Sedimentological, geochemical and microfaunal responses to environmental changes around the Cenomanian–Turonian boundary in the Outer Carpathian Basin; a record from the Subsilesian Nappe, Poland

Bąk, Krzysztof

doi:10.1016/j.palaeo.2005.12.008

Cited by 25 publications

(13 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These short-lived radiolarian-rich levels are thought to represent episodes of coastal upwelling in the SubsilesianSilesian basin in Poland (Bąk, 2006). High numbers of radiolarians in the Gubbio "Bonarelli Level" are considered to be indicators of highly eutrophic conditions that resulted in the expansion of the oxygen minimum zone .…”

Section: Discussionmentioning

confidence: 99%

“…The Cenomanian/Turonian Boundary Event is well documented in southern Europe where it is referred to as the "Bonarelli Level" (Arthur and Premoli-Silva, 1982;Luciani and Cobianchi, 1999;Scopelliti et al, 2004;Gräfe, 2005) and in northern and western Europe (Ernst et al, 1984;Hilbrecht et al, 1996;Svobodá et al, 2004;Bąk, 2006). However, relatively few studies deal with the benthic foraminiferal turnover over this interval (Leckie, 1985;Leary and Peryt, 1991;Kuhnt, 1992;Coccioni et al, 1995;Paul et al, 1999;Peryt, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…However, relatively few studies deal with the benthic foraminiferal turnover over this interval (Leckie, 1985;Leary and Peryt, 1991;Kuhnt, 1992;Coccioni et al, 1995;Paul et al, 1999;Peryt, 2004). Many of these studies only provide information on bathymetrically shallow (Leckie, 1985;Hilbrecht et al, 1996;Čhech et al, 2005;Gräfe, 2005) or deep sites below the CCD (Kuhnt, 1992;Švábenická et al, 1997;Bąk, 2006).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Biostratigraphy of the Cenomanian-Turonian boundary in the Eastern Carpathians (Dâmboviţa Valley): preliminary observations

Cetean¹,

Bălc²,

Kaminski³

et al. 2008

Studia UBB, Geologia

View full text Add to dashboard Cite

ABSTRACT. Planktonic and benthic foraminiferal assemblages from an Upper Albian to Lower Turonian interval in the East Carpathians were investigated in a well and in an outcrop from the Stoeneşti -Cetăţeni area (Dâmboviţa Valley), Romania. The benthic foraminiferal extinction that occurred at the Cenomanian/Turonian boundary and the first stage of the faunal recovery are documented here for the first time in the Romanian Carpathians. Bioevents and changes in the foraminiferal record from this area show that low oxygen conditions occured already in the Late Cenomanian, as suggested by the presence of radiolarian-rich shales. Impoverished assemblages of small, thin walled agglutinated foraminifera are present in the lowermost Turonian after the benthic-free interval corresponding to the "Bonarelli Level". Calcareous nannofossils are also documented from this level in the well from the Stoeneşti locality.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Biostratigraphy of the Cenomanian-Turonian boundary in the Eastern Carpathians (Dâmboviţa Valley): preliminary observations

Cetean¹,

Bălc²,

Kaminski³

et al. 2008

Studia UBB, Geologia

View full text Add to dashboard Cite

show abstract

“…The organic-rich horizon, about 2.2 m thick, visible in both studied sections (Figs 2, 3), represents sediments of the oceanic anoxic event (OAE2), as was documented using stable carbon isotope stratigraphy by K. Bąk (2006Bąk ( , 2007a. This horizon is overlain by the first ferromanganese layer (about 10 cm thick), a chronohorizon in the Polish Outer Carpathians (K. Bąk 2007d), in which the first red siliceous claystone layer occurs.…”

Section: Stratigraphymentioning

confidence: 58%

Lithistid spicules in the sediments of the Turonian Variegated Shale in the Silesian Nappe, Polish Outer Carpathians

Okoński

Górny

Bąk

et al. 2014

geol

Self Cite

View full text Add to dashboard Cite

Turbiditic silty and sandy intercalations in the Turonian Variegated Shale from the Silesian Nappe (Polish Outer Carpathians) contain numerous sponge spicules among siliciclastic fine-grained particles. The highest amount of spicule admixture is nearly 50%. In such layers, they create spiculitic sublitharenite microfacies. These sponge spicules contain forms belonging mostly to the Lithistida group (97% of morphotypes), with a small admixture of spicules from the Hexactinellidae group. Tetraclones with a high content of different types of triaenes dominate among desmas, what indicates the dominance of sponges from subfamily Tetracladina. The preservation state of spicules is generally poor. The Variegated Shale deposits that contain the sponge spicules were accumulated in a deep sea basin, below the calcium compensation depth. Most probably, the spicules were derived from loose material accumulated earlier in various parts of the basin slopes, from which they were exhumed and again redeposited by turbidity currents during the Turonian times.

show abstract

“…The sponge spicules do not occur in the uppermost Cenomanian-lowermost Turonian diluted turbidites in the Silesian Nappe of the studied area (Bąk K. 2006(Bąk K. , 2007aBąk M. 2011). This is related to changes in basinal circulation and expansion of the oxygen minimum zone on the shelves corresponding to the OAE2 from one side and to a high-stand of sea level (compare Haq 2014) from the second side, which limited the supply of material from the shelves to the deep basins.…”

Section: Abundant Sponge Communities Along the Northern Edge Of The Cmentioning

confidence: 82%

Sponge growth on the Cenomanian carbonate shelves of the Carpathian Basin: a record from spicule-rich turbidites

Bąk¹,

Górny²,

Bąk³

2015

Bull. Geosci.

View full text Add to dashboard Cite

The composition and features of numerous bioclasts found in the sandy/silty fraction of turbidite layers in the Middle-Upper Cenomanian deep-water sediments of the Silesian Nappe in the Outer Carpathians, dominated by sponge spicules, suggest that they originated from the growth and destruction of sponge assemblages formed on shelves of the northern margin of the Silesian Basin. The morphological types of spicules, by comparison with fossil and living species, lead to their attribution predominantly to three orders: Lithistida, Hadromerida and Astrophorida. Sponges lived in association with other benthic fauna such as calcareous benthic foraminifers and echinoids. Many sponge spicules were calcified in their primary environment before their redeposition by turbiditic flows. Favourable conditions for development of sponge assemblages occurred during the Cenomanian transgressions, being related to balanced delivery of sediment particles trapped by sponges and waters enriched with nutrients. The amount of nutrients absorbed by sponges is related to the dissolved silica content that originated from two sources: 1) terrestrial chemical weathering on the low-gradient plains of the shelves and 2) opal grains, such as siliceous plankton, suspended in the water column during bloom periods forced by seasonal upwelling. •

show abstract

Sedimentological, geochemical and microfaunal responses to environmental changes around the Cenomanian–Turonian boundary in the Outer Carpathian Basin; a record from the Subsilesian Nappe, Poland

Cited by 25 publications

References 57 publications

Biostratigraphy of the Cenomanian-Turonian boundary in the Eastern Carpathians (Dâmboviţa Valley): preliminary observations

Biostratigraphy of the Cenomanian-Turonian boundary in the Eastern Carpathians (Dâmboviţa Valley): preliminary observations

Lithistid spicules in the sediments of the Turonian Variegated Shale in the Silesian Nappe, Polish Outer Carpathians

Sponge growth on the Cenomanian carbonate shelves of the Carpathian Basin: a record from spicule-rich turbidites

Contact Info

Product

Resources

About