A GEOLOGICAL RECONNAISSANCE IN HAITI 745 
below anything yet described in the Antilles. Below the A phera 
islacolonis formation of Maury we are dealing with formations 
which are absent in Jamaica, and below the Orthaulax inornatus 
and underlying beds of Santo Domingo we are dealing with forma- 
tions which have probably not been encountered elsewhere in the 
Antilles. 
Limestones and marls of upper Oligocene age are widespread in 
Cuba and only two isolated and local formations occur there which 
may be of early Oligocene age and both of these are doubtful. 
Berkey’ places his Arecibo formation of Porto Rico as extending 
through Oligocene and Eocene but Maury® believes that it will 
prove to be the equivalent of the Santo Domingo section. 
Vaughan’s‘ correlation table shows the ‘“‘ Pepino,”’ of Porto Rico, 
equivalent to the lower horizon in Santo Domingo, which is middle 
Oligocene. In Jamaica, then, the middle and upper Oligocene are 
missing. In Cuba the upper, in Porto Rico the middle, and in 
Santo Domingo both upper and middle, Oligocene are present. It 
is thought, at least from Hill’s description, that the entire Oceanic 
series (limestones) of Jamaica is present in Haiti. If this is true 
then either the lower horizon in Santo Domingo does not occupy 
all of middle Oligocene time or the Oceanic series of Jamaica does 
not extend to middle Oligocene; for in Central Haiti, between the 
two and forming a conformable series, is a large thickness of sedi- 
ments which is apparently absent elsewhere in the Antilles. 
RELATIONS OF EOCENE-EARLY OLIGOCENE LIMESTONES AND OLIGOCENE- 
MIOCENE SEDIMENTS 
The foregoing notes will indicate a stratigraphic problem of 
some interest. First, in Haiti there is a thick series of sediments of 
Oligocene-Miocene age in which the lower and major part is con- 
fined to the Oligocene, and this part has apparently not been noted 
or described heretofore. Secondly, this series rests apparently 
t Bailey Willis, “Stratigraphy of North America,” U.S. Geol. Survey, Prof. Paper 
Wily, WOW Os 7/22 
2 Op. cit.,p. 209. 3 Op. cit., Bull. 30, p. 41. 
4T. W. Vaughan, ‘Correlation of Tertiary Geological Formations of Southeastern 
United States, Central America and the West Indies,” Washington Acad. Sci., Proc., 
VIII, 1918, 268-76. 
