76 



E. V. DINVILLIERS — PHOSPHATE DEPOSITS OF NAVASSA. 



Configuration. — A reef surrounds the island at a distance of about 2,000 

 to 2,300 feet from the cliff, except on the western side, Avhere it extends out 

 for over 4,000 feet from the present shore line. The soundings, expressed in 

 meters (1 meter = 3.397 feet), show the depth of water on this reef to vary 

 from 22 meters along the western shore to about 36 meters along the edge 

 of the reef, except at one point at the extreme western end of the island 

 where a small local reef is covered in places by only 3 to 7 meters of water. 

 Immediately outside the reef line the depth of water increases rapidly to 45 

 meters, or 153 feet, Avith a steep sea slope. 





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Figure 1 — Map of the Island of Navassa, West Indies. 

 Scale, 1 : 40,000, or about 0.6 mi. = 1 inch ; soundings expressed in meters ; magnetic declination 

 (in 1862), 4° 2o' E. 



The northern side of the island, while greatly indented, presents from the 

 sea a comparatively straight face, 7,500 feet long, between the two prominent 



