1S4 'I'HK ICK A(iK IN CANADA. 



iMiuldcr-clay imiyiii sonic jilnccs lie seen m sti'iililicd simdy 

 clay, uliicli t'uillicc up tlic livcr iitliiiiis t(t a i^rcat 

 lliickiiess. It ('(tulaiiis Sti.iii'ant riitjtixd, TcIHiki (Inni- 

 londivd and TiIHiki iiilniirii,\i)i, well as Lnhi t/hicifdix. The 

 most rcH'ciit iloposit is a sand or juravcl, often of considei- 

 al»l(! tliickiicss, and in some of the heds ol" i^ra\(d the 

 l»ehl)les are UKtre comitlelely rounded than those of the 

 mo(h'rn hcacli. 



I hav(! already staled my rt'asoiis for Itelievinc; that the 

 upper part of the valley of the Murray i>ay river may 

 have been the lied of a glacier ilowinu' down from tin; 

 inland hills toward the St. Lawrence. X.W. and S.E. 

 striae attrihutahle to this glacier were seen at an idevation 

 of SCO feet, and the marine heds were traced up to almost 

 the same liei<j;ht, above which, t<t a height of about 1,200 

 feet, loose boulders were observed and glaciated roek- 

 surfaces, but no marine deposits. It is probable, there- 

 fore, that at a time when the sea extendiid up to an 

 elevation of SOO feet, the hi^yher j>art of the valley may 

 have been Idled with land ice. Whether the 1)er;i;s from 

 this, drifting' down toward the St. Ijawrence, [n'odueed 

 the X.W. strialion ob.served at a lower level, or whether 

 at a previous period, when the land was hiirhei', the ice 

 extended farther down, may admit of doulit. Certainly no 

 land ice has extended to a lower level than about 800 feet 

 since the deposition of the mr-rine boulder and Ledu clay. 



Very lart^e boulders occur in this vicinity. ( )ne observed 

 on the beach on the east side of the l)ay, is an oval mass 

 of lime felspar, thirty feet in circumference, lyinj^ like 

 most other large Iwulders in this region, with its longer 

 axis to the N.E. 



Lcs Ehivdemt'nts. — At this place the Lanrentian hills 

 rise to a great height near the shore, and the Pleistocene 



