362 



PLEISTOCF.NE GEOLOGY OF THE THAMES VALLEY. 



of this disturbance is coincident with that of the east and west 

 valley to the south of Sockett's Heath mentioned above. There 

 can hardly be any question as to the cause of the disturbance 

 affecting this gravel. The synclinal folding of the lower part, 

 the irregular character of the detritus which fills up the hollow 

 thus formed, and the vertical position of the constituent stones 

 of the latter seem to admit of but one explanation. All these 







X- 



-— X 



Fig. 2. Section in Sockett's Heath Gravel Pit. i, Irregular Gravel ; 

 2, Unstratified Sand ; 3, Unstratified Loan ; 4, Regularly Stratified 

 Sand and Gravel, false bedding in places ; 5, Thanet Sand (full thick- 

 ness not shown.) X — X, The floor of pit, below which the drawing is 

 diagramatic. 



characters were brought about as the result of the underground 

 dissolution of the Chalk by water charged with carbonic oxide 

 and organic acids acting along a more or less definite line of 

 weakness. This section simply supplies proof of the existence 

 of a process operating in the district whereby the surface of the 

 Chalk is dissolved away, the result of which is that furrows and 

 grooves are eroded in it into which the superjacent strata gradu- 



