9 2 



The National Geographic Magazine 



Outline Map of Unimak Island 



issue at a much lower level streams 

 which spread out into broad and shallow 

 water-courses (apparently dry at this 

 season of the year) over the very gentle 

 slopes to the sea. These lower slopes 

 seem to be covered with ashes and 

 scoriae, and when the wind blows clouds 

 of dust are driven along with them. The 

 ridge connecting Shishaldin with its 

 neighbor to the eastward is probably not 

 more than 2,000 feet above the sea. 



ISANOTSKI PEAKS 



Eight and a half nautical miles east- 

 northeast from the summit of Shishal- 



of Isanotski 

 peaks are 



N 



f& N.Pk. 



c^S 



-£". 



S.Pk. 



din are the double peaks 



Mountain. When these 



closely studied in their 



varying aspects, from 



broad to slender, from 



Ikatan Bay and around 



to the westward of"^~ 



them in Unimak Bay, 



they are seen to be the 



remains of the rim of 



a crater disposed something like this. 



The points determined in the triangu- 

 lation are the very highest pinnacles on 

 the two remnants of the rim. If this 

 theory is right, the mountain may at 

 some time have rivaled Shishaldin in 



