proceedings: geological society 489 



Discussion: T. Wayland Vaughan stated the results of his expedi- 

 tion to Antigua, St. Bartholomew, and Anguilla in 1914, and gave a 

 resume of the present status of the geologic correlation of the Cretace- 

 ous and Tertiary formations of the Antilles. 



Cretaceous: The peculiar Upper Cretaceous fauna of Jamacia has 

 also been found in Cuba and St. Thomas. Hill has noted in Porto 

 Rico "volcanic tuffs and conglomerates with interbedded Cretaceous 

 rudistean limestone similar to that of Jamacia," thereby confirming a 

 previous inference of Cleve that the same horizon which he found in 

 St. Thomas also occurred in Porto Rico. Quin figures a specimen of 

 Barrettia from the "Blue-beach'' formation of St. Croix and a similar 

 fauna occurs in Mexico. This fauna is closely related to that of Gosau, 

 Austria. Gabb reports Cretaceous in Santo Domingo. 



Eocene: Miss Maury has described from the lower beds of Soldado 

 rock, Trinidad, a fauna which corresponds to that of the Midway group 

 in Alabama, and she correlates the fauna of the uppermost bed of 

 Soldado rock with that of the Wilcox group. Vaughan's studies of 

 the fossil corals of Jamaica and St. Bartholomew resulted in the cor- 

 relation of the Richmond and Catadupa beds of Jamacia with the 

 coraliferous limestone in St. Bartholomew. These deposits appear to 

 correspond to the Ocala limestone of Florida and Georgia. The same 

 or a closely related horizon is represented in Oriente Province, Cuba, 

 in Panama, and in the island of Trinidad. Hussakof has described 

 an Eocene marine fish from Antigua. 



Oligocene: Vaughan in 1900 correlated the fossil coral reef beds 

 of Antigua with the base of the Chattahoochee formation of Bainbridge, 

 Georgia. Dall identified Or^/2aM/a.T in collections from Antigua, show- 

 ing that the deposits correspond to the upper group of Oligocene 

 deposits in the southern United States. This horizon or a closely re- 

 lated one has been recognized by Vaughan through collections from the 

 following localities: 4 miles west of Lares, Porto Rico; in Oriente 

 Province, Cuba: in Province of Pinar del Rio, Cuba; in eastern Mexico; 

 and in the island of Arube, Netherlandic West Indies. The lower 

 part of the fossiliferous marls and limestones of Anguilla are slightly 

 younger. They may be correlated with the upper portion of the 

 Chattahoochee formation of Georgia and Florida, with the Tampa 

 formation of Florida, and with the Emperador limestone of Panama. 

 Dall has shown that this, or a closely related horizon, is found in Santo 

 Domingo. Dall has indicated parallelism between the Bowden beds 

 of Jamaica and the Chipola horizon in Florida. The Bowden horizon, 

 as is shown by fossil corals, is present at several places in eastern Costa 

 Rica. Perhaps the upper part of the Anguilla limestone and marls 

 may be of this age. Upper Oligocene deposits are wide- spread in Cuba, 

 Costa Rica, and Panama. ' 



Miocene: As no undoubted Miocene has been identified in the West 

 Indies, this is supposed to have been a period of high uplift. 



Pliocene: Pliocene has not been positively identified in the West 

 Indies, but some of the fossil corals from Santo Domingo are sug- 



