XI 
EXPLAXATJON OF IIORIZOXTAL SECTION OF RAILAVAY 
BALLAST OUAURY NEAR GOSFORD. 
Xo. 1. — E,ipp]e-marked sandstone and mudstone. 
No. 2. — Clay ironstone, very argillaecous. 
No. 3.— Hippie-marked tlaggy sandstone and mudstone. 
No. 4. — Eerruginons sandstone. 
No. 5. — E-ipple-marked tlag^y sandstom' and mudstone. 
No. 0. — Sandstone. 
No. 7. — Lcntieular l)and of pe1)bles, 2 in. in diameter. 
No. 8. — Laminated mudstoiu' and sandy shales, dark purplisli-e;r('y. Eisli 
and Laljyrinlliodont remains found here'. 
No. 9. — Laminated clayey-sandstone. 
No. 10. — -Sandstone, with lentieular hand of pehhh/s 1 to 2 in. in diameter; 
dai'k (piartz, jasperoid (piartz, white (piartz, greenisii fedsites (r), 
and mudstoiu'. 
No. 11. — Sandstone. 
No. 12. — L('ntienlar ;;’rey sluile. 
No. 13. — Sandstone. 
A'ertical scale, 10 feet to 1 inch. 
