402 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [May 6, 



well-developed as that at the last cutting ; the other two imperfectly 

 exhibit a few beds of sandstone, whose position appears to be nearly 

 horizontal. 



The railway reaches Tunbridge Wells by a tunnel under the hill 

 upon which a part of the new town is built ; the works are at pre- 

 sent (February 1846) incomplete, but the following section is tolera- 

 bly well-exposed in the cutting at the entrance to the tunnel. 



Tunbridge Wells Section. 



Thickness in feet. 

 10. Thin-bedded yellow clayey sandstone with no organic remains, 

 passing upwards apparently into the thick-bedded soft sand- 

 stones forming the summit of the hill 10 



9. Brown clay with numerous imperfect vegetable impressions... 1 to 3 

 8. Soft whitish sandstone. This and the overlying clay thicken 



considerably as they trend southward 3 to 6 



7. Bluish grey or greenish clay : no organic remains 1 to 2 



6, \^Tiite argillaceous sandstones, thin-bedded and soft 3 



5. Compact sandstone 2 



4. Light grey soft fissile sandstone 2 



3. Very fine white soft sandstone with irregular patches and 

 traces of vegetable impressions and fragments of lignite. 

 Upper layers are thick-bedded and disintegrate into a fine 

 white sand ; in descending it becomes thinner-bedded and 



greyer 15 



2. Dark grey clay and shale with numerous impressions of plants 1 

 1. Whitish sandstone 5 



Organic remains are extremely scarce in all the beds of this sec- 

 tion : we met with no remains of Testacea and but few indetermina- 

 ble impressions of plants in some of the layers. The bed of sandstone 

 (3) presents a ferruginous pisolitic appearance. The dip of these 

 beds is about two degrees N.N.W. They are undisturbed, with the 

 exception of a slip trifling in amount but peculiar in character, as 

 seen in the annexed section. 



Fig. 4. Reveksed Fault, Tunbridge Wells Cutting. 

 (Difference of level = 1 foot.) 



" ^ ''•^/^^'=-~ 3. Thin-bedded yellow sandstone. 



2. Brownish grey clay with vegetable 

 impressions. 



The tunnel passes through beds of sandstone, being a continuance 

 of those described in the section No. 4, but at the southern entrance 

 are some greenish-coloured shales, apparently lower in the series, 

 resembling in lithological character and in the absence of organic 

 remains those at the section at the east end of Southboro' Hill. 



