612 THE PLIOCENE PERIOD 



Aleutian Islands, where the sea remains unfrozen. Pliocene fossils 

 from the northwest coast of Iceland indicate a temperature no 

 colder than 42 (mean), where conditions are now arctic. The 

 apparent lack of harmony between the phenomena of California 

 and higher latitudes may perhaps be due to the different horizons 

 from which the fossils come, the fossils from the different places 

 recording the climate of different parts of the period. 



Certain fossils of Japan and California indicate intermigration, 

 or migration from a common center, some time during the period. 



