File:Fossil (or something) in gravel (11790725563).jpg

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We went hiking in the Indiana Dunes National Lakeshore in October, on the Cowles Bog Trail. The access path from the Greenbelt Trailhead has been covered with gravel; I spotted a piece with a vaguely marine-like impression that struck me as a fossil.

Approximately 2.25x life-size magnification, image width represents approx. 16mm.

Notes: Canon FD 50mm f/3.5 S.S.C. Macro Lens (reverse mounted), Canon Macro Hood, Canon MA-55 Macrophoto Adapter, Canon Vari-Extension Tube M30-55, Canon Macro Lens Mount Converter FD-EOS (70mm extension from tube and adapters). Lens aperture ring set to f/11. Flash set to 1/2 power, fired into reflector card above center. Bicycle headlamp used to aid focusing (also adds a slight blue cast to the light).
Date
Source fossil (or something) in gravel
Author John Lodder from Chicago

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by jlodder at https://flickr.com/photos/45040421@N06/11790725563 (archive). It was reviewed on 4 December 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

4 December 2018

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Date/TimeThumbnailDimensionsUserComment
current13:23, 4 December 2018Thumbnail for version as of 13:23, 4 December 20181,200 × 800 (597 KB)Luisbrudna (talk | contribs)Transferred from Flickr via #flickr2commons

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