CONCLUSION. 



Having in the last chapter endeavoured to correlate such 

 of the glacial deposits in Cambridgeshire as seem comparable 

 to any in other parts of East Anglia, I conclude by offering 

 a few remarks upon two much-contested questions, viz. the 

 conditions under which these beds have been deposited, and 

 the age of the principal physical features of the country. 



I cannot but feel that the knowledge of glacial phenomena 

 and glacial formations which I at present possess, although 

 aided by a practical acquaintance with the latter as they are 

 exhibited over parts of Cambridge, Suffolk and Norfolk, is 

 insufficient to enable me to arrive at any very decided con- 

 clusions regarding the first of these questions. I cannot regard 

 any of the rival theories as entirely satisfactory, and think that 

 a much larger experience, and a still greater accumulation of 

 facts, is yet needed before this problem can be fully and com- 

 pletely solved. 



I shall venture however to criticise certain opinions that 

 have been put forward concerning the stratigraphical relations 

 of some of the beds, and to state some inferences regarding the 

 physical geology of Cambridgeshire which seem to follow from 

 a consideration of the facts recorded in the preceding pages. 



At the time of writing this Essay I looked upon the main 

 features of the country as determined before the Glacial 

 Period ; some of them were demonstrably in existence before 

 the incidence of the Upper Boulder Clay, and it was equally 

 evident that most of the minor features were produced ^t a 

 subsequent date. I saw no grounds for supposing that there 

 was any marked break in the glacial series, but was disposed to 

 agree with Mr Penning, that, in the succession and transgressive 



