420 H. A. Baker — Loose Arenaceous Sediments. 



This remarkable feature in the Thanet Beds, although apparently 

 universal in Kent, appears to be wanting farther west, in Surrey. 

 From an examination of samples in that area the writer noted that 

 in the upper part of the Thanet Sand an increase in the Equivalent 

 Grade value was accompanied by a diminution in the Grading 

 Factor. This feature was traced as far east as Charlton, where the 

 writer found that the extreme top of the Thanet Sand, whilst giving 

 the highest Equivalent Grade value of any Thanet Sand analysed, 

 gave a somewhat lower Grading Factor than was expected. It 

 seems likely that the readjustment of conditions which resulted in 

 the succeeding Woolwich and Reading Beds being of marine type 

 in East Kent, and of estuarine and freshwater type farther west, 

 commenced before the deposition of the Thanet Beds had been 

 completed. 



{To he continued.) 



