SUMMARY OF CONTENTS. 



Page. 



Introduction 7-8 



PART I. 



The Oligocene of Western Europe: Field Work in 



the Oligocene of France and Belgium 9-15 



A Review of the Oligocene of Western Europe... 16-41 

 The Oligocene in Germany; The lignitic formation; 

 Marine beds; Geological map: Beyrich\s classifica- 

 tion of the marine beds 16 



Name Oligocene proposed; Magdebtug sands; Septa- 



ria clays 17 



Sands of Stettin; Sands of Cassel and Binide; The 



Oligocene i7i Belgium; Diimonf s classification 18 



Tongrian; Rupelian; The Bolderian a Miocene horizon 1 9 



Classification adopted in i8p6 20 



Fossilifo'ous beds of Limbourg ; Ostrea ventilabrum beds 2 1 

 Sands of Necrrepe^i and Grimmertingen ; Sands of 



Bautersem 22 



The clays of Henis; The sands of Vieuxfo?ics 23 



Fossiliferons Rupelian beds; The sands of Berg; N21- 



cula clays 24 



The clays of Boom; The Oligocene of the Paris basin.. 25 



SeFlion of the Paris basin Oligocene 26 



Base of the Oligocene series; Clays above the gypsum; 



The green clays ' 27 



Brie limestone; Sands of Fontainebleau ; Oyster-shell 



marls 28 



Shell marls of feurrc; Sands of Morigny ; Sands of 



Etrechy 29 



Sands of Vaiwoux; Sands of Picrrefitte; Sands of 



Saclas; Fontainebleau sa^idstonc 30 



Beauce limestone; The Stampian period; Oligocene in 

 Britta7iy; Limestone of Rennes charaflerizcd by 

 A rchiacina 31 



