206 



Callovian and to the «white Jura». The identical character of 

 the beds will probably be revealed in a yet more striking 

 manner, when, at some future time, more fossiliferous material 

 from East-Greenland is available, so that the determination of 

 the zones can be worked out completely in this country. 



The various conclusions arrived at with regard to the 

 Jurassic deposits of East-Greenland are of the greatest palæo- 

 geographical significance. As Pompeckj^) has pointed out, a 

 Bajocian sea was situated to the north of the Jurassic continent 

 of Eurasia. We now know that this sea, at the close of Bajocian 

 or at the beginning of Bathonian times, extended as far as East- 

 Greenland, and its shore in that direction was in the vicinity of 

 the present coast-line. The Bajocian Polar Sea must have been in 

 direct connection with the Central- and West-European sea, by 

 means of a strait which passed between the Scandinavian part 

 of the Eurasia of that period and the then existing Nearctic 

 continent (Neumayr). Similar relations existed in Callovian and 

 Portlandian times, but Scandinavia must then have been an 

 island, with the Polar Sea extending across the greater part of 

 Russia and Siberia. Whether or not the sea receded from 

 East-Greenland during the intervening periods, it is impossible 

 to determine on the ground of existing evidence as, up to the 

 present time, no deposits belonging to these periods have been 

 found there. 



M PoMPECKJ, J. F. 1899, p. 40. 



