Calvin`s Scrapbook

Images of Rocks and Sedimentary Structures


Cladopora iowensis

Photograph details:
Location: U.S.; Iowa; Johnson Co.; Iowa City, north of, Butler's Landing.

Geologic Age: Devonian.
Photograph No. 7291


- Larger Image -
Cladopora iowensis

Photograph details:
Location: U.S.; Iowa; Johnson Co.; Iowa City, north of, Butler's Landing.

Geologic Age: Devonian.
Photograph No. 7293


- Larger Image -
Group of Geodes from the Upper Keokuk

Photograph details:
Location: U.S.; Iowa; Lee Co.; Keokuk.

Geologic Age: Mississippian.
Photographed by: Van Tuyl. Lantern Slide No. 1464.
Photograph No. 539


- Larger Image -
Illinoian boulders

Photograph details:
Location: U.S.; Iowa.

Geologic Age: Pleistocene.
Photograph No. 628


- Larger Image -
The Five Sisters Boulders

Photograph details:
Location: U.S.; Iowa; Buchanan Co.; Winthrop, near.

Geologic Age: Pleistocene.
Photograph No. 858


- Larger Image -
The Sentinel, Section 19, Boulders

Photograph details:
Location: U.S.; Iowa; Buchanan Co.; Newton Twp..

Geologic Age: Pleistocene.
Photograph No. 859


- Larger Image -
Glacial scorings near Kingston (No. 2)

Photograph details:
Location: U.S.; Iowa; Des Moines Co.; Burlington, near.

Geologic Age: Pleistocene.
Photographed by: Fultz.
Photograph No. 614


- Larger Image -
Glacial Scorings

Photograph details:
Location: U.S.; Iowa; Des Moines Co.; Kingston.

Geologic Age: Pleistocene.
Photograph No. 2001


- Larger Image -
Boulder Pile, close up view

Photograph details:
Location: U.S.; Iowa; Howard Co.; Forest City Twp., lane between sections 13 and 32.

Geologic Age: Pleistocene.
Photographed by: Earl T. Apfel, July 4, 1925.
Photograph No. 7197


- Larger Image -
Wind-polished boulder

Photograph details:
Location: U.S.; Iowa; Cedar Co.; Stanwood, west of.

Geologic Age: Pleistocene.
Photographed by: Earl T. Apfel, July 2, 1925. Lantern Slide No. 6153.
Photograph No. 7187


- Larger Image -
Granite boulder, 24x21x10 feet, south half of S.E. quarter

Photograph details:
Location: U.S.; Iowa; Des Moines Co.; Union Twp., Section 23.


Photographed by: E.T. Apfel, June 20, 1924. Lantern Slide No. 4483.
Photograph No. 892


- Larger Image -
View of rocks in front of Old Science Hall

Photograph details:
Location: U.S.; Iowa; Johnson Co.; Iowa City, S.U.I., Old Science Hall.


Photograph No. 7369


- Larger Image -
Petrology, Lencite porphyry

Photograph details:
Location: U.S.; Arkansas; Margaret Cave.


Photograph No. 2415


- Larger Image -


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.


Return to: