1 



Interregional Correlation of the Trias&ic (after Prof. James Perrin Smith, except for Alaska) 



Mediterranean r e.i. 



rctie-Pacific region. 



Pseudomono- 



nd Indian ocean. 



handling beds with Tropit 



Raibl beds with Trachyeeras 



Cassian beds with Traehy- 



DawsoniteB slates of Bear 



Ceratite slates of Japan with 

 Analcites and Lfanubites. 



Middle 



Mu>uli.-I 



kalk. 



Mus.hel- 

 katk. 



the Hchrey Alps. 

 with Geratites tri- 

 nodosus. 



ohe I kalk with 



Daonella 

 of Spitz- 



Tirol ites 



Mediterran- 

 egion an 



Oriental region. 



.imestones with Halorite.- 



Tropites limostom- 



Beds with Tmchy- 



Beds with Trachy- 



Ce'ratiies triuodosu 



Lower Musr-hiMknlk. 



Otoceraa beds. 



Ceratite 

 limestone 



Rhabdoceras 



Spirifeiinabfds. 



HHlohiasuperha 



Daonella dubia 



McCarthy formation 

 {shales with chert 

 in lower part). Con- 

 (ains I'-eiidomono- 



snperba, Tropites, 

 -In VLtvitos, Arcestea, 

 etc.). 



Cak-iiri'Oii; =*hal<; wiih 



Yukon Valley and 



[-■selldumoilOU.-. 



Pseudomonotis. 



* These series, stage, and substage tern 



been adopted by the United States Geological Survey. 



'ith Dawsonites 



Slates of Brooks 



onella and Ce- 

 iteB (Gymnoto- 



