- 7 - 



No analytical study of the Folkestone phosphates 

 has "been made, though isolated nodules have "been 

 found en analysis to contain from 5 to 52 per cent 

 of calcium phosphate o In common with most sedimentary 

 phosphate, these nodules are lich in flucrlrxe and in 

 some cases radio-active elements are also present. 

 This is prohahly connected v/ith long exposure of the 

 nodules on the sea-floor. Infir_itu;?:iricii quantities of 

 uranium and other radio-active elements are present 

 in sea water and "ohosphate is helieved to have the 

 property of absorbing these elements, PhosDhorite 

 nodules from the Mammillatum Bad, at the junction of 

 the Gault and Lower Greensand are among the most 

 radio-active sedim^entary roc>:s in the British Isles „ 



MONOGRivPH OP THE .AJ/IMONOIDEA OP THE LOVfdlR GI^]ENSAl^D 



v.; 



A monograph of the ammonoidea of the Lower 

 Greensand formation, based lai'gely en materia], fro; 

 Polkestone and Hythe areas ^ is in preparation by 

 Mr. R. Casey. Members of the Society v/ho possess 

 specimens of ammonites from, the Lower Greensand or m^ho 

 have information concerning the v/hereabouts of such 

 specimens are asked to contact Mr. Casey at the 

 Geological Survey and Museum,, Exhibition Ready 

 London, S.W.7. 



