

1870 



1978 



ERROL 



ISLAND 



GULF OF MEXICO 



Figure 22. Historical map comparison of the Chandeleur Island arc showing 

 its landward transgression into Chandeleur Sound. 





CHANDELEUR 

 LIGHTHOUSE 





<b° 



I 



NORTH 

 ISLANDS ^ 



/ 



NEW ' 1 

 HARBOR , , 



FREE \k ISLANDS ,^/jlJ ^ 

 MASON J ..'.'^ <J. 



ISLANDS >r.i a 



PALOS ISLANo/y ^ 



BOOT ISLAND 



STAKE ISLAND, 

 CURLEW ISLAND 



GRAND 



GOSIER "^ 



ISLAND/ 



BRETON 

 ISLAND 



LONGSHORE 



TRANSPORT 



DIRECTION 



Figure 23. Average annual erosion-accretion along the Chandeleur Islands. 



34 



