LECHMERE GUPPY ON TERTIARY COAL. 
Ill 
The site of the discovery is on the Montserrat road, about 
half a mile from the railway between Union and Brothers. 
The workings are in the valley along which the road runs. 
The seam is from four to five feet thick, and the coal is 
apparently of fair quality, but so extremely friable that it 
falls on handling into very small pieces. This property is 
prejudicial to the value of the article. 
The dip of the bed is between 50° and 60° to the W.N.W., 
consequently the strike is about N.N.E. The containing 
strata are clays without fossils, probably belonging to the 
upper part of the miocene ( h , Fig. 3), lying unconformably 
upon the secondary rocks. The strata are probably the 
equivalents of the Caroni series ( h ", Fig. 3), but they are 
deposited on the opposite (southern) side of the neocomian 
ridge which traverses the middle of the island. Our know- 
ledge of the geological structure of this part of the country is 
extremely deficient owing to the want of exposures, without 
which no geologist could ascertain with precision the posi- 
tion and relations of the rocks. In Fig. 3 1 have endeavoured 
to present an improved view of the succession of the rocks 
of Trinidad, based upon the results of the geological survey ; 
but with such improvements as observations extending over 
fifteen years have enabled me to suggest. In this diagram 
h , Ji , h" , and ti" represent the miocene or tertiary coal- 
bearing formations, which probably pass up near the south 
coast into pliocene beds, which also include lignite and car- 
bonaceous shales. The extent of the eocene forma, tion is not 
clearly defined ; this formation does not contain beds of 
lignite so far as known, but many of its beds are impregnated 
with asphaltic products, which in my opinion are derived 
from the miocene formation. 
