IMfVSICAF. AM) (MMA'IAr- COXDI'IIOXS. 70 



tioiis (if ii'iTjii iiiiiLiiiil iul<' wniiM lie |iiiMlii(t'(l (if the same 

 j,'eiM.'raI luitui'c witli tlidsc of tlic .Missdiiii ((ilcaii. Tlicst', 

 of (M)iirs(', iKiw ('(nisi iinlc ilic uit'iit " tcniiiiiiil iiKHiiiiK^ " * 

 wliicli liiis lici'ii so ('ai\'fiilly liacc(l liy llu; geologists of 

 llic I'liilcil Slates. 



( 'oiiii>ariiiu' a iiia|i nf Aiin'iica in llic I'lt'istoceiic with 

 that (if llic saiiic rc'^imi in llic laid' ( 'rctaeenus and early 

 Koeenc, it will lie at uncc seen Imw, in tiic (Hic case, the 

 iirclic e(iii(liti(ins ninsl have liccn iiansfcrK'd to tcniiicrate 

 rejiions, and Ikiw, in ilic nilifi', icni|M'ratc ((indilioiis must 

 have liecii carried iinilh to (licenland. 



It may lie well here to notice shditly the eonteiitioii 

 ofU-n made that the \M'i,i,dil of the ice uiioii the pai'ls of the 

 eontinents loaded with it must ha\(' hecn itself a cause of 

 the rieistoeeui'. dei)l'(!Ssion. No one has, 1 lndie\ e, eoii- 

 teiided more strenuously than the writer, in eonneetion 

 hotli with the carlioiiiferons deposits and thost; of the 

 deltas of n;veat rivers,+ in fa\dur of the inslaliility of the 

 erust of the eaitli wlien loa(hMl with n'l'eat weights or 

 when thesi' are I'emoxcd : hut it must be oliserve(l that 

 sueh weights are usually due to the (lei)osition of sediment 

 in the sea. 'I'he el't'eet of aeeumulations itf ice on high 

 lands is less certainly kn(^)wn. If, however, we imagine 

 that the continental period of the later Pliocene was 

 closed by a dill'erential de})ression, sulmierging the plains 

 and leaving the monntains elevated, the resulting geogra- 

 phical conditions would be favourable to accumulation of 



* I need scarcely say that the reference of this terminal moraine to 

 a land glacier is al)surd on physical grounds ; and there is no modern 

 example of such a thing, as even the Clreenland neve discharges by 

 local glaciers. 



t "Acadian Geology," "Modern Science in Bible Lands," Presi- 

 dential Address to Brit. Association, 1880. 



