BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



VOL 33. PP. 639-664 SEPTEMBER 30. 1922 



COKKELATION OF THE JURASSIC FORMATIONS OF 



WESTERN CUBA x 



BY BARNUM BROWN AND MARJORIE o'CONNELL 



{Presented before the Society December SO, 1921) 



CONTENTS 



Tage 



Introduction • • 639 



History of investigations 640 



Typical sections of the Jurassic in the Province of Tinar del Rio 643 



General statement 648 



Candelaria section 644 



San Cristobal sections 645 



Sections near San Diego de los Bahos 646 



Viiiales sections 646 



General summary of field relations and their significance 651 



Correlation of the Jurassic of Cuba and Mexico 653 



Correlation of the Jurassic of Cuba and Europe 656 



Classification of Middle and Upper Jurassic of western Cuba and 



southern Europe 656 



Comparison of Cuban succession with European standard 660 



Summary 663 



Introduction 



This paper constitutes a general summary of the field and laboratory 

 work on the Jurassic of Cuba thus far completed by the authors. It is 

 based on personal studies made by Mr. Brown in Cuba during five, 

 journeys, covering eleven months of field work and exploration, in those 

 provinces west of Camaguey, and on the results obtained by Miss 

 O'Connell in working up the collections of fossils, the identification of 

 which has made possible the determination of the succession of the pale- 

 on tological zones and the correlation of the strata with synchronous ones 

 in Mexico and Europe. The Jurassic fauna, consisting mainly of am- 

 monites, has been described in a separate memoir, to be published at a 



1 Manuscript received by the Secretary of the Society February 6, 1922. 



(639) 



