Strictoporellina cribrosa uncommon Decorah Formation. Least common of the porous frondose types. Pretty solid flat with pores ridden it. No other variability in shapes.
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