TIIK CKKTACEOU8 SYSTKM 479 



111 Sin-ivy this division is represented by the Nutfield and 

 Bargate Beds, which at Nutfield consist chiefly of soft sandstone 

 and Fuller's Earth (a fine silty clay). 4 



Between Reigate and Godalming the Bargate Beds consist of 

 sands and hard calcareous grits (Bargate stone), with some thin 

 layers of Fuller's Earth and coarse pebbly beds at the base, con- 

 taining phosphate nodules and many fossils; the whole thickness 

 is about 50 feet Avicula pectinata is a characteristic fossil of the 

 Bargate stone ; Terebratula oblonga, T. depressa, Waldheimia 

 tamarindus, Terebratella Fittoni, T. trifida, and T. Menardi are some 

 of the fossils occurring in the pebble beds, and with them are many 

 fossils derived from the Oxford Clay, which must at that time have 

 formed part of the shore-line north of Godalming. 



In Hants and West Sussex the Sandgate Beds reappear in a 

 more normal form, consisting of shaly clay at the top, with sand 

 and sandy clay below. 



In the Isle of Wight the Hythe and Sandgate Beds are 

 represented by the Ferruginous sands, which consist of alternating 

 beds of sand and clay, the sands of grey, green, or yellow tints and 

 the clays brown or blue. The lowest beds are known as " the 

 crackers," and contain Holcostephanus Hambrovii, Gervillia anceps, 

 Trigonia caudata, Pleuromya plicata, etc. The overlying beds 

 contain Terebratula sella in great profusion with Douvilleiceras 

 Martini, Macroscaphites gigas, M. Hillsi, and Crioceras Bowerbanki. 

 These lower beds may be called the Walpen sands, and they corre- 

 spond to the Hythe Beds. Above them are the equivalents of the 

 Sandgate Beds, comprising two beds or bands, the lower of sand 

 with ferruginous concretions about 20 feet thick, the upper a bed 

 of clay without fossils and 40 feet thick. The concretions yield 

 Rhynchonella sulcata, Avicula pectinata, Thetis Sowerbyi, Cyprina 

 angulata, and Trigonia vectiana. 



Folkestone Beds. At Folkestone these consist of light-green 

 and grey sand with beds of hard stone, partly siliceous and partly 

 calcareous in composition, which have been described by Dr. G. J. 

 Hinde as veritable sponge-banks, the sponges being of the Hex- 

 actinellid order, and their fine needle-like spicules are clearly visible 

 on weathered portions of the rock. The total thickness is about 

 80 feet. Fossils are not abundant in these beds, but they have 

 yielded Avicula pectinata, Exogyra sinuata, Pecten (Neithea) atava, 

 Neithea Morrisi, Ostrea frons, and Waldheimia pseudojurensis. 



For a few miles inland the composition of the Folkestone Beds 

 is much the same, but west of Saltwood they begin to change their 

 character, the cherty sponge-beds disappear, and the sands are 

 chiefly white, yellow, and brown, current-bedded, and including 





