QUATERNARY DEPOSITS OF BRITISH ISLES BROOKS. 



361 



I have already worked out the correlation between the east coast 

 of England and Thames Valley on the one hand and Holland and 

 north Germany on the other, and also between the latter and the 

 Alps. All these correlations, which are based on a variety of geo- 

 logical evidence, mainly paleontological and stratigraphical in its 

 nature, agree, giving very strong support to the classification 

 adopted. 



CONCLUSION. 



The series of cross correlations described in the preceding pages 

 show definitely that glacial and interglacial periods were not the 

 local phenomena that they are sometimes considered to be, but were 



