1111'; SUCCKSHION (M' I>i:i'()SITS. (J7 



Willi rcfcictict' to tlic (lilVm'iMieos in the iiIminc ln'ij;hts, 



it is to Ik' ohsci'ved tlmt llir iciract's lliciiisi'lvos slopo 



soiiu'wiial, and aic iiiioveu, ainl lliaL tlif principal U'ITuccm 



aro S(MiU'liiiu!.s c'()inpli(-'at<'il I'.v niimtr nncs (liviilinn; tlu-ni 



iiilit littlu stops. It is llins sonicwlial (lilliciilt to ohiuiii 



accinatc nicasiiiviiieiits. Tlicni seems, however, to he a 



general an;reeniGnt of lliese terraces, and this 1 havt; no 



douht will he I'oinid to prevail v«'ry extensively through 



out the lower St. Lawieiice. U will he seen that three (»l' 



the principal teiraces iit Montreal correspond with three 



of those at Muriay hay; and the foJlowinLi; facts as to 



other parts of (,'anada, ;j;leaned from the Kej)orts of the 



Survey and from my own ohservations, will serve farther 



to illustrate this : 



I'f.'t. 



Kfiii|itville, Hand and littoral sliolls 'J.'tO 



Winuliu.stfr, " " " .'{(HJ 



Keiiyon, " " " '270 



i,.)fkiLl, " '• " 2(54 & 2!t0 



llolilios' Kiills, Filzroy, sand and littoral HJiells .S.*)0 



Duiliam Mills, l)e L'lslu, " " " 28!> 



Upton 2.")7 



The evidence of sea action on many of these heaches, 

 and the accunndation of shells on others, pcjiut to a some- 

 what lon^- residence of the sea at sevend of the levels, 

 and to the intermittent elevation of the land. On the 

 wider terraces, at several levels it is usual to see a dei)osit 

 of sand and gravel corresponding to the Saxicava sand. 

 One of the most important terraces throughout the louver 

 St. Lawrence is that hetween oOO and (jOO feet, which 

 .^^eems to correspond with the time of deposition of tlie 

 principal bed of fossiliferous Leda clay. Corresponding 

 to the terraces on rising grounds are the " boars' backs," 

 kaims or eskers stretching along tlat lands between pro- 



