16 



MARION EXPEDITION TO DAVIS STRAIT AND BAFFIN BAY 



Ice Fuoes and Ice Field 



FiGUUE 5. — A view of sea ice to illustrate the terms " ice floes " and " ice field." 

 A floe is any ice area from one-third of a mile in diameter to as far as can be 

 seen from a ship. An ice field is an area so great that its limits are beyond the 

 vision of the masthead lookouts. This scene has all the appearance of the 

 southern edge of the pack which reaches the Grand Bank, south of Newfoundland 

 every spring. (Photogi-aph by F. A. Matisen in Kolchak, 1909.) 



Glacons 



FiGUUE 6. — Sea ice in the form of glagous ; the ti'rm used to designate any piece of 

 sea ice ranging in size from a cake 2 to 3 feet in diameter to an ice area of 

 one-third of a mile in diameter. (Photograph from Arctowski (1908a).) 



