Winter operations, 1970-1971 / John C. Ayers, Norbert W. O'Hara, William L. Yocum.

chunk of Ridge D the day before has now become broken and is being carried
away.
Figure 28(127) gives the condition of the same area at about 1400 on
3 March. All the remaining ice of the second lagoon has been broken up and removed by increasing wind from the northwest.
The rising wind and the heavy content of ice, slush, and iceballs in the
water gave, later in the afternoon of 3 March, a dramatic demonstration of the
rejuvenation of an ice ridge (in this case Ridge C).
Figure 29(129) depicts rapid augmentation of Ridge C by the readily freezable contents of the water that is being thrown upon it. Ridge B in the right
foreground is, and has been, sheltered from such activity. On this ridge the
action of solar energy upon the sand incorporated into the ice has not only
covered the ridge with a lag-concentrate of sand, but has produced differential
melting of the iceballs within the ridge.
Figure 30(130) is a detail of the surface of Ridge B at the time Ridge C
was receiving active augmentation on 3 March. Sun-warmed sand has melted the
ice, and in doing so has accumulated on the ice surface. Iceballs of Ridge B
have been sun-melted to about the degree that they contained sand in their ice.
Figure 31(131), taken later in the afternoon of 3 March, shows not only extensive augmentation of Ridge C but an active blowhole.
Still later in the afternoon other blowholes in the area off the Cook
Plant construction site were active. Figure 32(137) shows one of these and
slush/spray being deposited onto the face of the ridge to the right.
In Figure 33(140) a wave breaking onto the face of Ridge C is caught in the
act of throwing spray, slush, and iceballs onto the face of the ridge.
The Demises of the Shore Ice
The Quiet Demise
In the spring of 1970 the shore ice departed quietly. Figure 34(141) shows
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