STRATIGRAPHIC SUMMARY. 6S7 



Lower Eocenic. 



Chickasawan or Lignitic formation including: 

 Hatchetigbee beds, Bashi series or Wood's Bluff beds, 

 Tuscahoma or Bell's Landing beds, Gregg's Landing 

 beds and Nanafalia beds, all from Alabama. 

 MiDWAYAN or Claytonian formation including: Nahe- 

 ola or Matthew's Landing beds, Sucarnochee or Black 

 Bluff beds, Midway limestone and Prairie Bluff beds. 



On the Atlantic coast, the lowest Eocenic appears to be repre- 

 sented by the Shark River marls of New Jersey which appear to 

 rest conformably upon the Upper Cretacic (Jerseyan). In Mary- 

 land and Virginia, the Pamunkey formation, with the following 

 subdivision, represents early Eocenic: 



Pamunkey formation (Lower Eocenic). 

 Nanjemoy series. 



Woodstock formation. 

 Potapaco formation. 



AOUIA SERIES. 



Paspotansa formation. 

 Piscataway formation. 



This rests disconformably upon the late Cretacic. 



To the middle Eocenic are referred the Orangeburg beds (Buhr- 

 stone) of South Carolina, the Wilmington beds of North Carolina 

 and the Gatun beds of the Isthmus of Panama. 



To the Upper Eocenic are referred the Manzanilla beds of 

 Trinidad and the Santee formation of the Carolinas. 



On the Pacific coast in California the Lower Eocenic is called the 

 Martinez group, and the Upper the Tejon group. The Topatopa 

 group locally represents this series in Ventura county, California. 

 In western Oregon, the Eocenic includes in descending order: the 

 Tyee, Coaledo, Pulaski and Umpqua formations. The Coaledo and 

 Pulaski formations are united into the Arago formation. In eastern 

 Oregon, the Clarno group represents a part of this series while in 

 western Washington and western British Columbia, the Eocenic 

 and Oligocenic beds together constitute the Puget Group. In cen- 

 tral Washington the Manastash beds and the Roslyn beds repre- 

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