Calvin Image Database Search

Geology of Winneshiek Co., Iowa


Cliff of Trenton Limestone

Photograph details:
Location: U.S., Iowa, Winneshiek Co.; Bluffton, on the Oneota River.

Geologic Age: Ordovician, Trenton Limestone.
Photographed by: Samuel Calvin. Lantern Slide No. 1604.
Photograph No. 9


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Oneota River, near Bluffton

Photograph details:
Location: U.S., Iowa, Winneshiek Co.; Oneota River, near Bluffton.

Geologic Age: Ordovician-Silurian, Galena Limestone.
Photographed by: Samuel Calvin.
Photograph No. 12


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Plymouth Rock

Photograph details:
Location: U.S., Iowa, Winneshiek Co.; On river near Bluffton.

Geologic Age: Ordovician, Galena Limestone.
Photographed by: Samuel Calvin. Lantern Slide No. 2615.
Photograph No. 13


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Cold Spring, cliff of Trenton Limestone

Photograph details:
Location: U.S., Iowa, Winneshiek Co.; Bluffton, above.

Geologic Age: Ordovician, Trenton Limestone.
Photographed by: Samuel Calvin. Lantern Slide No. 1592.
Photograph No. 19


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Galena Limestone on the Oneota, above Bluffton

Photograph details:
Location: U.S., Iowa, Winneshiek Co.; Bluffton, above.

Geologic Age: Ordovician, Galena Limestone.
Photographed by: Samuel Calvin. Lantern Slide No. 1601.
Photograph No. 33


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Cliffs of Galena Limstone

Photograph details:
Location: U.S., Iowa, Winneshiek Co.; Bluffton, near, on Oneota River.

Geologic Age: Ordovician, Galena Limestone.
Photographed by: Samuel Calvin. Lantern Slide No. 1605.
Photograph No. 46


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Photograph details:
Location: U.S., Iowa, Winneshiek Co.; Bluffton, above bridge at.

Geologic Age: Ordovician, Galena (Trenton) Limstone.
Photographed by: Samuel Calvin. Lantern Slide No. 1590.
Photograph No. 56

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Cliff of Trenton Limestone, crowned with pines

Photograph details:
Location: U.S., Iowa, Winneshiek Co.; Bluffton, above; top of bluff at Cold Spring.

Geologic Age: Ordovician, Trenton Limestone.
Photographed by: Samuel Calvin. Lantern Slide No. 1591.
Photograph No. 64


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Upper Iowa or Oneota River

Photograph details:
Location: U.S., Iowa, Winneshiek Co.; Decorah, Upper Iowa or Oneota River.

Geologic Age: Ordovician, Trenton Limestone.
Photographed by: Samuel Calvin. Lantern Slide No. 1610.
Photograph No. 1998


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Any additional plates from the Calvin Collection are listed below.
These will be added to the database in due course, but if you are interested in seeing them in advance, please contact Tiffany Adrain.



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