Return To Top Page, other Examples of Blades, or Specimen Index
How to View Stereo Images
- Collected: Site P, Liepers Shale from Upper Ordovician in Nashville, Tennessee, USA.
- Estimated Age: about 450 million years old.
- Dimensions: scale bar is .5 mm
- Comments: Lower bar shows oil-immersion detail of laminated structure from base of element, including helical arrangements of cells. Possibly a vascular structure? Contract of photomicrograph was enhanced by taking blank field, converting to negative and subtracting with about 35% transparancy to removing diffraction rings and CCD imperfections.
Page established 2-15-2000, updated 4-1-2000
Go back to: Top Page