XHE MIOCENE OF NORTHERN 

 COSTA RICA 



WITH NOTES ON ITS GENERAL STRATIGR APHIC 

 RELATIONS 



BY 



A. A. OLSSON 



I. Preliminary Remarks 

 II. General Stratigraphy of Northern Costa Rica 



III. The Costa Rican Miocene 



A. The Uscari Stage 



B. The Gatun Stage 



C. The Uscari - Gatun Unconformity 



IV. Correlation 



a. Santo Domingo Miocene 



B. BowDEN Beds, Jamaica 



C. Mexican Miocene 



D. The East Coast Miocene 



V. The Costa Rica Geosyncline 



