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Oolitowy cykl sedymentacyjny wczesnego kimerydu w profilu Wierzbicy koło Radomia

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Gutowski P.

Volumina Jurassica

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2004

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tom Vol. 2, no. 1

37-48

EN

The Lower Kimmeridgian (Hypselocyclum Zone) section, exposed, in the lower part of the abandoned cement works quarry in Wierzbica, NE margin of the Holy Cross Mountains, Central Poland, represents a shallowing upward sedimentary cycle deposited on a carbonate ramp that developed in the SW margin of the East European Platform. Succession of the sedimentary environments has been recognized according to the variety of typical sedimentary structures as follows: open shelf (outer ramp), oolitic barrier, protected bay, hypersalinary lagoon and tidal flat. This sedimentary cycle resulted from relative sea level rise and corresponding encroaching of the sea onto inner carbonate ramp which was followed by stillstand (or slow fall) of the sea level and connected basinward progradation of the oolitic shoals. Rhizoids and aggregations of cycadacean trunks on beach bars found in the uppermost part of the cyclothem indicate emersion of the area studied. Hardground and erosional structures developed in the top of the cyclothem during a later highstand of sea level.

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Ammonites and ammonite stratigraphy of the Bimammatum Zone and lowermost Pianula Zone (Submediterranean Upper Oxfordian) at Bobrowniki and Raciszyn in the Wieluń Upland, central Poland

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Wierzbowski A. , Głowniak E. , Pietras K.

Volumina Jurassica

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2010

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tom Vol. 8, no. 1

49-102

EN

An extensive collection of ammonites made bed by bed from sections in the Submediterranean Upper Oxfordian of the Wieluń Upland, Central Poland, is described and used as a basis for a chronostratigraphical interpretation of the deposits. The ammonites are mostly of Submediterranean character and enable the recognition of the Bimammatum Zone, including the Bimammatum and Hauffianum subzones, as well as the lowermost Planula Zone distinguished here as a new biostratigraphical horizon – the matyjai horizon – based on the occurrence of Subnebrodites matyjai Wierzbowski et Głowniak sp. nov. The Submediterranean ammonites are mostly oppeliids with Taramelliceras (Taramelliceras) [M] – Glochiceras (Lingulaticeras) [m] the most numerous, as well as Taramelliceras (Richeiceras) and Taramelliceras (Metahaploceras) [M] – Glochiceras (Coryceras) [m]. The profusion of ammonites of these two groups in the stratigraphical interval studied provides new information on their evolution, and two new oppeliid species, Taramelliceras (Taramelliceras) zelcense Wierzbowski et Głowniak sp. nov. and Glochiceras (Lingulaticeras) bobrownikiense Wierzbowski et Głowniak sp. nov., are described here. Subboreal and Boreal ammonites are not common in these sections, but are nevertheless important for correlation. Subboreal ammonites of the family Aulacostephanidae are represented by the genus Vineta [M], including its newly recognized microconchiate counterpart, Vineta [m], and a newly established genus Vielunia [M] Wierzbowski et Głowniak gen. nov., with type species Vielunia dzalosinensis Wierzbowski et Głowniak sp. nov. The latter genus includes ammonites previously referred in the area of study to Ringsteadia, and with a microconchiate counterpart assigned to Prorasenia [m]. The Boreal ammonites comprise late cardioceratids assigned to Amoeboceras (Plasmatites). These ammonites indicate that the deposits in question from the Submediterranean Bimammatum Zone up to the Planula Zone correlate with the Subboreal and Boreal lowermost Kimmeridgian (Baylei Zone, and Bauhini Zone, respectively).

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Ophiuroids from the Upper Jurassic of Kuyavia and the Kraków-Częstochowa Upland, Poland

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Loba M. , Radwańska U.

Acta Geologica Polonica

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2022

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tom Vol. 72, no. 4

391--412

EN

Ophiuroids from the Upper Jurassic marine deposits (upper Oxfordian-lower Kimmeridgian) of southern and north-western Poland have been studied in two sections: Zalas quarry in the Kraków-Częstochowa Upland in southern Poland and Wapienno/Bielawy quarries in the Kuyavia region of north-western Poland. Described herein are nine taxa belonging to five genera (one new to science): Alternacantha Thuy and Meyer, 2013; Dermocoma Hess, 1964; Ophiobartia Loba gen. nov.; Ophioderma Müller and Troschel, 1840; Ophiotreta Verrill, 1899, and three families: Ophiacanthidae and Ophiodermatidae (both of Ljungman, 1867), and Ophiotomidae Paterson, 1985. Only a few representatives of some of these taxa have previously been reported from the Jurassic of Poland. One species, Ophiobartia radwanskii Loba, is established as new. The ophiuroid material recognized from both Polish localities is close to those described from Western Europe at family or even genus level. Both studied ophiuroid assemblages from Zalas and Wapienno/Bielawy show similarities, being dominated by the cosmopolitan species Ophioderma spectabile Hess, 1966, and by different species of Dermocoma. The recognized ophiuroid assemblages represent a rather shallow-water environment.

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New Lower Kimmeridgian ataxioceratin ammonite from the eastern Iberian Chain, Spain: Systematic, biogeographic, and biostratigraphic relevance

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Moliner L. , Oloriz F.

Acta Palaeontologica Polonica

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2010

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tom 55

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nr 1

EN

New ammonites collected bed−by−bed from the upper part of Ataxioceras hypselocyclum Chronozone deposits in the eastern Iberian Chain are described as Geyericeras gen. nov. The new genus includes microand macroconchiate Ataxioceratinae of small size, with moderate to loose coiling and subpolyplocoid ribs, a character crucial for its identification. Key points for the comparative identification of Geyericeras gen. nov. are: (i) microconchiate Geyericerasshow morphological convergence with evolute specimens of the stratigraphically older genus Schneidia [m]; (ii) contemporary Ataxioceratinae genera such as Ardescia [m, M] and Lithacosphinctes [m, M] did not develop subpolyplocoid ribbing; (iii) smoothing of sculpture combined with short primary ribs are not realized in Geyericeras gen. nov. [M] and can be therefore used to separate the new genus from Ataxioceras[M]; and (iv) smaller shells, and weaker and less dense ribbing with no parabolic structures differentiate Geyericeras gen. nov. [m, M] from Parataxioceras[m, M], as well as the type of subpolyplocoid ribs seen among microconchiate specimens of these two genera. The new species Geyericeras aragoniense sp. nov. is the index and guide fossil for identification of a biohorizon occurring below the first occurrence of the genus Crussoliceras in the eastern Iberian Chain.

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Latest Oxfordian – earliest Kimmeridgian ammonite dominated fauna and microfacies from the ammonitico rosso-type Fonyászó Limestone Formation at Zengővárkony (Mecsek Mountains, Hungary)

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Bujtor L. , Albrecht R.

Volumina Jurassica

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2021

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tom Vol. 19, no. 1

61--94

EN

Field work has resulted in the recognition of a previously unknown outcrop in the vicinity of the Zengővárkony lime-kilns (Mecsek Mountains, South Hungary) which has provided a remarkably rich, but poorly preserved, uppermost Oxfordian – earliest Kimmeridgian fauna dominated by ammonites probably representing the Hypselum–Bimammatum zones. This is the first description and illustration of Oxfordian–Kimmeridgian ammonites from the Mecsek Mountains. The cephalopod fauna comprises Phylloceras div. sp., Holcophylloceras div. sp., Sowerbyceras sp., Lytoceras sp., Lissoceratoides erato, Trimarginites cf. trimarginatus, Glochiceras (Coryceras) cf. microdomum, Subdiscosphinctes sp., ?Wegelea sp., Passendorferiinae gen. et sp. ind., ?Orthosphinctes sp., Euaspidoceras cf. radisense, Aspidoceras sp., A. cf. binodum, Physodoceras sp. ex gr. altenense-wolfi, Lamellaptychus sp., Laevaptychus sp. ex gr. hoplisus-obliquus. The fauna has a Mediterranean character (55% of Phylloceratidae and Lytoceratidae) and is similar to the Tethyan assemblages of the Venetian Alps (Italy), and Palma de Mallorca. The spirochaete tube worm Spiraserpula spirolinites is also the first record from the Mecsek Mountains. The Saccocoma wackestone-packstone microfacies is recorded with benthic foraminifera (Lenticulina sp. and Spirillina sp.) indicating well oxygenated and nutrient-rich bottom conditions.

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Asteroidea from the lower Kimmeridgian of Wapienno/Bielawy, Kuyavia region, north-central Poland

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Loba M. , Radwańska U.

Acta Geologica Polonica

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2022

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tom Vol. 72, no. 1

89--106

EN

A relatively rich assemblage of starfish is recognised from the talus facies of an Upper Jurassic (lower Kimmeridgian) biohermal, sponge-cyanobacterial build-up from the Wapienno/Bielawy succession exposed in a salt-dome anticline in Kuyavia region, north-central Poland. The paper presents 8 taxa belonging to 4 genera (one new to science): Boxaster gen. nov., Noviaster Valette, 1929, Tylasteria Valette, 1929, Valettaster Lambert, 1914, and 4 families: Astropectinidae Gray, 1840, Goniasteridae Forbes, 1841, Sphaerasteridae Schöndorf, 1906 and Stauranderasteridae Spencer, 1913. Only a very few representatives of some of these taxa have formerly been reported from the Jurassic of Poland. Two species are new: Valettaster planus sp. nov. and Boxaster wapienensis gen. et sp. nov. The Jurassic starfish assemblage recognised from the Wapienno/Bielawy succession is interpreted as an offshore starfish fauna with the admixture of allochtonous shallow-water taxa. The lithology of the source deposits indicates their transport by storm agitation and/or mass movements. This fact strongly influenced the preservation state, all collected plates being disarticulated and most of them abraded.

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Profil wiercenia Kcynia IG IV i jego znaczenie dla stratygrafii i paleogeografii oksfordu i dolnego kimerydu

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Matyja B. A. , Wierzbowski A.

Biuletyn Państwowego Instytutu Geologicznego

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1998

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tom nr 382

35-74

PL

Opracowanie paleontologiczne kolekcji amonitów oksfordu i dolnego kimerydu z wiercenia Kcynia IG IV z północnej Polski pozwoliło na zrewidowanie biostratygrafii występujących tu utworów i wydzielenie w całym profilu submedyterańskich poziomów i podpoziomów amonitowych. Oprócz obecnych w całym profilu amonitów submedyterańskich, ilościowe zestawienie przedstawicieli prowincji borealnej i subborealnej pozwoliło wykazać, że najsilniejsze wpływy tych prowincji rejestrują się w dolnej części poziomu Bimammatum i najwyższej części poziomu Hypselocyclum. Występowanie amonitów charakterystycznych dla różnych prowincji biogeograficznych w tych samych przedziałach profilu pozwoliło na wyróżnienie nowych powiązań korelacyjnych pomiędzy różnymi podziałami biostratygraficznymi: (1) dolna granica subborealnego poziomu Baylei, równoważna w podziale subborealnym dolnej granicy kimerydu, przebiega w obrębie wyższej części submedyterańskiego poziomu Bimammatum, (2) dolna granica subborealnego poziomu Mutabilis (sensu Birkelund i in., 1983) przebiega w obrębie najwyższej części submedyterańskiego poziomu Hypselocyclum. Analiza paleoekologiczna rozprzestrzenienia poszczególnych rodzin amonitów submedyterańskich w Polsce wskazuje, że w najwcześniejszym kimerydzie istniało bezpośrednie połączenie umożliwiające swobodne przemieszczanie amonitów pomiędzy północną Polska, a obszarami Jury Frankońskiej i Jury Szwabskiej poprzez obszary obecnie pozbawione osadów górnojurajskich.

EN

Palaeontological study of the ammonite collection of the Oxfordian and Lower Kimmeridgian in the Kcynia IG IV borehole in northern Poland has resulted in biostratigraphical revision of the succession and allowed the recognition of the Submediterranean Zones and Subzones. Although Submediterranean ammonites overdominate in the succession, Subboreal and Boreal ammonites increase proportionally in the lower Bimammatum Zone and the uppermost Hypselocyclum Zone reflecting significant ammonite invasions from the north. The co-occurrence of the ammonites indicative of different bioprovinces in the same intervals of the studied succession permits closer correlation of the zonal schemes. The new results of the correlation are as follows: (1) the lower boundary of the Baylei Zone of the Subboreal zonal scheme corresponding therein to the lower boundary of the Kimmeridgian lies within the upper part of the Submediterranean Bimammatum Zone, (2) the lower boundary of the Subboreal Mutabilis Zone (sensu Birkelund et al., 1983) lies within the uppermost part of the Submediterranean Hypselocyclum Zone. Palaeoecological analysis of the distribution of ammonites representing the particular Submediterranean families in Poland has shown that during the earliest Kimmeridgian there existed a direct marine connection between northern Poland and the Franconian and Swabian Albs enabling free migration of ammonites through the areas presently devoid of Upper Jurassic deposits.

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Upper Jurassic and Lower Cretaceous sclerites from the Lodz trough of the South-Eastern Slope of the Kujawy Swell

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Sztejn J.

Bulletin of the Polish Academy of Sciences. Earth Sciences

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1993

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tom 41

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nr 2

9

The Lower Kimmeridgian of the Wieluń Upland and adjoining regions in central Poland: lithostratigraphy, ammonite stratigraphy (upper Planula/Platynota to Divisum zones), palaeogeography and climate-controlled cycles

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Wierzbowski A.

Volumina Jurassica

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2017

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tom Vol. 15, no 1

41--120

EN

The Early Kimmeridgian of the Wieluń Upland and adjoining regions, after the decline of sedimentation of the deep-neritic sponge megafacies (Częstochowa Sponge Limestone Fm.) and associated limestones and marls with poor benthic fauna (Pilica Fm.) during the Planula Chron, showed the subsequent development of moderately shallow-water biostromal chalky limestones with siliceous sponges and corals, replaced laterally by micritic limestones and marls (Prusicko Fm.) during the Platynota Chron and the earliest Hypse¬locyclum Chron. Towards the north and south shallow-marine carbonate platforms occurred (represented by deposits of the “oolitic” fm.), whereas towards the north-west and west deeper marine facies, represented initially by limestones with siliceous sponges (Częstochowa Sponge Limestone Fm.), and later during the Hypselocyclum Chron by bedded limestones and marls with ammonites (Burzenin Fm.) were deposited. This palaeogeographic pattern was controlled by the synsedimentary tectonics. The detailed biostratigraphical classification of the deposits studied from the Platynota to the Divisum zones, and their lithological character, enable the recognition of the primary sedimentary cyclicity by comparison with the well dated short eccentricity cycles in the coeval succession of south-eastern France. The two appendixes enclosed give the characteristics of: (1) the characteristics of the ammonite faunas especially of the families Ataxiocerati¬dae and Aulacostephanidae (where two new species are established – Balticeras samsonowiczi sp. nov., and Rasenioides glazeki sp. nov.); (2) the newly established lithostratigraphical units: the Prusicko Fm., and the Burzenin Fm., and the smaller rank units (members, beds) recognized therein.