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- Graptolites and Pterobranchs -
WEB PAGES NOT ONLY FOR GRAPTOLITERS
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THE PRIDOLIAN GRAPTOLITES AND THE POSSIBILITIES OF THEIR CORRELATION
Lech TELLER
In: Bjerreskov, M. & Stouge, S. (Eds.) Third International Graptolite Conference Abstracts, 1985, 91.
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The use of graptolites for a detailed subdivision of the youngest stratotype of the Silurian System in the Barrandian
poses difficulties in the correlation with other regions. The proposed zonal subdivision is in fact the same as that
established earlier by Pribyl in 1940. Since that time, however, various graptolites of the same age have been recognized
in several sections all over the world (Kazakhstan, Arctic Canada, Nevada, Australia, Morocco, Bulgaria, Wolhynia and
Poland).
The abundance of new data made the detailed zonal correlation with the Barrandian area much more difficult, because
the graptolite fauna in the latter area is probably not fully documented. It may be a result of absence of some taxons due
to a condensed carbanate sedimenation in which even sedimentary gaps are to be expected. It cannot be excluded,
however, that so far unknown graptolites still exist in the Pridoli Series.
Difficulties arise when a correlation is done with the Polish Pridolian graptolites found in several Silurian sections in
Eastern Poland. The graptolites represent a rich and very differentiated assemblage that can be easily traced vertically
in undisturbed clayey facies. In addition to the graptolites the Pridoli Series shows presence of other faunal groups which
unfortunately are of strong endemic character thus their correlation value is weak.
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GRAPTOLITE NET
is edited and periodically updated by
Dr Piotr Mierzejewski, Count of Calmont
since 2002
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