Album caption: Illinoian drift plain of remarkably long, gentle, uneroded slope.3 to 4 miles West of Winnebage, Illinois. SE from rather narrow ridge, crest near NW corner. S. of "Iowan border". June 14, 1908. Handwritten note on album caption: No. 381. Winnebago County, Plate 18- A in U.S. Geological Survey. Professional paper 106. 1918.
Summary
Album caption: Illinoian drift plain of remarkably long, gentle, uneroded slope.3 to 4 miles West of Winnebage, Illinois. SE from rather narrow ridge, crest near NW corner. S. of "Iowan border". June 14, 1908.
Handwritten note on album caption: No. 381. Winnebago County, Plate 18- A in U.S. Geological Survey. Professional paper 106. 1918.
Available in the U.S. Geological Survey Denver Library Photographic Collection, Alden, W.C. Collection.
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