THE EOCENE AND LOWER OLIGOCENE CORAL FAUNAS 

 OF THE UNITED STATES. 



By T. Wayland Vaughan. 



NOME>^CIjATtJRE OF THE EOCEIVE AISTD LOWER OLIGOCE^TE 

 EOBMATIOXS OF THE UNITED STATES. 



Attention is called especially to Bulletin 83 of the United States 

 Geological Survey, Correlation papers — Eocene, by W. B. Clark, and 

 to "A table of the North American Tertiary horizons, correlated with one 

 another and with those of western Europe, with annotations," by William 

 H. Dall.^ These two papers give a rather thorough treatment of the subject. 

 The following table is extracted from Ball's paper. Two points in this 

 table deserve special mention: First, the old name "Lignitic" or "Eolig- 

 nitic" is abandoned, and the various beds of these are placed in two 

 stages — a lower, "Midwayan," following Harris,^ and an upper, to which 

 the iiame " Chickasawan " is given; second, the old lithologic name 

 "Bulu-stone" is suppressed and the locality designation "Tallahatta" is 

 given. 



Often one can not differentiate the various horizons of the Claibom- 

 ian in other States as they are recognized in Alabama and Mississippi; 

 therefore the name "Lower Claiborne" is convenient to designate collect- 

 ively that part of the Claiboruian below the Claiborne sand horizon.^ 



> Eighteenth Ann. Kept. U. S. Geol. Survey, Pt. II, 1898. 

 2 Am. Jour. Sci., 3tl ser., Vol. XLVII, 1894, p. 301. 



'Harris wa.s the first to use "Lower Claiborne'' in this manner. Cf. Am. Jour. Sci., 3d ser.. 

 Vol. XLVII, p. 301. 



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