The nine glaciers are:
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The Lemon Creek Glacier
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The Blue Glacier
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The Polychrome Glacier
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The West Gulkana Glacier
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The Worthington Glacier
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The Little Jarvis Glacier
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The Bear Lake Glacier
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The Chikuminuk Glacier
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The McCall Glacier
All these glaciers are situated in various part of Alaska, except the Blue Glacier which is in Washington State.
The maps were made, mainly in 1957–58, by vertical air photography with ground control but some of them have not been finally “field-checked.”
The reproduction is very good indeed and gives much detail–moraines, snow, firn, ice, crevasses, etc. The contour interval on the glaciers is 5 metres and in the surrounding terrain 25 metres. The scale in each case is 1:10,000. On each map there is a small-scale plan showing the exact position of the glacier.
Accompanying the maps there is a pamphlet, reference as above, which sets out in satisfactory detail the conditions under which the project was carried out, with the mapping and organizational problems and much other information. There are also three appendices giving full particulars of the location of, and access to, the glaciers, glaciological notes and a list of the reports on which the map-making was based. It also contains very fine illustrations of particular features on some of the glaciers.
These maps and the pamphlet constitute a valuable addition to our knowledge of North America glaciers and should prove of great value for future research, particularly in connection with the fluctuation trends over this vast area.
G. Seligman
