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THE YOUNG NATURALIST. 



The chief fossils of the Wealden Beds are : 

 Hastings. 



Cyrena media, C. parva, C. obtusa, Melania strombiformis, Paludina fluvi- 

 orum, Unio Valdensis, U. porrectus, U. subsinuatus. 

 St, Leonards. 



Cyrena media, C. elongata, Paludina fluviornm. 



THE LOWER GREENSAND. — The strata known by this name 

 forms a picturesque hilly ridge, running from the coast at Hythe by Lympne, 

 in a north-west direction to Sevenoaks, and then due west to Westerham. 

 It is divided into four divisions, these being 



Folkestone Beds, 90 feet. 



Sand gate Beds,. 80 feet. 



Hythe Beds, 120 feet. 



Atherfield Clay, 30 feet. 



THE FOLKESTONE BEDS consist of light coloured sands, some- 

 times very coarse, including layers of siliceous limestone and chert. 



THE SANDGATE BEDS. — These consist of dark clayey sand and 

 clay, with few fossils. 



THE HYTHE BEDS.— These consist of limestones, sandstones and 

 sands, with iron sandstone and chert. 



THE ATHERFIELD CLAY.— This formation consists essentially of 

 clay, with in places, calcareous bands. 



The chief fossils of the Lower Greensand are : 

 Hythe. 



Trigonia ornata, Pinna galliennii, lnoceramus suleatus, Gervillia anceps, 

 Peclen quinquecosta, Rhynclionella parvirosti, Plicutula ptacunea, 



Maidstone. 



Modiola bella, Terelratula depressa. 



Sandgate. 



Lima cottalina, Rhynchonella sp., R. gibbsiana, R. depressa, 

 Lympne. 



Anomia laevigata, Astarte laticosta, Exogyra canaliculata, E. Boussingaulta, 

 E. haliotordea, Lima coitaldina, Modiola lineata, Ostrea macroptera, 

 Pecten inter striatus, P. quinquecostatus, Philadomya gigantea, Plicatula 

 placunea, Trigonia caudata. 



THE GAULT. — Between the ridge formed by the Lower Greensand, just 

 described, and the Chalk escarpment there is a narrow and well marked valley. 

 The bottom of this valley is formed of gault, which is a stiff blue clay, 100 

 feet thick, at Folkestone, where at Copt Point and Eastwear Bay fine sections 



