P447Ho, fossiliferous chert from Schallodenbach, overview
Fig.1: The light-coloured opaque matrix contains black wood
fragments and other well
preserved plant parts (below, right). Colour and degree of silicification vary
near the
surface above. The matrix is heavily fractured, with part of the cracks filled
with
white agate (centre right). coll. R.KRETZSCHMAR/Chemnitz,
scale bar = 1 cm