THE TRIASSIC PERIOD. 



31 



continent, while the Alpine phase characterizes the southern part. 

 Physically, the non-marine phase of the system resembles the Per- 

 mian of Europe, and the Permian and Triassic of the United States 

 east of the Pacific slope. 



In general, the Upper Trias is more wide-spread than the Lower, 



Fig. 336. — Sketch-map of Europe showing areas of sedimentation in the early part 

 of the Triassic period. The broken lines represent areas of non-marine deposits; 

 the full lines, areas of marine deposits. (After De Lapparent.) 



especially in the southern part of the continent, and is marine over 

 a wider area. 



The following table gives the principal divisions recognized in 

 Britain and Germany: 



Britain. 

 Rhsetic, 150 ft. max. 

 Upper Trias., 3250 ft. max. 

 Lower Trias., 2000 ft. max. 



Germany. 

 Keuper, 820-2000 ft. 

 Muschelkalk, 820-1100 ft. 

 Bunter, 650-1800 ft. 



Germany. — In Germany, where the Triassic phase of the system 

 was first exhaustively studied, and where it has its typical develop- 



