Ctenodonta hamburgensis Decorah Formation. Rare. This one is unusual in most of shell is perserved, only a chuck missed from right side.
Photo Information
- Taken with EASTMAN KODAK COMPANY KODAK DX7590 ZOOM DIGITAL CAMERA
- Focal Length 8.5 mm
- Exposure Time 1/25
- f Aperture f/3.0
- ISO Speed 140
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