188 



Bulletin 35 



33^ 



PAPER No. 25. 



OBSER VA TIONS ON THE GEOE OG Y OF MAR TIN 10 UE 

 WITH NOTE ON FOSSILS FROM TRINIDAD 

 AND VENEZUELA. 

 Agr. Soc. Trin. and Tob. ; Society Paper No. 549. 

 Read before the Society Apr. 11, 191 3 and published in the 

 "Proceedings" for Apr., 191 3, vol. 13, pp, 159-163. 



Page 1 



Jules Maingot, Esquire, of Arima, having kindly furnished 

 me with a copy of a paper by Mr. Dublancq-Laborde of Martin- 

 ique on the existence of calcareous blocks in the ancient tufs of 

 Mont Pelee I was by him placed in communication with that gen- 

 tleman with a view to gaining same further information on the 

 geology of Martinique, and especially with reference to the re- 

 marks of Dr. Watts made on the reading of my paper at the 

 Queen's College in January 191 2— which paper was duly pub- 

 lished in the Proceedings of the Society. Mr. Dublancq Laborde 

 was kind enough to supply me with ample information respecting 

 the calcareous blocks in question and with specimens of the rocks 

 and photographs of the organic remains found in them. 



For particulars as to the mode of occurrence of these calcar- 

 eous blocks I must refer to Mr. Dublancq-Laborde' s paper pub- 

 lished in the "Comtes rendus des Seances de 1'Academie des Sci- 

 ences" t. 154, P. 824. It is sufficient to state here that these 

 calcareous blocks lend a considerable support to the theory of Dr. 

 Watts. They appear in some cases to have been thrown out 

 with bombs and ejectamenta discharged by Mont Pelee and other 

 volcanic vents in Martinque. They contain fossil Foraminifera 



Page 2 



and Algae namely, Amphistegina and other Foraminifera and 

 Lithothamnion. Similar Foraminifera occur in the Miocene rocks 

 of Trinidad and Barbados, and the Lithothamnion is a compon- 

 ent of some of those of the latter Island. It seems further that 

 in some of these rocks eocene fossils such as Orbitoides occur, for 



