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Ewolucja zespołów trylobitowych z drugiego i trzeciego oddziału kambru Gór Świętokrzyskich i ich znaczenie biogeograficzne

Żylińska A.

Przegląd Geologiczny

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2013

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Vol. 61, nr 1

30–-39

EN

Deposits of the Cambrian Series 2 and 3 of the Holy Cross Mountains, comprising sandstones, and silty and clayey mudstones, are located on the Małopolska Block which is part of the Trans-European Suture Zone. Most recent geophysical data point to the proximal nature of this structural element with regard to the Baltica palaeocontinent. The trilobite assemblages are dominated by Ellipsocephalidae, generally accompanied by Holmiidae in the lower part, and by Paradoxididae in the upper part of the studied interval. They display a significant evolutionary trend, correlatable with the development of contemporary assemblages in Avalonia and Gondwana rather than those of Baltica. Discrepancies between the basement affinity and the dominant trilobites may be explained by the influence of strong larva-carrying currents from Avalonia and Gondwana.

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Trilobites, their traces and associated sedimentary structures as indicators of the Cambrian palaeoenvironment of the Ociesęki Range (Holy Cross Mountains, Poland)

Stachacz M.

Geological Quarterly

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2013

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Vol. 57, No. 4

745–-756

EN

Enrolled specimens of trilobite species Strenuella polonica, partly preserved within their escape structures and burrows from the Cambrian Series 2 Ociesęki Sandstone Formation, are described. The specimens are interpreted as buried during storm episodes. Their occurrence in a few horizons, the presence of non-bioturbated tempestites with combined wave-current ripples and groovemarks interbedded with bioturbated beds suggest a depositional environment between normal and storm wave base. The trace fossils Monomorphichnus and some Rusophycus have been interpreted as structures formed during the storm when animal tried to take refuge. Well-preserved syndepositional Rusophycus and its different taphonomic variants are discussed. The part of the Ociesęki Sandstone Formation studied is interpreted as deposited on a lower shoreface with storm influence.

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The oldest Cambrian trilobites from the Holy Cross Mountains, Poland : taxonomic, stratigraphic and biogeographic reappraisal

Żylińska A.

Acta Geologica Polonica

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2013

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Vol. 63, no. 1

57-87

EN

Authorship issues are clarified, new photographic documentation is provided and emended systematic descriptions are presented for the oldest Cambrian trilobite taxa from the Holy Cross Mountains (Poland). Biostratigraphic analysis of the fauna allows correlation with the traditional Holmia kjerulfi-group Zone of Scandinavia, the Callavia Zone of Britain and Newfoundland, the lower and middle part of the Sectigena Zone of Morocco and the Marianian Stage of Spain. The trilobites display a strong biogeographic signal linked with West Gondwana and Avalonia and a suggestion is made that the TESZ margin of Baltica with the Malopolska Massif was liable to currents from those areas that distributed planktonic trilobite larvae.

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Ichnology of Czarna Shale Formation (Cambrian, Holy Cross Mountains, Poland)

Stachacz M.

Annales Societatis Geologorum Poloniae

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2012

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Vol. 82, No. 2

105–-120

EN

Ten ichnogenera and seven ichnospecies are described from the Czarna Shale Formation, possibly representing the Terreneuvian and Cambrian Series 2 of the Holy Cross Mountains. Moreover, five other ichnotaxa are described in open nomenclature. Phycodes circinatus,Taenidium isp., Trichichnus linearis and ?Dictyodora isp. are described from the Cambrian of the Holy Cross Mountains for the first time. The stratigraphic ranges of Trichichnus linearis and Phycodes circinatus are extended. The trace fossil assemblage and associated, sedimentological features point to deposition in the upper and lower offshore. Periodic, anoxic events may have occurred on the sea bed.