A GEOLOGICAL RECONNAISSANCE IN HAITI 743 
Age and correlation.—On the general correlation table these 
sediments are shown in part as Oligocene and Miocene to correspond 
with Maury’s determinations in the Yaqui Valley of Santo Domin- 
go. What is here called the Maissade is undoubtedly the equivalent 
of the Sconsia laevigata and the A phera islacolonis formations in 
Maury’s section™ and the equivalent in part of Hill’s Bowden in 
Jamaica. This places the Maissade in the Miocene and it repre- 
sents probably lower and middle Miocene. ‘This being the case, 
Fic. 7.—Hills formed by upturned Las Cahobes beds near Las Cahobes 
at least the upper part of the Las Cahobes beds are the equivalent 
of the Orthaulax inornatus formation of the Yaqui section, which 
Maury places in the Oligocene. In general lithologic characters 
the beds so far correspond well to the Santo Domingo section, and 
while the work so far done in Haiti along paleontologic lines is 
merely the result of a few minutes collecting here and there, never- 
theless there is a striking similarity in faunas, sufficient no doubt 
to make the correlation definite. 
According to Gabb? the entire thickness of the lower members 
including the Orthaulax inornatus is only 600 feet. It seems evident 
that the entire section is not developed in Santo Domingo and 
that in Haiti the larger part of the entire thickness of sediments lies 
1 Op. cit. 2 Op. cit., Pp. 05- 
