GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONE. 273 



ANTIGUA-BARBUDA BANK. 



The islands of Antigua and Barbuda rise from a bank which is 

 bounded by the 100-fathom curve and is 50 miles in length along a 

 north-south line, and from 13 to 20 miles in width. Antigua is near 

 the southern and Barbuda near the northern end, with water from 

 15 to 18 fathoms in depth between them. (See text fig. 9.) 



133 



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Fig. 9.— Chart of antigua— bakbuda bank. From U. S. hydrographic chart no. 2318. Scale, 1 



INCH = ABOUT 12.8 NAUTICAL MILES. 



The shore line of Antigua is deeply indented by numerous bays 

 and harbors, as St. John, Five Islands, and Falmouth harbors, and 

 Willoughby, Nonsuch, and Belfast bays (pi. G8, figs. A, B, and 

 text fig. 10). The absence of terraces and elevated wave-cut cliffs 

 is especially noteworthy. The discovery in St. John Harbor, at a 

 depth of 20 feet below sea level, of a 4-foot bed of peat, which 



