S6 



W. -WHITAKEK 01^ SOlfflE BOEIN-GS llf KENT. 



Surface soil 



Thickness 

 in feet. 



1 



/^ Upper Chalk, with flints 249 



I Middle Chalk, few flints 145 



E-ocky yellow chalk, no flints 39 



I Chalk Marl [= clayey chalk] 14 



[Chalk, 674feet.]-| Lower or grey Chalk 182 



Upper Gault or Chalk Marl [clearly the 



latter] ... 42 



Upper Grreensand [= green base of Chalk 



Marl], without water 3 



Gault ; 



I 



138 



[Lower Grreen- 

 sand, 49 feet?] 



[Beds of doubtful 

 age, 54 feet.] 



Eocky dead green sand 1 



Dead green sand 2 



j Hard boulder-rock 2 



I Dead green sand. Specimen at 831 feet, 



I fine greenish-grey clayey sand 31 



\^ Black sand and clay 13 



/'Brown clay. Specimens at 875 feet, 

 brown and brownish-grey clay ; at 879 

 feet, brownish-grey and grey clay, mixed 

 with chalky matter [? carried down the 



bore] 17 



Dark sand and clay 1^ 



Eock i 



Light-brown clay, with a greenish tinge 



(and with a small quantity of sand ?) . . . 8 

 Greenish clay (? and dark clay, with 



pyrites?) 15 



White pipe-clay 10 



1^ Greenish clay 2 



Depth 

 in feet. 

 1 

 250 

 395 

 434 

 448 

 630 



672 



675 

 813 

 814 

 816 

 818 



849 



879 



880^ 

 881 



889 



904 

 914 

 916 



It should be noted that of four accounts of this section that 

 have been received only two agree in the description of the beds 

 from the base of the Chalk downwards, and that the description 

 giving most detail, and at the same time the clearest explanation, 

 has been adopted. 



Perhaps the Gault should have been carried 5 feet lower, on the 

 inference that the 2 feet of rock may be the nodule-bed at the base 

 of that formation, though it may be a sandstone, like that which 

 occurs in the Folkestone Beds at the outcrop to the south. Perhaps, 

 too, the Lower Greensand may have been carried 13 feet too low. 



"What formation the clayey beds at the bottom belong to is un- 

 certain, no fossils having yet been found, though the workmen have 

 somewhat cleverly tried to make up for this want by making im- 

 pressions, from a small specimen of a recent Nassa^ in the clay. 

 Their earlier attempts, in the clayey greensand, are less artistic, 

 fair-sized specimens of the shell of the aforesaid Nassa having been 

 bodily included. It is possible, of course, that these clays may 

 belong to the Wealden Series, but the one clean specimen that I 

 have as yet seen seems to me more suggestive of a Jurassic origin. 

 The occurrence of Kimeridge Clay would be interesting. Speci- 

 mens are now under examination by IMr. Sharman. 



It may be useful to reproduce here an account of a trial-boring,. 



