| The igneous rock basin in north-west part of Saxony, which
is separated from the Erzgebirge basin by the granulite rock unit, is
blessed with promising sites for chert collection of various origin. The
cherts possibly formed at several places and subsequently have been widely
distributed, apparently in the turmoil related to glaciation and also
along ancient courses of rivers, as Mulde, Elbe, and the Altenburg river
in the Tertiary. So it is not surprising that cherts are found in many
gravel pits in the area.
Remarkable samples of fossiliferous cherts from primary and secondary
deposits in the north-west part of Saxony are presented in the following.
Unfortunately, not many of them compare with the conspicuous samples from
Nova Paka or Doehlen basin known for excellent preservation, perhaps with
the cherts from the Nobitz gravel pit as an exception. Although the preservation
may be different, the fossil content is similar. Therefore one can hope
that the poorly preserved fossils can be identified by comparison with
the better preserved ones from other locations. Also one would like to
locate the sites of primary chert formation and compare the samples found
in-situ with the transported ones.
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