Multistratigraphic records of the Lower Cretaceous (Valanginian–Cenomanian) Puez key area in N. Italy

Lukeneder, Alexander; Soták, Ján; Jovane, Luigi; Giorgioni, M.; Savian, Jairo Francisco; Halásová, Eva; Reháková, Daniela; Józsa, Štefan; Kroh, Andreas; Florindo, Fabio; Sprovieri, Mario

doi:10.1016/j.palaeo.2016.01.043

Cited by 6 publications

(4 citation statements)

References 136 publications

(208 reference statements)

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“…Organic nitrogen derives mostly from peptides and amino acids of planktonic organisms 61 and can therefore be used as an indicator for planktonic productivity. These data are comparable to modern data by 62 – 66 who showed that the distribution and abundance of N are correlated to TOC. Nitrogen availability often limits biological production, both in terrestrial and in marine environments.…”

Section: Introductionsupporting

confidence: 90%

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Multi-proxy record of the Austrian Upper Triassic Polzberg Konservat-Lagerstätte in light of the Carnian Pluvial Episode

Lukeneder,

Sachsenhofer

et al. 2024

Sci Rep

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We present a multi-proxy investigation of a lower Carnian basinal succession from Polzberg in the Northern Calcareous Alps (Lower Austria). A section comprising a unique Konservat-Lagerstätte was studied based on bio- and chemostratigraphy along with geophysical methods, yielding a detailed and robust stratigraphic calibration of the Polzberg succession. The Polzberg section revealed the paleoceanographic history and helped to identify a global climatic reversal, the Carnian Pluvial Episode. The age of the Upper Triassic Reingraben formation in the Northern Calcareous Alps is refined as the Austrotrachyceras austriacum Zone within the lower Carnian (Julian 2). Ammonoids and conodonts provide a detailed biostratigraphic subdivision that serves as a basis for analyses of the faunal distribution and the paleoenvironmental evolution of the Upper Triassic Reifling Basin. The succession includes lithological and facies changes similar to those of coeval units in the Tethys. The Carnian was characterized by a weak (~ 1‰) positive δ13C trend, punctuated by a negative shift during the lower Carnian corresponding to the initiation of the Carnian Pluvial Episode, a period representing the onset of early/late Carnian transitional global greenhouse conditions. Organic maturity parameters and the conodont alteration index (CAI) show that the thermal overprint of the Polzberg section is low. Biomarker proxies suggest that the organic matter of the uppermost Göstling formation is a mixture of marine and terrestrial material deposited in a dysoxic environment. Within the overlaying Reingraben formation, the amount of marine biomass decreased gradually upwards. Oxygen-depleted conditions, probably due to water-column stratification, continued during deposition of the Reingraben formation. Bacterial sulfate reduction played a major role in organic matter degradation.

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Section: Introductionsupporting

confidence: 90%

“…The grey-scale data (0 = black, max. 255 = white, no dimension) indicate relative brightness intensity and were obtained by scanning 26 polished rock samples on a flatbed scanner (Epson Perfection 4990 Photo; method in Lukeneder et al 66 , 77 ).…”

Section: Methodsmentioning

confidence: 99%

Multi-proxy record of the Austrian Upper Triassic Polzberg Konservat-Lagerstätte in light of the Carnian Pluvial Episode

Lukeneder,

Sachsenhofer

et al. 2024

Sci Rep

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“…Climatic conditions in different periods of the Early Cretaceous seem to experience significant changes, especially a humid and stable climate that prevailed globally in the middle Early Cretaceous (Föllmi, 2012). The belemnite δ 18 O record of central Italy gradually evolved to a lighter value from early to late Hauterivian, and characterized by a minimum in the latest Hauterivian (Lukeneder et al, 2016). A similar trend occurs in the belemnite δ 18 O record of Hungary from the Hauterivian (Bodin et al, 2009; McArthur et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Long‐term arid and hot climate during early Mid‐Cretaceous indicate by unvaried Cheirolepidiaceae‐dominant palynoflora from the Liupanshan Basin, China

et al. 2023

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The Mid‐Cretaceous was characterized by long‐term and stabilized high temperatures confirmed by numerous palaeoclimatic information from marine sedimentary archives. However, few terrestrial records have yet been employed to verify the terrestrial humidity under this long‐term hot climate. The Liupanshan Basin, located in central China during the Cretaceous contains thick Aptian‐Albian sediments. Here, we reconstructed a long‐term palaeovegetational record during late Aptian to Albian from the Huoshizhai Section and Sikouzi Section, Liupanshan Basin. Five palynological assemblages were defined from the bottom to top of these strata, and a total of 124 types of palynomorphs including 47 spore species and 77 gymnosperm pollen species were recognized in the palynological assemblages. Sporopollen analysis revealed that the spore‐pollen spectra of Huoshizhai Section were dominated by Perinopollenites and Bisaccate pollen. In Sikouzi section, the Classopollis content dominate in all samples (average 63.8%), with a few other pollen, including conifer bisaccates types, Perinopollenites, Jiaohepollis, Ephedripites, Cycadopites and a few spores. The sporopollen assemblage reflected that the flora of the central Asia continent gradually changed from Taxodiacean‐dominated to Cheirolepidiaceae‐dominated in the late Aptian and the Albian, which further indicates that the central Asia continent palaeoclimate gradually changed from a wet and cold climate to a long‐term dry and hot climate with small fluctuation. In addition, the Classopollis content also presented a slightly increased trend from late Aptian to late Albian, which probably indicated a gradually intensified hot and dry climate. The thermophilic floral changes and warmer/cooler ratio of the Sporomorph Ecogroup Model at the middle Madonghshan Formation also shows slightly decreased trends which correspond to the global short‐term cooling events at the Aptian‐Albian transition.

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“…These tests show that the interval of the series sampled at 0.1mis suitable for the recognition of the actual amplitude of the eccentricity cycles and thus viable for astronomical tuning.5.6. Origin of the cyclicities in the record The origin of the observed Milankovitch cyclicities in the measured proxy signals is most likely related to the variation in terrestrially-derived detrital input (e.g., Cotillon, 1987;Mutterlose and Ruffell, 1999;Reboulet et al, 2003;Sagasti, 2005;Martinez et al, 2015;Lukeneder et al, 2016). The intensification of the hydrological cycle typical during more humid periods is likely to correspond to an increase in detrital material.…”

Section: Impact Of the Sample Distance On The Cyclostratigraphic Intementioning

confidence: 99%

Multi-proxy record of orbital-scale changes in climate and sedimentation during the Weissert Event in the Valanginian Bersek Marl Formation (Gerecse Mts., Hungary)

Bajnai

Pálfy

Martínez

et al. 2017

Cretaceous Research

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The Valanginian positive carbon isotope excursion and associated environmental changes, known as the Weissert Event, is the first in the series of Cretaceous Earth system perturbations. Here, we develop a multiproxy cyclostratigraphy from a 31.2-m-thick Upper Valanginian to lowermost Hauterivian section of the Bersek Marl Formation in Gerecse Mountains, Hungary, comprising alternating marlstone layers of varying clay and carbonate content. The bulk carbonate d13C signal shows sustained, elevated values (up to 2.7‰) up to 19.2 m, followed by a decreasing trend upsection. Together with biostratigraphic data, this suggests that the lower part of the section was deposited during the plateau phase of the Late Valanginian Weissert Event. Spectral analyses of the multiproxy dataset, including magnetic susceptibility measurements and gamma-ray spectroscopy on the lower part of the section, led to the identification of precession, obliquity, and long and short eccentricity signals. A mean sedimentation rate of 14 m/Myr was calculated based on astronomical tuning. The cyclicity in the proxy signals reflects dilution cycles induced by the fluctuating rate of detrital runoff into the basin. This supports the idea that orbitally forced humid-arid cycles controlled the pelagic alternating sedimentation during the Early Cretaceous throughout the Tethyan area.

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Multistratigraphic records of the Lower Cretaceous (Valanginian–Cenomanian) Puez key area in N. Italy

Cited by 6 publications

References 136 publications

Multi-proxy record of the Austrian Upper Triassic Polzberg Konservat-Lagerstätte in light of the Carnian Pluvial Episode

Multi-proxy record of the Austrian Upper Triassic Polzberg Konservat-Lagerstätte in light of the Carnian Pluvial Episode

Long‐term arid and hot climate during early Mid‐Cretaceous indicate by unvaried Cheirolepidiaceae‐dominant palynoflora from the Liupanshan Basin, China

Multi-proxy record of orbital-scale changes in climate and sedimentation during the Weissert Event in the Valanginian Bersek Marl Formation (Gerecse Mts., Hungary)

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