Browse Items · Iowa Heritage Digital Collections
Iowa Heritage Digital Collections
State Library of Iowa
Advanced Search

Browse Items (71585 total)

Cliffs, Clay Mill, Iowa, late 1890s or early 1900s

Cliffs, Clay Mill, Iowa, late 1890s or early 1900s

Photograph taken from Mill.
Thin bedded Niagara and flagstone beds of Syringopora tenella zones in the upper cliffs, Jefferson Township, Balltown, Iowa, late 1890s or early 1900s

Thin bedded Niagara and flagstone beds of Syringopora tenella zones in the upper cliffs, Jefferson Township, Balltown, Iowa, late 1890s or early 1900s

Unconformity between Carboniferous and Devonian, Montpelier, Iowa, late 1890s or early 1900s

Unconformity between Carboniferous and Devonian, Montpelier, Iowa, late 1890s or early 1900s

Concretionary structure in Carboniferous near Prairie Creek, Iowa, late 1890s or early 1900s

Concretionary structure in Carboniferous near Prairie Creek, Iowa, late 1890s or early 1900s

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

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

Exposure of Upper Coal Measures and Carboniferous, Hawleyville, Iowa, late 1890s or early 1900s

Exposure of Upper Coal Measures and Carboniferous, Hawleyville, Iowa, late 1890s or early 1900s

Falls in Carboniferous forms on Indian Spring, Burlington, Iowa, late 1890s or early 1900s

Falls in Carboniferous forms on Indian Spring, Burlington, Iowa, late 1890s or early 1900s

Jointed structure in Carboniferous sandstone, Montpelier, Iowa, late 1890s or early 1900s

Jointed structure in Carboniferous sandstone, Montpelier, Iowa, late 1890s or early 1900s

Carboniferous outlier, Iowa City, Iowa, late 1890s or early 1900s

Carboniferous outlier, Iowa City, Iowa, late 1890s or early 1900s

Cavern in Carboniferous sandstone, Wild Cat Den State Park, Iowa, late 1890s or early 1900s

Cavern in Carboniferous sandstone, Wild Cat Den State Park, Iowa, late 1890s or early 1900s