CONTINENTAL DISPLACEMENT SCHUCHEKT 269 



be explained only by long migration routes, and the strongest simi- 

 larities are found only among the graptolites (floaters), corals (larvae 

 long in development while floating), and trilobites (good swimmers). 

 Nor do the times of orogeny agree, and while volcanic activity was 

 marked in Great Britain during the Ordovician and Silurian, almost 

 nothing of the kind occurred in Newfoundland. 



Evans, in his introduction to the English edition of Wegener's 

 book," makes the following astonishing statement : 



The succession of the spclimentary rocks in areas now separated by thou- 

 sands of miles of sea shows remarkal)le resemblances tliaf can only be reason- 

 ably explained if these sediments w(Me laid down in close proximity to one 

 another and iinder practically identical conditions. 



The accompanying presentation of the geology of Ireland and 

 Newfoundland shows, however, that there is very little in common 

 between these two countries in their stratigraphic sequence, facies 

 conditions, volcanic activit}^, orogeny, or marine fauna,s. "Why is 

 this? Because the St. Law^rence geosyncline and the New Brunswick 

 geanticline onCe extended across the Atlantic (with something like its 

 present dimensions) to Scotland and thence into Norway and Swe- 

 den. Holtedahl has brought this out a number of times, and we 

 paleontologists must in this case, and in others as well, have the long 

 migration routes to explain the slight relationship between the faunas 

 of northeastern North America and northwestern Europe. 



" A. Wegener, op. cit., pp. vii-viii. 



