CONTENTS. XX1U 



PAGE 



Plastic Clay Formation 273 



Marine Limestone Formation 274 



First System of Strata ib. 



Second System of Strata 275 



Third System of Strata 276 



Fourth System of Strata 277 



Siliceous Limestone without Shells ib. 



Gypsum Formation and Marine Marl 278 



Sandstone and Sand without Shells 285 



Upper Marine Sandstone and Sand ib. 



Millstone without Shells 286 



Flint and Siliceous Limestone 288 



Alluvial 291 



General Observations 292 



MINERALOGY OF THE SOUTH OF ENGLAND. 



1. Isle of Wight Basin 296 



2. London Basin ib. 



FORMATIONS. 



Chalk 296 



1. Lower Marine Formation, including the Sand and Plas- 



tic Clay and the London or Blue Clay 297 



2. Lower Fresh Water Formation 303 



3. Upper Marine Formation 304 



4. Upper Fresh Water Formation 307 



5. Alluvial Formations 308 



Formations above Chalk 311 



Formations below Chalk 313 



Letter from Mr. Marsden to Professor Jameson 316 



