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Bulletin 35 
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Explanation of Diagram. 
Fig. I shows approximate!}- the lines of the principal dislocations 
which have affected the older rocks of Trinidad, and produced the 
Gulf of Paria and the Bocas. 
Fig. 2 is a diagram showing the probable extent of the subsidence 
by which the Bocas and Gulf of Paria were produced. 
Fig 3 shows the general succession of the Rocks of Trinidad — a 
b, c, d, Caribean Group ; e, compact limestone ; /, secondary rocks ; 
g, eocene of Tamana and Manzanilla ; g', eocene of Sanfernaiido ; /i, 
miocene of Guaracara ; h' , miocene of South Naparima : h" , miocene, 
of Couva, Savanetta, Pointe Noir, etc. ; h"' , miocene and pliocene of 
Moruga, Mayaro, etc. ; f, post pliocene or detrital series. 
* Principal dislocations or faults. 
Figs. 4 and 5 are referred to in Mr. Wall’s report. 
