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1
Content available Campanian–Maastrichtian foraminiferal stratigraphy and palaeoenvironment of the Lower Tar Member in the Wadi Tar section, Western Sirte Basin (Libya)
Tshakreen S. O., Gasiński M. A., Machaniec E., Mącznik A.
Annales Societatis Geologorum Poloniae
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2017
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Vol. 87, No. 4
349--362
EN
Upper Campanian–Maastrichtian sections on the western flank of the Hun Graben in the Western Sirte Basin (WSB) are displaying two major type facies based on the foraminiferal assemblages. The first one indicates open-marine to outer-shelf conditions, and is represented by numerous bathy-pelagic planktonic foraminiferal species referable to the Radotruncana calcarata, Globotruncana aegyptiaca and the lower part of the Gansserina gansseri Zone (all late Campanian).The second type facies indicates an inner-shelf environment and is represented in the middle-upper part of the Gansserina gansseri Zone (early Maastrichtian) and Racemiguembelina fructicosa (late Maastrichtian) dominated by epi-pelagic planktonic and large benthic foraminifers. Large benthic foraminiferal index species Siderolites calcitrapoides Lamarck and Omphalocyclus macroporus (Lamarck) occur in abundance by the middle–late Maastrichtian. Correlation between planktonic foraminiferal zonation and large benthic foraminiferal zonation is given. An open-marine to outer-shelf environment passed into shallower marine conditions during the late Campanian–early Maastrichtian to late Maastrichtian, then a slight deepening and again shallowing is noticed.
2
Content available Eocene flora and trace fossils from the Hruby Regiel section in the Tatra Mountains (Poland): Taxonomic revision of the Wiktor Kuźniar fossil plant collection
Worobiec G., Jach R., Machaniec E., Uchman A., Worobiec E.
Acta Geologica Polonica
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2015
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Vol. 65, no. 2
203--226
EN
Latest Eocene plant macrofossils and trace fossils collected a century ago by Wiktor Kuźniar are revised and their stratigraphical and palaeoecological meaning is re-considered. They derive from marine limestones and marls cropping out on the northern slope of the Hruby Regiel mountain in the Western Tatra Mountains. Leaves belonging to the families Fagaceae and Lauraceae and fruits of the palm Nypa are recognized. The co-occurrence of the planktonic foraminifer taxa Chiloguembelina cf. gracillima and Globigerinatheca cf. index and fruits of Nypa suggests a latest Eocene age of the fossil flora. The plant assemblage is typical of paratropical or subtropical evergreen forests in a warm and humid subtropical climate, recent counterparts of which occur in southeast Asia. The presence of Nypa is characteristic of mangroves. The good state of preservation of the leaves suggests coastline proximity during sedimentation of the plant-bearing deposits.
3
Content available Morphotype variation of orthophragminids as a palaeoecological indicator: A case study of Bartonian limestones, Pod Capkami Quarry, Tatra Mts, Poland
Machaniec E., Jach R., Gradziński M.
Annales Societatis Geologorum Poloniae
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2011
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Vol. 81, No 2
199-205
EN
Nummulites-Discocyclina bioclastic packstone and Discocyclina rudstone occur in the transgressive sequence of the Middle–Upper Eocene deposits in the Tatra Mts. The succession of the studied facies is a direct response to a rapid environmental change, related to progressive deepening. Facies transition from Nummulites- Discocyclina bioclastic packstone of proximal mid-ramp to Discocylina rudstone of distal mid- and outer-ramp is an exemplary record of a deposition during deepening conditions. Increasing of diversity of the genus Discocyclina, decreasing of diversity of other foraminifera up the section and vertical variation of orthophragminid mor- photypes from the ovate- through saddle- to the disc-shaped tests are related to deepening and shadowing of the depositional environment.
4
Content available Injection dykes as evidence of Campanian synsedimentary tectonics on the Kraków Swell, southern Poland
Kołodziej B., Szulc J., Machaniec E., Kędzierski M., Duda M.
Annales Societatis Geologorum Poloniae
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2010
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Vol. 80, No 3
285-301
EN
The topmost part of the Oxfordian limestones, building the Zakrzówek Horst in Kraków, is featured by a network of minute fissures, filled with Upper Cretaceous limestones. Fissures are dominantly subhorizontal, anastomosing and polygonal in plane. They are filled with white limestones representing mostly foraminiferal- calcisphere wackestones, with subordinate amount of quartz pebbles and fragments of stromatolite coming from the latest Turonian-?Early Coniacian conglomerate overlying Oxfordian basement. The fissures are seismically- induced injection dykes. In contrast to gravitationally-filled neptunian dykes the recognised injection dykes were filled by overpressured soft sediments. Foraminifera within some dykes are abundant, and dominated by planktonic forms, which indicate the Early/Late Campanian age (Globotruncana ventricosa and Globotruncanita calcarata zones) of the filling, and hence date also the synsedimentary tectonics. Abundant and diversified keeled globo- truncanids in the Campanian of the Kraków region are recognised for the first time. Other important findings at the studied section include karstic cavities featuring the surface of the Oxfordian bedrock filled with conglomerates of the latest Turonian-?Early Coniacian age based on foraminifera and nannoplankton, and lack of Santonian deposits, which elsewhere are common in the Upper Cretaceous sequences in the Kraków region. The discovered Campanian dykes provide new evidence for the Late Cretaceous tectonic activity on the Kraków Swell related to the Subhercynian tectonism, which resulted among others in stratigraphic hiatuses and unconformities characte- ristic of the Turonian-Santonian interval of this area.
5
Content available Biostratygrafia mikropaleontologiczna utworów kredy górnej i miocenu w wierceniu "Bibice" (okolice Krakowa)
Zapałowicz-Bilan B., Pilarz M., Machaniec E.
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
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2009
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T. 35, z. 2/1
95-103
EN
Lower Campanian marls and marly opokas with cherts ("Bibice" borehole, Kraków vicinity) are rich in benthic forams (mainly Stensioeina and Gavelinella species) and rare planktic ones (Hedbergella). The overlying Miocene deposits (Kłodnik and Skawina beds), are developed as conglomerates (equivalent of fresh-water marls in Krakow region) which are completely devoid of microfossils, but younger clays are full of the Badenian forams.
6
Content available remote Micropalaeontological analysis of olistoliths from the Wieliczka Salt Mine (Outer Carpathians, Poland)
Machaniec E., Zapałowicz-Bilan B.
Studia Geologica Polonica
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2005
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Vol. 124
273-284
EN
Upper Cretaceous variegated marls of a Węglówka-type facies are exposed in the form of olistoliths within the Zuber-type salt deposits at the higher exploitation level of the "Kunegunda" Drift in the Wieliczka Salt Mine. This is the southernmost zone of occurrence of redeposited blocks of the Carpathian flysch sediments within the Miocene salt deposits of the Carpathian Foredeep. The variegated marls contain considerably diversified assemblages consisting only of small benthic foraminifera, including both agglutinated and calcareous taxa. Basing on the ranges of the characteristic species the variegated marls in the "Kunegunda" drift are dated as Turonian-Campanian. Two zones of benthonic agglutinated foraminifera have been recognised: the Uvigerinammina jankoi and Goesella rugosa zones. The foraminiferal assemblage of the youngest segment of the Węglówka marls is dominated by calcareous benthonic taxa with Stensioeina gracilis Brotzen as the most numerous species. Its presence indicates a Campanian age of this part of the studied deposits.
7
Content available remote Foraminiferal biostratigraphy and palaeobathymetry of Senonian marls (Upper Cretaceous) in the vicinity of Kraków (Januszowice-Korzkiew area, Bonarka quarry) - preliminary study
Machaniec E., Zapałowicz-Bilan B.
Studia Geologica Polonica
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2005
|
Vol. 124
285-296
EN
In the vicinity of Kraków, Upper Cretaceous sediments rest upon the Upper Jurassic (Oxfordian) massive limestones and are developed as sands, conglomerates and marls. Foraminiferal assemblages from Upper Cretaceous sediments are dominated by calcareous benthic forms whereas planktonic foraminifers are rare and represented by Hedbergella and Whiteinella (sporadically also Marginotruncana and Globotruncana). Taxa identified in foraminiferal assemblages enable to distinguish several zones: Lower Santonian Gavelinella thalmanni partial range zone, the Bolivinoi- des strigillatus partial range zone (Upper Santonian and lowermost Turonian) and the Lower Campanian Bolivinoides decoratus partial range zone. Analysis of foraminiferal assemblages allows us to draw preliminary conclusions concerning the palaeobathymetry of the Late Cretaceous basin in the study area. Palaeobathymetric evaluations give a maximum basin depth of about 200 meters.
8
Content available remote A Middle Cenomanian foraminiferal assemblage from the Nowe Rybie section (Żegocina Tectonic Window, Subsilesian Unit, Polish Outer Carpathians)
Machaniec E., Gasiński M. A., Ślączka A., Leśniak T.
Studia Geologica Polonica
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2005
|
Vol. 124
249-258
EN
The Żegocina Tectonic Window is the most eastward located tectonic window of the Lanckorona-Żegocina Zone in the Polish Outer Carpathians and represents the slope parts of the Silesian basin and intrabasinal uplifted zones of the Subsilesian Unit. Upper Cretaceous and Palaeocene variegated marls, typical deposits of the studied part of the basin, are intercalated with the so-called Rybie beds (local sediments of siliciclastic submarine fans). A Middle Cenomanian foraminiferal assemblage (Rotalipora reicheli Zone) is here described from these sediments. The assemblage contains numerous planktonic (epipelagic and bathypelagic) foraminiferids, which is rather unique within the "Flysch" type assemblages. A middle slope palaeodepth is suggested as the depositional environment, based on benthic and planktonic foraminiferal associations.
9
Biostratigraphy and Palaeoecology of the Late Cretaceous Foraminiferids at Krzyworzeka Stream Section (Subsilesian Unit, Polish Outer Carpathians)
Machaniec E., Gasiński M., Leśniak T.
Bulletin of the Polish Academy of Sciences. Earth Sciences
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2001
|
Vol. 49, nr 2
99-107
EN
Assemblages of foraminiferids from the Upper Cretaceous section of the Subsilesian unit (Polish Outer Carpathians) have been analyzed. The age of the studied samples bas been estimated as Turonian-Campanian, based on agglutinated as well as planktonic foraminiferids. Morphogroup analysis of the studied foraminiferids showed an increase of the organic flux on the basin floor.
10
Content available remote Biostratigraphy and palaeoecology of the Upper Cretaceous Węglówka marls on the basis of small foraminifera (Outer Carpathians, Poland)
Machaniec E., Leśniak T.
Biuletyn Państwowego Instytutu Geologicznego
|
2001
|
nr 396
99-100
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