RATE OF RECESSION 



75 



between the points indicated. The distances are measured 

 parallel to the direction of the ice movement. 



Table I — Rate of Retreat of the Ice Border 









Time of Re- 



Rate of 



Localities 



Distance 



treat in 



Retreat a 









Years 



Year 



i to 7 



24.2 miles 



= 127,776 feet 



About 525 



243 feet 



None with bottom 



38.9 km. 







74 m. 



7 to 17 



5.2 miles 



= 27,456 feet 



About 330 



83 feet 



None with bottom 



8.4 km. 







26 m. 



7 to 24 



19 miles 



= 100,320 feet 



> 1,000 



<ioo feet 



24 with bottom 



31 km. 







<3i m. 



7 to 28 



35.8 miles 



= 189,024 feet 



About 1,630 



116 feet 



None with bottom 



57.6 km. 







35 m. 



24 to 28 



16.8 miles 

 27.1 km. 



= 88,704 feet 



About 270 



328 feet 

 100 m. 



28 to 29 



12.8 miles 



= 67,584 feet 



About 350 



193 feet 



None with bottom 



20.8 km. 







59 m. 



29 to 31 



12.4 miles 



= 65,472 feet 



About 275 



238 feet 



None with bottom 



20.1 km. 







73 m. 



31 to 40 



19.5 miles 



= 102,960 feet 



>300 



<343 feet 



40 with bottom 



31.4 km. 







<I05 m. 



45 to 59 



15.2 miles 



= 80,256 feet 



About 275 



292 feet 



Bottom almost 



24.4 km. 







89 m. 



reached at both 











59 to 60 



7.2 miles 



— 38,016 feet 



<I73 



>220 feet 



Depth to bottom 



1 1. 6 km. 







>67 m. 



at 60 unknown 











