126 HISTORICAL GEOLOGY 



ably having been across California as suggested by the later 

 geographic conditions (see Fig. 69). 



The Oriskany sea was more widespread and covered the whole 

 Appalachian region from central New York to Alabama and west- 



Fig. 69 

 Paleogeographic map of North America during early Devonian 

 time. (From Schuchert's "Historical Geology," courtesy 

 of John Wile\ T and Sons.) 



ward over much of the eastern upper Mississippi Basin, except 

 probably the Cincinnati anticline area. Nova Scotia-New Bruns- 

 wick remained submerged. The sharp change to deposition of 



