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Sphenopsid and fern remains from the Upper Triassic of Krasiejów (SW Poland)

100%

Pacyna G.

tom Vol. 89, No. 3

307--316

Hydrophilic elements, such as sphenopsids and fems, are rare in the flora of the Krasiejów site and they are poorly preserved. One sphenopsid species, Neocalamites merianii, was recognised. It is preserved as impressions, flattened casts, moulds and isolated leaves. So far, only one small fern specimen, determined as Sphenopteris sp., has been found. These elements probably were transported to the site of deposition and did not grow where they were buried.

The first record of Aspiduriella (Ophiuroidea) in the Upper Muschelkalk of Poland

100%

Salamon M. A. , Boczarowski A.

tom Vol. 47, No 3

307-310

The ophiuroid Aspiduriella sp. is recorded for the first time from the Upper Muschelkalk (Ceratites Beds), at Nietulisko, northern margin of the Holy Cross Mountains, central Poland.

Integrated subsurface characterisation of the Röt succession of the Bolesławiec Syncline (SW Poland): stratigraphic and tectonic constraints of the geological record

75%

Durkowski K. , Mastalerz K. , Fijalkowska-Mader A.

tom Vol. 94, No. 1

83--110

This study presents the first comprehensive geological analysis of the Triassic Röt sedimentary succession in the Bolesławiec Syncline (BS), North-Sudetic Synclinorium (NSS), SW Poland, and fills information gaps regarding the local lithology, stratigraphy, extent and organisation of this succession. During Triassic time, the BS was located on the southern periphery of the epicontinental Germanic (Central European) Basin. The mixed siliciclastic-carbonate Röt succession transgressively overlies the continental siliciclastics of the Buntsandstein (Bunter), locally with the occurrence of a stratigraphic gap. The Röt succession displays a complex vertical organisation with basic, about 1-m-scale, fine siliciclastic-carbonate couplets, and larger-scale sequences. The well-log profiles allow identification and provisional subdivision of the succession into several 1D sequences, 10–25 m thick, which can be correlated across the study area. The collected palynological material indicated the latest Olenekian to early Anisian age of the local Röt succession. A surprisingly strong thickness diversification of the succession, as well as its frequent incompleteness, evidenced by both palynology and correlation of well-log profiles, is interpreted in terms of local erosion, non-deposition, synsedimentary tectonic activity, and later tectonic deformation. The authors conclude that synsedimentary tectonics resulted in faulting of the area and was the principal factor responsible for differential subsidence and variable sediment accumulation rates. The lower stratigraphic interval of the Röt succession is defined explicitly by the presence of numerous and diversified small-scale soft-sediment deformational structures. The coincidental occurrence of the first marine deposits in the BS area, together with the intense soft-sediment deformation appear to indicate that the end of Early Triassic transgression was associated with intensified regional seismic/tectonic activity. The Röt sedimentary succession of the BS area also was affected by younger tectonic deformation. The pre-Cenomanian events brought about at least local uplift and limited erosion of the Röt succession. Late Cretaceous–Palaeogene inversion was responsible for the final development of the present-day structure of the NSS.

Encrinus cf. liliiformis Lamarck, 1801, the youngest crinoid from the Polish Muschelkalk (Middle Triassic)

51%

Salamon M. A.

tom T. 31, z. 2

243-252

The paper reports first undoubted occurrence of crinoid species Encrinus cf. liliiformis from the Upper Muschelkalk (Middle Triassic) of Poland. Contrary to previous records, it has been found the species occurs only in Upper Muschelkalk sediments. On the basis of known evidence, it seems that E. cf. liliiformis migrated east to west through the reactivated East-Carpathian Gate

Po raz pierwszy udokumentowano pewną obecność liliowca Encrinus cf. liliiformis w osadach górnego wapienia muszlowego (środkowy trias) Polski. W przeciwieństwie do poprzednich doniesień wykazano, że gatunek ten występuje jedynie w górnym wapieniu muszlowym. Szereg przesłanek świadczy o migracji E. cf. liliiformis ze wschodu na zachód przez reaktywowaną bramę wschodnio-karpacką