The mid-Cretaceous palaeoenvironmental conditions in the Polish Carpathians—a palynological approach

Jaminski, Jacek

doi:10.1016/0034-6667(94)00141-6

Cited by 9 publications

(2 citation statements)

References 6 publications

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“…A peridinioid-dominated assemblage reflects low salinity and nutrient-rich conditions (Jaminski 1995) related to near-shore environments. In contrast, low values of the ratio, i.e., gonyaulacoid-dominated assemblages, indicate open marine environments.…”

Section: Figure 2 -Lithological Profile Of Lachman Crags Section (Lc)mentioning

confidence: 99%

Santonian dinocyst assemblages of the Santa Marta Formation, Antarctic Peninsula: Inferences for paleoenvironments and paleoecology

Castro

Carvalho

2015

An. Acad. Bras. Ciênc.

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To better understand the paleoenvironments of the lower-middle Santonian, dinocyst data were obtained from the Santa Marta Formation, Larsen Basin, James Ross Island, Antarctic Peninsula. This study provides the first available quantitative dinocyst data for the Santa Marta Formation, which should more clearly reflect detailed changes in paleoenvironments, as recorded by fluctuations in diversity and abundance. To record the Santonian dinocyst assemblages from the Larsen Basin, 30 samples from an outcrop of the Lachman Crags Member (LC section) were analyzed. These assemblages are dominated by peridiniacean dinocysts typical of the Isabelidinium flora. A lower-middle Santonian age was determined after the recognition of Odontochitina porifera and Isabelidinium cretaceum zones. Cluster analysis based on quantitative data, yielded five dinocyst assemblages: Manumiella, Heterosphaeridium, Chlamydophorella, Isabelidinium and Odontochitina. Two Santonian blooms, Isabelidinium and Odontochitina, recognized in other regions were also recorded in the studied section. The stratigraphic distribution shows an alternation between the assemblages, distinguishing in the section six intervals. The high abundance of the Manumiella assemblage at the uppermost interval of the section represents the shallower setting, whereas the high abundance of Odontochitina at the middle part of the section represents the deepest setting.

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Section: Figure 2 -Lithological Profile Of Lachman Crags Section (Lc)mentioning

confidence: 99%

Santonian dinocyst assemblages of the Santa Marta Formation, Antarctic Peninsula: Inferences for paleoenvironments and paleoecology

Castro

Carvalho

2015

An. Acad. Bras. Ciênc.

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“…The protoperidinioid/ gonyaulacoid cysts ratio in the record (Table S1) suggests higher productivity and hydrological surface circulation in the wMed during the Tortonian, than in the pre-evaporitic Messinian, but lower during the Zanclean, probably reflecting the restriction of the Tortonian wide connections with the Atlantic. The ratio of protoperidinioid over gonyaulacoid cysts is an indicator of the abundance of cysts produced by heterotrophic versus autotrophic dinoflagellates ( 77 ), and it is considered a measure of primary productivity. However, information on preservation can also be contained in this index ( 78 ), as well as bias due to the sample processing method ( 79 ).…”

Section: Supplementary Materialsmentioning

confidence: 99%

Late Miocene transformation of Mediterranean Sea biodiversity

Agiadi,

Hohmann,

Gliozzi

et al. 2024

Preprint

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Understanding deep-time marine biodiversity change under the combined effects of climate and connectivity changes is fundamental for predicting the impacts of modern climate change in semi-enclosed seas. We quantify the Late Miocene-Early Pliocene (11.63-3.6 Ma) taxonomic diversity of the Mediterranean Sea for calcareous nannoplankton, dinocysts, foraminifera, ostracods, corals, molluscs, bryozoans, echinoids, fishes, and marine mammals. During this time, marine biota was affected by global climate cooling and the restriction of the Mediterranean's connection to the Atlantic Ocean that peaked with the Messinian Salinity Crisis. Although the net change in species richness from the Tortonian to the Zanclean varies by group, species turnover is greater than 30% in all cases. The results show clear perturbation already in the pre-evaporitic Messinian (7.25-5.97 Ma), with patterns differing among groups and sub-basins.

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Paleoenvironmental reconstruction of the upper Cretaceous succession (Abtalkh Formation) of the Kopeh-Dagh Basin, northeastern Iran based on foraminiferal and palynological analyses

et al. 2014

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The mid-Cretaceous palaeoenvironmental conditions in the Polish Carpathians—a palynological approach

Cited by 9 publications

References 6 publications

Santonian dinocyst assemblages of the Santa Marta Formation, Antarctic Peninsula: Inferences for paleoenvironments and paleoecology

Santonian dinocyst assemblages of the Santa Marta Formation, Antarctic Peninsula: Inferences for paleoenvironments and paleoecology

Late Miocene transformation of Mediterranean Sea biodiversity

Paleoenvironmental reconstruction of the upper Cretaceous succession (Abtalkh Formation) of the Kopeh-Dagh Basin, northeastern Iran based on foraminiferal and palynological analyses

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