scholarly journals Berthierine in the Middle Jurassic sideritic rocks from southern Poland

2015 ◽  
Author(s):  
Aleksandra KOZŁOWSKA ◽  
Anna MALISZEWSKA
Keyword(s):  
Middle Jurassic ◽  
Southern Poland

scholarly journals Callovian (Middle Jurassic) cyclostome bryozoans from the Zalas Quarry, southern Poland

2013 ◽  
pp. 837-863 ◽  
Author(s):  
M. Zatoń ◽  
U. Hara ◽  
P.D. Taylor ◽  
M. Krobicki
Keyword(s):  
Middle Jurassic ◽  
Southern Poland

scholarly journals Fossil flora of Middle Jurassic Grojec clays (southern Poland). Raciborski’s original material reinvestigated and supplemented. I. Sphenophytes

2015 ◽  
Vol 55 (2) ◽  
pp. 149-181
Author(s):  
Agata Jarzynka ◽  
Grzegorz Pacyna
Keyword(s):  
New Species ◽  
Middle Jurassic ◽  
Fossil Flora ◽  
Vascular Bundles ◽  
Original Material ◽  
Type Specimens ◽  
Southern Poland ◽  
The Poor ◽  
The Common ◽  
First Time

AbstractSphenopsid remains from Grojec clays (Grojec, Poręba, Mirów) collected and described by Raciborski in 1894 are re-examined for the first time and supplemented by Raciborski’s unpublished material housed at the Jagiellonian University (Institute of Botany) and by Stur’s preliminarily described material stored at the Geological Survey of Austria. Three species of Equisetum created by Raciborski (Equisetum renaulti, E. remotum, E. blandum) are now attributed to the common Jurassic species Equisetites lateralis, and the earlierundescribed Equisetites cf. columnaris is recognised. The occurrence of Neocalamites lehmannianus (originally described by Raciborski as Schizoneura hoerensis) has been confirmed from Grojec. The material that Raciborski referred to this species seems to be heterogeneous, and some specimens are now removed to the new proposed species Neocalamites grojecensis Jarzynka et Pacyna sp. nov. The new species is diagnosed by the following features: only a few prominent ribs present on shoot, leaf scars relatively large and ellipsoidal, numerous free leaves, vascular bundles alternate at node. Possibly the new species derives from Neocalamites lehmannianus or at least is closely related to it. Part of the poorly preserved remains can be determined only as Neocalamites sp. Another species created by Raciborski, Phyllotheca (?) leptoderma, is based on poorly preserved type specimens. Some of the unpublished specimens stored at the Jagiellonian University (Institute of Botany) correspond to Raciborski’s description, but considering the poor preservation of the original material and the not very realistic published illustrations of this species, they rather should be regarded as indeterminate cortical fragments of Neocalamites lehmannianus and/or badly preserved external cortical surfaces of the new species Neocalamites grojecensis. Phyllotheca (?) leptoderma should be considered a nomen dubium.

scholarly journals A reassessment of ‘<i>Globigerina bathoniana</i>’ Pazdrowa, 1969 and the palaeoceanographic significance of Jurassic planktic foraminifera from southern Poland

2012 ◽  
Vol 31 (2) ◽  
pp. 97-109 ◽  
Author(s):  
Malcolm B. Hart ◽  
Wendy Hudson ◽  
Christopher W. Smart ◽  
Jarosław Tyszka
Keyword(s):  
Water Column ◽  
Central Europe ◽  
Middle Jurassic ◽  
The Other ◽  
Carbonate Sediments ◽  
Calcareous Nannofossils ◽  
Planktic Foraminifera ◽  
Geological Record ◽  
Sea Floor ◽  
Southern Poland

Abstract. ‘Globigerina Ooze’, Foraminiferal Ooze or Carbonate Ooze as it is now known, is a widespread and highly characteristic sediment of the modern ocean system. Comparable sediments are much less common in the geological record although, as we describe here, a number of Middle Jurassic carbonate sediments with distinctive assemblages from Central Europe fulfil many of the criteria. One important component of these assemblages in the Middle Jurassic is ‘Globigerina bathoniana’ Pazdrowa, 1969, first described from the Bathonian sediments near Ogrodzieniec (Poland). The generic assignment of this species and other coeval Jurassic taxa is discussed. This species and many of the other early planktic foraminifera evolved in the Aragonite ll Ocean, together with the other two oceanic carbonate producers: the calcareous nannofossils and the calcareous dinoflagellates. The preservation of carbonate sediments with abundant planktic foraminifera on the sea floor indicates that, by the mid-Jurassic, the carbonate/aragonite compensation depths (and associated lysoclines) must have developed in the water column.

An introduction to the palaeoenvironmental reconstruction of the Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland

2012 ◽  
Vol 62 (3) ◽  
pp. 267-280 ◽  
Author(s):  
Przemysław Gedl ◽  
Andandrzej Kaim
Keyword(s):  
Middle Jurassic ◽  
Southern Poland ◽  
Palaeoenvironmental Reconstruction ◽  
Palaeoenvironmental Reconstructions ◽  
Multidisciplinary Studies ◽  
Geochemical Studies

ABSTRACT Gedl. P. and Kaim, A. 2012. An introduction to the palaeoenvironmental reconstruction of the Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland. Acta Geologica Polonica, 62 (3), 267- 280. Warszawa. This paper provides introductory data for multidisciplinary studies on palaeoenvironmental reconstructions of the Bathonian (Middle Jurassic) ore-bearing clays exposed at Gnaszyn, southern Poland. These dark-coloured fine-clastic deposits have been studied for micropalaeontology, sedimentology and geochemistry (published in separate papers within this volume). Brief outlines of the Middle Jurassic palaeogeography of the Polish epicontinental basin and the geology of the Kraków-Silesia Homocline are given. A description of the ore-bearing clays succession exposed in the clay-pit at Gnaszyn is provided, including locations of the sections studied, their ammonite biostratigraphy, brief lithology and macrofossil distribution. The sample positions collected for micropalaeontological and geochemical studies are specified.

scholarly journals Fossil flora of Middle Jurassic Grojec clays (southern Poland). Raciborski’s original material reinvestigated and supplemented. II. Pteridophyta. Osmundales

2016 ◽  
Vol 56 (2) ◽  
pp. 183-221 ◽  
Author(s):  
Agata Jarzynka
Keyword(s):  
Middle Jurassic ◽  
Geological Survey ◽  
Fossil Flora ◽  
Original Material ◽  
Southern Poland

Abstract In the second part of the series dealing with the flora of the Grojec clays (Poland, Middle Jurassic), macroremains of Osmundales are introduced. The re-examined and supplemented material originates from three collections: specimens collected and described in Polish by Raciborski in 1894; specimens preliminarily described by Stur (1888), housed at the Geological Survey of Austria; and Raciborski’s still-unpublished material stored at the Institute of Botany of the Jagiellonian University. So far, 15 taxa of Cladophlebis have been described from the Osmundales of Grojec clays, and two species of Todites (Todea) and Osmundopsis (Osmunda) sturii. Detailed observations indicate that a large part of the material (12 taxa described by Raciborski) should be assigned to three widespread Jurassic species: Cladophlebis denticulata, C. haiburnensis, and C. roessertii. Cladophlebis aurita and C. bartonecii, created by Raciborski, should be retained. The occurrence of sterile and fertile fronds of Todites williamsonii (originally described as Todea williamsonis, Cladophlebis whitbiensis, and Cladophlebis solida) is confirmed for Grojec. Two species described by Raciborski (1894) required a change of generic names - Osmundopsis (Osmunda) sturii and Todites (Todea) princeps. This paper provides the taxonomical descriptions and considers the palaeoecology of 5 Cladophlebis species (C. aurita, C. denticulata, C. haiburnensis, C. roessertii, C. bartonecii) and other osmundaceous ferns such as Osmundopsis sturii, Todites williamsonii, and T. princeps.

scholarly journals Middle Jurassic (Bathonian) encrusted oncoids from the Polish Jura, southern Poland

Facies ◽  
2011 ◽  
Vol 58 (1) ◽  
pp. 57-77 ◽  
Author(s):  
Michał Zatoń ◽  
Barbara Kremer ◽  
Leszek Marynowski ◽  
Mark A. Wilson ◽  
Wojciech Krawczyński
Keyword(s):  
Middle Jurassic ◽  
Southern Poland
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