11. The Austin formation consists of recrystalized, fossiliferous , interbedded chalks and marls. 12. Both are flat-lying, fossiliferous formations dating from the Cretaceous Period. 13. Geologically the cliffs are of Tertiary age and are composed of fossiliferous limestone. 14. The Austin Chalk consists of recrystalized, fossiliferous , interbedded chalks and marls. 15. It consists of hard fossiliferous limestones reaching a thickness of 50 80 m. 16. The lower facies comprises the Peterborough Member, a fossiliferous organic-rich mudstone. 17. It is sculpted from fossiliferous limestone and measures. 18. The abundantly fossiliferous , nodular limestone at the base overlies the " calico ". 19. I have some samples of Ordovician fossiliferous limestone. 20. Its sediments are approximately 400 feet thick, and its upper layers feature fossiliferous invertebrates.