Browse Items (748 total) for Calvin Geological Photographs

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Mill on the Oneota River , Florenceville, Iowa, late 1890s or early 1900s

Picture taken from bridge at Florenceville.

Men on railroad cars near Iowa Ballast and Construction Co., Maxon, Iowa, late 1890s or early 1900s

Men on pile of boulders, Forest City township, Iowa, July 4, 1925

Forest City Twp., lane between sections 13 and 32

Men in quarry in Devonian limestone, Cedar Valley Stage, Iowa City, Iowa, late 1890s or early 1900s

Men by conglomerate basal with lentils of unconformity near base, Montpelier, Iowa, late 1890s or early 1900s

Men around gushing well, Belle Plaine, Iowa, late 1890s or early 1900s

Men and boys surrounding “Jumbo” artesian well, Belle Plaine, Iowa, late 1890s or early 1900s

Artesian well/Jumbo well, 3 ft in diameter at surface, 195 deep through fine sand and blue clay. Bored with 2 inch drill. Water broke out. pressure 35 lbs to sq in.

Masses in situ on plain underlain by Buchanan gravels, Manchester, Iowa, late 1890s or early 1900s

Mass of limestone which crept down slopes over whole thickness of shales and fallen over cliff of Galena to end up 60 feet below the top of the Galena above the Little Maquoketa River, Iowa, late 1890s or early 1900s

Mason City Brick and Tile Company seen from northeast, Mason City, Iowa, late 1890s or early 1900s

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