,& 



THE 





AMERICAN JOURiNALOFSCIENCE 



[FOURTH SERIES.] 



Akt. XYIII. — Geology of Bermuda Island ; the Igneous 

 Platform ; by L. Y. Persson. 



Introductory. — A brief preliminary paper by the writer and 

 Dr. T. Wayland Yaughan,* of the United States Geological 

 Survey, stated that a deep boring had been recently made in 

 Bermuda Island, which, after passing through the lime car- 

 bonate deposits, was continued for a long distance in volcanic 

 rocks. 



The object of the paper was merely to give notice of the 

 investigation and of our being at work in this field. The study 

 of the volcanic rocks, and that part of the general geology of 

 the island connected with them, has been undertaken by the 

 writer, and the results of this work are embodied in the present 

 paper. The investigation of the lime carbonate deposits and 

 their bearing on the later geologic history of the island, espe- 

 cially on its coral reef problems, is being carried out by 

 Doctor Yaughan, assisted by Doctor Jos. A. Cushman, of the 

 United States Geological Survey, who has made a special study 

 of the Foraminifera contained in the samples, and the results 

 of their part of the work will be given at a later date. 



Origin of the Boring. — The manner in "which this deep 

 boring was put down in Bermuda Island has been stated in the 

 preliminary paper, but for convenience may be briefly recapitu- 

 lated here. It was undertaken by the owners of the Princess 

 Hotel, a large modern house which attracts many visitors, espe- 

 cially from the eastern American cities, in the winter months. 

 The managers have found the problem of maintaining a supply 

 of fresh water adequate to the needs of such an establishment 

 at times difficult, since in Bermuda the chief dependence is on 

 rainfall stored in cisterns. In some manner the owners were 

 persuaded that it might be worth while to risk the capital nec- 



*This Journal, xxxvi, p. 70, 1913. 



Am. Jour. Sci.— Fourth Series, Vol. XXXVIII, No. 225.— Sept., 1914. 

 14 



