11. The Austin formation consists of recrystalized, fossiliferous, interbedded chalks and marls. 12. Both residual ice caps overlie thick layered deposits of interbedded ice and dust. 13. The Austin Chalk consists of recrystalized, fossiliferous, interbedded chalks and marls. 14. The Becraft Formation is a coarse limestone with occasional thin interbedded shale layers. 15. The sandstone and shale are interbedded and are red and gray in color. 16. The thickness of the group varies from of deltaic shales with interbedded sandstones. 17. Sandy siltstone and fine-grained sandstones are interbedded with the aforementioned rock types. 18. Dark cliffs of folded, interbedded shales and mudstones form wave-cut platforms. 19. The underlying substrate in the area is sedimentary interbedded shale, sandstone and limestone. 20. The underlying geology consists of interbedded Ordovician shales and sandstones with extensive slate outcrops.
