1960 Map of McCarthy D-4

About this map

Chisana Glacier dominates the northwestern landscape of this subarctic terrain, highlighting a region defined by extensive ice fields and high-altitude passes. The map documents a complex glacial network including the Lime Glacier and Middle Fork Glacier, where numerous crevasses are charted across the moving ice. The presence of Frederika Mountain and the nearby Frederika Glacier provide a clear view of the topographical relationship between these peaks and the ice flows they anchor. This mid-century survey serves as a vital record of the ice extent before modern climatic shifts, capturing features like the Jumpoff Icefall and the navigable Bow Pass. Toward the southwest, the Rohn Glacier and Shelter Valley Glacier converge in a high-elevation wilderness devoid of permanent settlements or roads, emphasizing the isolation of this portion of the Wrangell Mountains.