Small, bulbous track to ward the back surface of the tile from the scope. Could not image or see well enough to measure; visible bulb portion at 20x measures ~160 µm in length from the angular view. Rotated tile and still get the ~160 overall length for the bulbous portion of this track. No stylus visible. EH is ~15 µm while the MTW is ~64 µm.
| Notes By: | JSC\thsee | Date: |