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

LEGENDS FOR COLOR PHOTOS, SECTION C

Fig. 2(5).
Fig. 3(9).
Fig. 4(14).
Fig. 5(15).
Fig. 6(20).
Fig. 7(22).
Fig. 8(24).
Fig. 9(25).
Fig. 10(31).
Fig. 11(34).
Fig. 12(36)

The frozen beach near the south edge of the Cook Plant construction site. Ice row on the surface indicates totally frozen beach.
15 December 1970.
Southern edge of the Cook construction site. Frozen beach sand
extending to the water's edge and showing small-scale undercutting
and slumping due to wave action. Wave-tossed sand on the frozen
surface at left. 17 December 1970.
Frozen sand slab about 20 feet shoreward from the water's edge;
the skim of snow has been brushed away to show the glaze of spray
ice. At the sand-storage pile south of the Cook construction site.
29 December 1970.
Simple tabular spray-snow icefoot along the beach north of the Cook
plant site. Spray pattern visible on surface. 29 December 1970.
The simple ice rampart condition. Undercutting and cracking in
the foreground, and two newly developed blowholes beside the man
in middle distance. 29 December 1970.
The developed ice rampart, near the sand storage pile south of the
Cook plant construction site. Ice cones developed around blowhole
mouths. Numerous ice balls on the surface. 29 December 1970.
The collapsed rampart condition. Near the south side of the Cook
Plant property. Cracking, dropped blocks, and the water's edge
in the foreground. Four regularly spaced blowholes have spewed
sand onto the ice. The nearest blowhole is identified by a large
block of dark sandy ice, which is shown in detail in Figure 9(25).
29 December 1970.
Detail of Ridge A blowhole. Spray ice surface in background. Ice
balls and sand in foreground. The blowhole in left background.
Sun-warmed sand melting into ice in the ice block and other parts
of the foreground. 29 December 1970.
In the background is a push of brash (floe ice) which became Ridge B
in the winter of 1969-70. 12 January 1970.
Looking north from the temporary cofferdam at the Cook construction
site. From right to left: Ridge A (showing sand); Ridge B (center);
lagoon ice (left foreground to middle distance); and, at left, Ridge
C developing substantial blowholes. A large field of loose ice
lies outside (left) of Ridge C. 18 January 1971.
Looking northward from the cofferdam at the Cook construction site.
Ridge A, low and showing very sandy lumps, is at right close to the
beach; Ridge B, from center foreground, is calving blocks as a result of the water pumped from the construction excavation; lagoon
ice, from left foreground to center middle distance, is a relatively flat area of frozen ice floes; from left middle distance
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