16 



MARION EXPEDITION TO DAVIS STRAIT AND BAFFIN BAY 



Ice Floes and ice Field 



Figure 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. (I'hotograph by F. A. Matisen in Kolchak. 1909.) 



Glacons 



Figure C. — Sea ice in the form of ghu.'ous ; the term used lo designate any piece of 

 sea ice ranging in size from a cake 2 to 8 feet in dianieter to an ice area of 

 one-third of a mile in diameter. (Photograph from Arctowski (I'.tOSa).) 



