168 PROCEEDINGS OF THE PALEONTOLOGICAL SOCIETY 



CRETACEOUS-EOCENE CONTACT IN THE ATLANTIC AND GULF COASTAL 

 » PLAIN 



BY L. W. STEPHENSON 



{Abstract) 



The paper emphasizes the fact that the Cretaceous aud Eocene deposits of 

 the Atlantic and Gulf Coastal Plain are separated by an unconformity of 

 regional extent. Faunal evidence is offered to show that, in terms of geologic 

 time, this unconformity represents a very great hiatus. The differences ex- 

 hibited by the faunas on either side of the contact indicate changes greater 

 than those effected through evolutionary development during the time repre- 

 sented by the Exoyyra ponderosa and Exogyra custata zones of the Upper 

 Cretaceous ; the differences are also greater than the faunal changes effected 

 between the lowermost Eocene and the Recent, in the same province. The 

 unconformity marks a great diastrophic movement which involved the entire 

 Atlantic and Gulf Coastal Plain, 



lONE FORMATION OF THE SIERRA NEVADA FOOTHILLS, A LOCAL FACIES OF 



THE UPPER TEJON-EOCENE 



BY BOY E. DICKEESON 



{Abstract) 



The lone, in part at least, is marine and of Tejon-Eocene age. Marine fossils 

 have been found in the upper portion of the lone formation at Marysville 

 Buttes, Oroville South Table Mountain, Merced Falls, and lone. Apparently 

 the same faunal zone, the Siphonalia siitterensis zone, is represented in all 

 these places. 



STRATIORAPHIO AND FAUNAL RELATIONS OF THE LATER EOCENE OF THE . 



PACIFIC COAST 



BY HABOLD HANNIBAL 



(Abstract) 



Illustrated discussion of the stratigraphic and faunal relations of the Che- 

 halis, Olequa, and Arago formations of Oregon and Washington, and the Tejon 

 and lone formations of California, 



FAUNA AND RELATIONS OF THE WHITE SHALES OF THE COALINOA 



DISTRICT 



BY JOHN H. BUCKMAN 



VERTEBRATE FAUNA IN THE MARINE TERTIARY OF CALIFORNIA; THEIR 

 SIGNIFICANCE IN DETERMINING THE AGE OF CALIFORNIA TERTIARY 

 FORMATIONS 



BY J. C. MERRIAM 



