue shale, with sandstone girdles 19 6 



