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Jim Creek from the pipe line, Jamestown, Colo., late 1890s or early 1900s

Jim Creek from the pipe line, Jamestown, Colo., late 1890s or early 1900s

Jim Creek canyon and part of roadway above Seltzer Spring on the way to Jamestown, Colo., late 1890s or early 1900s

Jim Creek canyon and part of roadway above Seltzer Spring on the way to Jamestown, Colo., late 1890s or early 1900s

Iron mine, Waukon, Iowa, late 1890s or early 1900s

Iron mine, Waukon, Iowa, late 1890s or early 1900s

Located at Waukon, Northeast of, Twp. 99, R. VI, Section 36, N. W. gr., S. E. 1/4

Iron bridge with piers of Devonian Limestone, North Liberty, Iowa, late 1890s or early 1900s

Iron bridge with piers of Devonian Limestone, North Liberty, Iowa, late 1890s or early 1900s

Located northwest of North Liberty.

Iowan topography in northwest Iowa, Liberty Township, Iowa, 1925

Iowan topography in northwest Iowa, Liberty Township, Iowa, 1925

Located in Liberty Twp., middle of South line, section 34.

Iowan till over Kansan gumbotil, soil on top of the gumbotil, Wayne Township, Iowa, July 8, 1924

Iowan till over Kansan gumbotil, soil on top of the gumbotil, Wayne Township, Iowa, July 8, 1924

View looking east near middle of north line of Section 30 in Wayne Township.

Iowan stage boulders in field, Winthrop, Iowa, late 1890s or early 1900s

Iowan stage boulders in field, Winthrop, Iowa, late 1890s or early 1900s

Iowan geologist J.T. Lonsdale, Iowa, late 1890s or early 1900s

Iowan geologist J.T. Lonsdale, Iowa, late 1890s or early 1900s

Iowan Drift area topography, Spring Rock Township, Iowa, June 18, 1925

Iowan Drift area topography, Spring Rock Township, Iowa, June 18, 1925

Located in Spring Rock Twp. on the middle of line between sections 6 and 7.

Iowan Drift area topography, Massilon Township, Iowa, July 18, 1925

Iowan Drift area topography, Massilon Township, Iowa, July 18, 1925

Located in Massilon Twp. middle of section 33.

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