240 Correspondence — Mr. F. G. Hilton Price. 



the Cretaceous beds of Landsborough Creek, a tributary of the 

 Thomson River, such as Ancyloceras Flindarsi, M'Coy, Aucella 

 JSiighendensis, Eth., sp., a probable Hamites and large Inocerami. 

 These would appear to indicate beds about the horizon of the 

 Marathon or Hughenden series of the late Mr. E. Daintree. 1 



E. Etheridge, Jun. 



THE LANDSLIP IN THE WARREN NEAR FOLKESTONE. 



Sir, — It is only right that a record should be kept of the very 

 extensive landslip which occurred in the undercliff of the Warren 

 near Folkestone on the 19th January last, not only because few 

 know anything of the circumstance, but that it might be useful in 

 case of future investigations. 



The area affected by this slip is very considerable, extending from 

 the Warren House, near the Martello Tower, eastwards to a spot 

 locally called the Jetty, a distance of nearly a mile in length and by 

 about a quarter or rather less in breadth. This undercliff is entirely 

 composed of rubble and debris from the Chalk cliffs above, which 

 have been falling and slipping over for centuries. This slip appears 

 to have taken a horizontal line from the seaward side of the railway 

 cutting, in fact, in some parts it started from the outside of the 

 actual railway bank. Had it broken away a few yards further inland, 

 and there is no reason why it should not have done so, the passengers 

 by the South-Eastern would then realize the danger to which the line 

 is exposed. This large area gave way and went down bodily for a 

 depth of from 12 to 20 feet, varying in places ; this had the effect of 

 forcing up the beds upon the shore several feet in height for about 

 a mile of the coast. Towards the east end of the slip, the Chalk- 

 marl is raised nearly 20 feet. It is a remarkable coincidence that 

 since this happened, there have not been any heavy seas upon this 

 coast, consequently no further damage has been done ; but when 

 heavy seas do come in, which they inevitably must, they will wash 

 away thousands of tons of the rotten rubble cliffs which, upon the 

 shore-line, are composed for the most part of debris from the cuttings 

 and tunnels, which when cleared away will give further impetus for 

 another and perhaps a more disastrous landslip to take place. 



The whole floor of the shore is much raised, with here and there 

 a depression which is probably the level of the old shore. In one 

 place the Upper Gault is raised into a hillock several feet high. 



The coming spring will afford an excellent opportunity for those 

 interested in Cretaceous geology to examine the Chalk-marl as it is 

 now placed. I may add, the whole of this area is constantly moving, 

 and another slip may occur at any moment. 



F. G. Hilton Price. 



Uth April, 1886. 



1 Quart. Journ. Geol. Soc. 1872, vol. xxviii. p. 279. 



