Endoceras proteiforme
A large Endoceras proteiforme. From Decorah shale. Only a little section of the shell remains on the lower half. The segmented part are septum and the smooth part are siphuncle.
Photo Information
- Taken with EASTMAN KODAK COMPANY KODAK DX7590 ZOOM DIGITAL CAMERA
- Focal Length 6.3 mm
- Exposure Time 1/8
- f Aperture f/2.8
- ISO Speed 140