PALEOBIOGEOGRAPHY OF THE MARINE REALM 



80 90_ 



191 



Fig. 11. Paleomagnetic polar positions and paths in the Northern Hemisphere 

 according to Runcorn (1959, Fig. 5). 



repeating Lotze's (1957) data on the Northern Hemisphere 

 distribution of evaporites (Fig. 12). Contrary to Runcorn (1959, 

 p. 1011), such sediments are not indicative of equatorial proximity, 

 but of an accelerated rate of evaporation, commonly best developed 

 in the zone of variable winds and calms between the trade winds 

 and the prevailing westerlies (Fig. 6). The remarkable thing about 

 Lotze's data is that from the Permian onward they conform nicely 

 with the concept of a higher position for this zonal relation during 

 the warmer climatic intervals when the polar easterlies were 

 probably absent and the other wind belts wider. The pre-Permian 



