126 Of'I I.IM s oi I II LD-GEOLOCY PARTI 



glomerates (s) dipi :ds the south- 



west, which arc in turn unconformably covered by glacial 

 and gravels (</). This is .in interesting and instruc 

 live section, inasmuch as it teaches us how rash it would 

 be to form any conclusion as to the n-laiivc length of 

 the intervals of time represented by the amount of 

 discordance between unconformal>le formations. The 

 break between the quart/ite and the red sandstoi 

 apparently much more violent and complete than that 

 between the sandstones and the glacial deposits. And 

 yet there can be little doubt that in regard to geological 

 age, the interval of time between the deposition of the 

 quart/ite and that of the sandstones was shorter than that 

 between the sandstones and the overlying clays and 

 gravels. It is evident indeed that sections might be 

 found showing an apparently perfect conformability for 

 a certain space between the sandstones and the glacial 

 beds. Yet this local agreement in position would not 

 be allowed to conceal the real and complete break be- 

 tween the two series of formations. 



