54 



WEALDEN GROUP. 



3. ASHBURNHAM BeDS. 



A seiies of highly 

 ferruginous sands, al- 

 ternating with clay, 

 and shale, containing 

 ironstone and lignite. 



Shelly limestone, al- 

 ternating with sand- 

 stone, shale, and 

 marl; and concreti- 

 onal masses of grit. 



Ferns, Lignite, &c. 



Cyptis. 



Shells of the genera 

 Cyclas and Cyrena ; 

 lignite carbonized vege- 

 tables. 



Lower part of Hast- 

 ings Cliffs ; near 

 ' Buxted; West Hoth- 

 ly, Crawley, &c. 



Archer's Wood, near 

 Battle ; Brightling, 

 Pounceford, Bur- 

 wash, Hurst Green, 

 Eason's Green. 



The greatest superficial extent of the Wealden is com- 

 prised within the Chalk escarpment of Kent, Surrey, 

 Sussex, and Hampshire, and forms an area of a somewhat 

 irregular triangular form, the base extending along the 

 sea-coast from Pevensey to Hythe. The Wealden is very 

 clearly exposed at the southern side of the Isle of Wight, 

 and forms the CliiFs between Atherfield Point and Compton 

 Bay ; it also occurs in Sandown Bay. The Purbeck beds 

 and overlying sands are well exhibited in Swanage Bay, 

 Worbarrow Bay, and Durdle Cove, Dorsetshire ; and the 

 existence of similar strata in the Vale of Wardour, has 

 long been known. A slaty limestone with Cypris, &c., 

 considered by Dr. Fitton to be similar to that which occurs 

 in the upper part of the Isle of Portland, is found at Brill, 

 and Whitchurch, near Aylesbury, Bucks. The Wealden 

 also occurs at Linksfield, near Elgin, according to Mr. 

 Malcomson, (Geol. Soc. Pro. vol. ii. p. 667.) 



LOCALITIES FOR FOSSILS. 



Quarries near Bethersden, Kent; and around Tunbridge Wells. 

 {Cyprides, Cyrena, &c.) ; Heathfield, Pounceford, {Eqmsefum 

 Lyellii), Burwash, &c. 



