HILL: GEOLOGY OF JAMAICA. 169 
their relations are harmonious. I shall also be able to show a remark- 
able difference in some respects between the formation of the Great 
Antilles and tho Caribbee Islands. 
In Cuba and Haiti alone of the West Indies (excepting Trinidad, 
Which is as much South American as is Long Island a part of the 
Now England coast) is it at all probable that: Pro-Cretaceous or older 
tocks than in Jamaica are exposed, although theoretically it is even 
Possible that the submerged portions of all the West Indies including 
Jamaica may have a Paleozoic foundation. Cuba and Haiti it should 
bo remembered, with Porto Rico and the Virgins, are in the main 
xia] line of the Antillean uplift, and it is highly probable that older 
rocks occur in them, while Jamaica is an outlier or offshoot of this 
Main axis, 
The Cuban rocks also contain some mica schists and other classes 
of rocks which as yet have not been found in Jamaica except in the 
later débris, Henneken,! and perhaps others, have described micaceous 
Schists of supposedly Pre-Cretaceous age in San Domingo. Duchassaing ? 
i) from St. Thomas. 
has described a Paleozoic coral (Favosites Die 
Cleve,’ however, was inclined to believe that this specimen is not native 
to the island. 
Castro and Salterain* consider that in Cuba there occurs a consider- 
able range of Pre-Cretaceous rocks, some of which were questionably 
Considered and mapped as Paleozoic, Salterain has referred certain 
formations, notably in the western province of Pinar del Rio, which the 
Writer has not had opportunity of personally studying, and an area 
Near the city of Trinidad, to the Paleozoic, Triassic, and Jurassic 
Periods, 5 
With the exception of the foregoing, and certain observations of 
trazer and Bergt to be noted later concerning the islands of Cuba 
and llaiti, there are no records of exposures of any Pre-Cretaceous 
[ek On Some Tertiary Deposits of San Domingo. Quart. Jour. Geol. Soc. London, 
2». Vol. IX. p. 116, 
- Mem. della Acad. dell. Scien. di Torino, 11 ser., Tom. XIX. p. 84, 1860, and 
RS 1860, Tom. XXIII. p. 199. 
| Geology of the Northeastern West Indian Islands. By P. T. Cleve. Stock- 
'olm, 1871. 
* Croquis de la Isla de Cuba, 1869-1883. 
i Lea has also described from near Havana two Brachiopods, Terebratula pocyana 
“nd Rhynchonella tayloriana, which are very similar to certain forms from the 
Wrassic of Mexico and South America.’ See Trans. Amer. Phil. Soc., Phila., 1841, 
ol. VIL. pp. 258-260, Pl. X. Figs. 12 and 13. 
N 
n t i i ert a- 
