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Peat and forest bed of Sangamon, interglacial interval, underlain by Illinoian Drift, overlain by Iowan loess and Wisconsin Drift east of Peoria, Ill., late 1890s or early 1900s

Peat and forest bed of Sangamon, interglacial interval, underlain by Illinoian Drift, overlain by Iowan loess and Wisconsin Drift east of Peoria, Ill., late 1890s or early 1900s

Pebble analyses of the Kansas and Nebraska drifts, late 1890s or early 1900s

Pebble analyses of the Kansas and Nebraska drifts, late 1890s or early 1900s

Pebble band in Iowan till, Liberty Township, Iowa, July 4, 1925

Pebble band in Iowan till, Liberty Township, Iowa, July 4, 1925

Located in the west side of section 7 of Liberty Township.

Pebble band on Iowan till, Fremont Township, Iowa, July 8, 1924

Pebble band on Iowan till, Fremont Township, Iowa, July 8, 1924

Located in the middle of line between Sections 1 and 2 in Fremont Township.

Pebble band on Iowan till, Fremont Township, Iowa, July 8, 1924

Pebble band on Iowan till, Fremont Township, Iowa, July 8, 1924

Located in the middle of line between Sections 1 and 2 in Fremont Township.

Pekay Mine, Pekay, Iowa, late 1890s or early 1900s

Pekay Mine, Pekay, Iowa, late 1890s or early 1900s

Southwestern view.

People at residence of Payne and Arnold near Minnekahta, S.D., late 1890s and early 1900s

People at residence of Payne and Arnold near Minnekahta, S.D., late 1890s and early 1900s

People near cabin at ballast burning camp, Maxon, Iowa, late 1890s or early 1900s

People near cabin at ballast burning camp, Maxon, Iowa, late 1890s or early 1900s

People near Dakota and Benton formations near Old Crills Mill on Sioux River below Westfield, Iowa, late 1890s or early 1900s

People near Dakota and Benton formations near Old Crills Mill on Sioux River below Westfield, Iowa, late 1890s or early 1900s

People near Dakota and Benton formations near Old Crills Mill on Sioux River below Westfield, Iowa, late 1890s or early 1900s

People near Dakota and Benton formations near Old Crills Mill on Sioux River below Westfield, Iowa, late 1890s or early 1900s

First
Previous
43
44
45
46
47
48
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53
54
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