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Geological Magazine; July 2007; v. 144; no. 4; p. 661-686; DOI: 10.1017/S0016756807003366
© 2007 Cambridge University Press (CUP)
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Cambrian trilobites from Brzechów, Holy Cross Mountains (Poland) and their significance in stratigraphic correlation and biogeographic reconstructions

ANNA ZYLINSKA*,* and MONIKA MASIAK{dagger}

* Faculty of Geology, University of Warsaw, Al. Zwirki i Wigury 93, PL-02-089 Warsaw, Poland
{dagger} Institute of Geological Sciences, Polish Academy of Sciences, ul. Twarda 51/55, PL-00-818 Warsaw, Poland

* Author for correspondence: anna.zylinska{at}uw.edu.pl

A revision of the trilobite fauna from Brzechów in the Holy Cross Mountains (Poland) shows that the assemblage consists of Palaeolenus medius (Bednarczyk), Issafeniella orlowinensis (Samsonowicz), Kingaspidoides sanctacrucensis (Czarnocki), Paradoxides (Acadoparadoxides) oelandicus Sjögren, P. (A.) cf. mureroensis Sdzuy and P. (A.) sp. It is earliest Middle Cambrian in age according to the West Gondwana standard of Geyer & Landing (2004) and can be correlated with the Cephalopyge notabilis Zone of Morocco. Moreover, the co-occurrence of the ranges of P. (A.) oelandicus with P. (A.) cf. mureroensis might suggest that P. (A.) oelandicus appears earlier in the Brzechów sandstones than in Scandinavia, thus the strata exposed here do not find their correlative in the Scandinavian succession. As a result, the Banian/Agdzian boundary (Lower–Middle Cambrian boundary according to the West Gondwana standard) probably lies within the Kamieniec Formation, and also below the Brzechów sandstones, in the upper part of the Ocieseki Formation. Close similarity of the discussed assemblage with contemporaneous assemblages from Morocco, Jordan or New Brunswick indicates that the fauna is generally of peri-Gondwanan and Gondwanan aspect.

Key Words: Lower Cambrian • Middle Cambrian • stratigraphy • Holy Cross Mountains • Trilobita • Poland






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