P147Ho, chert from Ruedigsdorf
Chert fracture face, 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
~ 14cm.