1865.] POSTEE AND TOPLET DENTJDATIOjST OP THE WEALD. 



469 



Figs. 15-18. — Plmis and Sections illustrating the formation of 

 Bscarjwients. 



Fig. 15. — Section along the line v x. 



Fig. 16. — Section along the line yz. 



Fig. 17.- — Section along the line vx. 



Fig. 18. 





■■^ ' 







A 



'■//'.'■-'""'.'—— 



M ''"'"~-v\\ 



C 







;0-;:;-^li; 



-;-- "'''^'y^/\ 









-'"" /'' / 









"' ,--' 





great spread of brick-earth round Hadlow. The brick-earth there 

 is not let into pipes, because it rests on clay. 



The occurrence of great floods, as suggested by Mr. Prcstwieh*, 

 may also be due to the probable low winter-temperature during the 

 deposition of the higher gravels. The effect of a low winter-tem- 



* Proc. Royal Soc. for March 1862, p. 47; Phil. Trans, vol. cliv. 1864, 

 p. 290. 



