A GEOLOGICAL RECONNAISSANCE IN HAITI 
A CONTRIBUTION TO ANTILLEAN GEOLOGY 
WILLIAM F. JONES 
Massachusetts Institute of Technology, Cambridge, Mass. 
CONTENTS 
INTRODUCTION 
TOPOGRAPHY 
STRATIGRAPHY 
A. Pre-Tertiary Rocks 
Old Complex 
Cretaceous 
B. Early Tertiary Limestones 
C. Tertiary Clastic Sediments 
General 
Divisions 
1. Lower—Thomonde Beds 
2. Middle—Las Cahobes Beds 
3. Upper—Maissade Beds 
Age and Correlation 
Relations of Limestones to Clastic Sediments 
The Tertiary Series of the South Peninsula 
Late Tertiary and Quaternary Deposits 
Pliocence(?) Beds of the Central Plain 
Terrace Deposits 
Elevated Coral Reefs and Marginal Deposits 
IGNEOUS Rocks 
Syenite-Granite 
Quartz-Diorite 
Andesites 
Basalts 
GEOLOGIC STRUCTURE 
INTRODUCTION 
The following paper is the result of observations made during 
several months’ work in Haiti during the spring and summer of 
t918 while engaged on private work. ‘The localities visited for 
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