
va ig hale ae 
1 iene Re = fa = 
Parr II. Seo. ii. §6.] ICEBERGS. © 425 
It is known as ground-ice or anchor ice. In the Labrador fishing- 
grounds it forms even at considerable depths. Seals caught in the 
lines at those depths are said to be brought up sometimes solidly 
frozen. 
B. In the Arctic regions vast glaciers drain the snow-fields, and, 
descending to the sea, extend for some distance from shore until 
large fragments break off and float away seawards. These detached 
b 
f (ieee 
3 
BS 


2 oP AD, 
Fic. 158.—Formation or Icuperes (B.). 
The glacier (a, h) descends from mountainous ground (b) to the sea level (s’, bearing 
moraine stuff on the surface, pushing on detritus below (d), and sending off ice- 
bergs (m), which may carry detritus and drop it over the sea-bottom ; #, t’, g, lines 
of high and low water. 
masses are icebergs. Their shape and size greatly vary, but lofty 
peaked forms are common, and they sometimes rise from 200 to 300 
feet above the level of the sea. As only about an eighth part of the 





























Fig. 159.—Arcrio IcEBERG SEEN ON PARRY’S FIRST VOYAGE. 
ice appears above water, these larger bergs may sometimes be from 
1600 to 2400 feet thick from base to top, though the submarine part 
of the ice may be as irregular in form and thickness as the portion 
