468 



PEOCEEDINGS OP THE GEOLOGICAL SOCIETY. [May 24, 



Figs. 11-14. — Plans and Sections iUustrating the formation of 

 Escarpments. 



Fie-. 11. 



Fiff. 12. 



Fio-. 13. 



Fig. 14. — Section along the line y z. 



^U? 



