By Tetradium
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Vanuxemia obstusifrons Common in Decorah formation, uncommon in Platteville Formation. Vary considerable in sizes.
Photo Information
- Taken with EASTMAN KODAK COMPANY KODAK DX7590 ZOOM DIGITAL CAMERA
- Focal Length 8.5 mm
- Exposure Time 1/40
- f Aperture f/3.0
- ISO Speed 100
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