P147Ho, chert from Ruedigsdorf, detail
Chert fracture face, detail, cortex imprint with Syringodendron
aspect: paired markings of
conducting strands in quincunx array, also lengthwise running narrow strands,
direction
of trunk from below left towards above right, (Let the mouse move over the picture
to help you see.)
coll. KRETZSCHMAR/Chemnitz, width of picture ~ 5cm.