50 GEOLOGY OF THE CAMPSIE HILLS. 



Explanation of Plate I. giving a view of the Strata 

 at Murray'' s Hall, Campsie Hills. 



No. of the strata- Colour. Feet thict. 



1. Surface soil. 2 



2. Trap, columnar. Lead-grey. 60 

 S. Trap, amorphous. Rusty greyish-brown. 1 6 



4. A narrow line of trap much de- 1 ^^^^^ ^^^^^ ^ 



composed, J 



5. Amorphous trap, very compact. Dark blackish-grey. 3 



6. Sandstone. Light greyish-white. 3 



7. A narrow strip of slate-clay. Greenish-grey. 



8. Sandstone. Pale ash-grey. 8 



9. Slate-clay. Common lead-grey. 6 



10. Limestone. Bluish-black. 3 



11. Slate-clay, mixed with glance- \ Greyish-black and 



coal. i rusty-orange. 4 



12. S^dstone. Pale yellow. 13 



13. Slate-clay, containing narrow T Blackish-grey with 



lines of sandstone. / bluish-grey lines. 8 



14. Slate-clay. Blackish-grey. 17 



15. Limestone, containing entrochi 1 ^ 



and specks of pyrites. J 



16. Bituminous shale passing into "J Blackish-grey, with a 



slate-clay. i tint of green in it. 6 



17. Bituminous shale, containing cal- 



careous matter. The thick- 

 ness of this stratum is not 

 yet ascertained. 

 No. 18. is the entrance to the mine 

 by which the limestone No. 15. 



is wrought, -i— 



157 



" Blackish lead-grey. 



