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Collection: Calvin Geological Photographs
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Outcropping, Winterset, Iowa, late 1890s or early 1900s
Located along the road south from Winterset.
Hertha Limestone located about 200 feet west of Iron Bridge and south of Squaw Creek, Osceola Township, Iowa, late 1890s or early 1900s
Located in Osceolo Twp., about 200 feet West of Iron Bridge, South of Squaw Creek, in the NW 1/4 of the NW 1/4 of section 6.
Bethany Falls Milestone, Clarke County, Iowa, late 1890s or early 1900s
Ward Twp., SE 1/4 of the NE 1/4 of section 2
Dome of the courthouse in Nishnabotna River valley, Atlantic, Iowa, late 1890s or early 1900s
Looking N.W. across the valley.
Dark brownish sandstone, Lewis, Iowa, late 1890s or early 1900s
Located on the east side of the road one mile south of Lewis.
Surface of an alluvial fan at the foot of the Sierra Mountains in Owens Valley, Calif., late 1890s or early 1900s
Block of reticulated Galena Dolomite, late 1890s or early 1900s
Brachiopods and Orthidae fossils
Bridge over Coon Rapids, Middle Raccoon River, Coon Rapids, Iowa, late 1890s or early 1900s
Group photo from the International Geological Conference, Canada, 1913
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