106 



OLAF I. RONNNIG 



from south to north and vice versa. It is also possible that such a land mass 

 was invaded by plants from both east and west. Most probably this occurred 

 in the Late Tertiary. 



Fig. 2. Barents Sea with depth contour lines. 



Later, geological events such as submergence of the land and glaciation 

 during the Pleistocene led to the splitting-up of the flora. Part of the flora from 

 then on has survived the glaciations in refugia most probably where, or close 



