Album caption: Frost cracks and ponds, north shore, Alaska. Index card: Frost crack lying between parallel ridges which enclose depressed polygonal blocks on Flaxman Island. Canning district, Northern Alaska region, Alaska. ca. 1910. Notes: Published in U.S. Geological Survey Professional paper 109, Plate XXIX-B. 1919.
Summary
Album caption: Frost cracks and ponds, north shore, Alaska.
Index card: Frost crack lying between parallel ridges which enclose depressed polygonal blocks on Flaxman Island. Canning district, Northern Alaska region, Alaska. ca. 1910.
Notes: Published in U.S. Geological Survey Professional paper 109, Plate XXIX-B. 1919.
.Available in U.S. Geological Survey Photographic Collection, Leffingwell, E. Collection.
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