458 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [May 24, 



Disturbances iu true river-deposits are described by Mr. Godwiu- 

 Austen * as occurring in the gravel of the Wey valley. In one sec- 

 tion figured by Mr. Godwin- Austen, gravel is seen faulted against 

 Neocomian clay. Mr. Prestwichf has also figured and described 

 disturbances in the river-gravel of the Somme : they are stated to 

 occur chiefly in the higher gravels. Mr. Trimmer, Sir Charles 

 Lyell, and Mr. Prestwich look to ice as the cause of these phe- 

 nomena. 



Disturbed gravel has occasionally been met w^ith in the basin of 

 the Medway. At a brick-earth pit, near Hadlovs^ (marked Pottery 

 on the Ordnance Map), some gravel beds have been bent into a 

 sharp anticlinal, enclosing in the centre a little of the Weald Clay, 

 which underlies the gravel. The sketch on the last page (fig. 6) will 

 give a better idea of the section than any verbal description. One 

 way of accounting for the disturbance is by supposing that the 

 gravel was bent up by the grounding of some large mass of ice. 

 This explanation is in accordance with the theory that the climate, 

 during the deposition of the older gravels, was colder than at 

 present. 



In September 1864 a considerable section of loam and gravel was 

 open at Leney's Brewery, Wateringbur3^ The gravel resting on 

 Atherfield and "Weald Clay was seen distinctly dipping 25° to 30° 

 to the N.E. This appearance was certainly not due to false- 



Pig. 7. — Section hi a Gravel-pit north of Maidstone Gaol. 



bedding, as all the beds, both fine and coarse, showed it equally 

 weU. The gravel, therefore, must have been disturbed since its 

 deposition. 



* Quart. Joum. Geol. Soc. vol. vii. (1851), p. 285. 



t Phil. Trans, vol. cl. (1860), p. 299, and vol. cliv. (1864), p. 269, 



