164 



GRAVELS, ETC., OF WEST HERTS. 



once washed the upper parts of the Chiltern Hills. This, however, 

 like so many geological questions of a similar nature, is largely 

 a matter for conjecture. 



Section 10. — Near Gubblecote. 



;»^^v!oV'K^^ 



^l^,V' 



.:>->-^-vi^; 



A. SoU. 



b. Manganese deposits. 



C. Chalk pebble-gravel. 



D. Gault. 



This completes the account of the gravels, sands, clays, and 

 loams of Western Hertfordshire, so far as they were intended to be 

 treated in this paper. The account itself is incomplete in many 

 respects, and many interesting parts of the subject have not been 

 discussed. I trust, however, that I have succeeded in describing 

 the beds correctly, and that I may be excused fi'om discussing the 

 subject from a speculative point of view. 



