270 vaughan: coerelation of tertiary formations 



Zone, by H. A. Pilsbry; Fossil Corals from Central America, 

 Cuba, and Porto Rico, with an Account of the American Tertiary, 

 Pleistocene, and Recent Coral Reefs, by T. W. Vaughan; The 

 Sedimentary Formations of the Panama Canal Zone with 

 especial reference to the Stratigraphic Relations of the Fossili- 

 ferous Beds, by D. F. MacDonald; The Biologic Character and 

 Geologic Correlation of the Sedimentary Formations of Panama, 

 in their relation to the Geologic History of Central America and 

 the West Indies, by T. W. Vaughan. These memoirs are in 

 press as Bulletin 103 of the U. S. National Museum. 



A set of memoirs on the Lesser Antilles and Cuba, similar to 

 that on the Canal Zone, is almost complete, and will be submitted 

 to the Carnegie Institution of Washington for publication. 

 The stratigraphic results procured from the West Indian investi- 

 gations have been utilized in making geologic correlations. 



CORRELATION OF THE TERTIARY FORMATION OF THE SOUTH 

 ATLANTIC AND EASTERN GULF COASTAL PLAIN 



Table 1 indicates the present status of the correlation of these 

 formations, and although it may have to be modified to accord 

 with the results of additional investigations, there seems to be 

 every reason to believe that subsequent changes will be only in 

 matters of minor refinement. However, I wish to say that in 

 my opinion four paleontologic zones will be discriminated and 

 defined in the Chattahoochee formation, and that the collections 

 on which to base these subdivisions have already been made and 

 in large part described, but I will not now discuss those details. 

 I confidently expect the Ocala limestone also to be subdivided 

 into two or more zones, for the genus Orthophragmina so abun- 

 dantly represented in the lower part of the formation appears to 

 be absent in the upper beds. 



CORRELATION OF THE TERTIARY SEDIMENTARY FORMATIONS OF 



PANAMA AND THE WEST INDIES 



Three new stratigraphic terms introduced in table 2 need to be 

 briefly defined in this place. More comprehensive definitions are 



