NORTH EUROPEAN GLACIAL DEPOSITS 125 



Seco)Ld glacial epoch. — Lower bowlder clay of north Germany. 

 Red bowlder clay of the Altmark ; numerous fluvio-glacial sands 

 and clay (Glindower clay) under and over it. 



Second intcrglacial epoch. — Mammalian fauna of Rixdorf, 

 marine and fresh water deposits of west and east Prussia, oyster- 

 banks of Slade, Blankanese, Fahrenkrug; peat of Lauenburg, 

 Beldorf, Fahrenkrug, and elsewhere. Calcareous tufas of Madge- 

 burg, fresh water formations of Rathenow and the district of 

 Potsdam. 



Third glacial epoch. — Upper bowlder clay of north Germany. 

 Terminal moraines of the Baltic Range and more southerly dis- 

 tricts. Valley sands of the great valleys and ice-dammed seas. 

 Clayey deposits (valley clay, Deckthoti). 



Postglacial epoch. — Arctic flora beyond the north German 



Turbaries. 



K. Keilhack. 

 Berlin. 



