Environmental footprints of the early Maastrichtian cooling – The record of benthic foraminifera from northern Germany

Linnert, Christian; Engelke, Julia; Wilmsen, Markus; Mutterlose, Jörg

doi:10.1016/j.cretres.2019.01.014

Cited by 6 publications

(5 citation statements)

References 63 publications

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“…The prosperity of benthos is related to a sufficient supply of food on the seafloor, whereas epiplankton (e.g. foraminifera and ammonoids) are considered to be abundant in the case of decreased nutrition in the bottom water (Didié et al 2002; Linnert et al 2019).…”

Section: Discussionmentioning

confidence: 99%

“…Bioclasts at the bottom of the Shangsi section are dominated by siliceous radiolarians, suggesting a pelagic environment. The significant differences between bioassemblages in the three environments can be attributed to water depth, oxygen content and food supply (Itaki, 2003;Flügel, 2010;Pérez-Asensio et al 2012;Linnert et al 2019). Under relatively deep conditions, deficient oxygen and low temperature led to the development of small-bodied, thin-shelled organisms.…”

Section: A2 Sedimentary Facies Characteristicsmentioning

confidence: 99%

“…In contrast, high-diversity communities contain large amounts of littoral organisms associated with calcareous algae, crinoids and trilobites in oxygen-rich shallow-marine settings. Food supply determines the number of marine species (Linnert et al 2019). The prosperity of benthos is related to a sufficient supply of food on the seafloor, whereas epiplankton (e.g.…”

Section: A2 Sedimentary Facies Characteristicsmentioning

confidence: 99%

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What continued after the mass extinction: insights from carbonate microfacies and biological evolution around the Permian–Triassic boundary in the middle Upper Yangtze Platform, SW China

Gong

Gao²,

Stow³

et al. 2022

Geol. Mag.

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At the end of the Palaeozoic Era, most species on Earth disappeared completely and the global sedimentary environment and biology changed dramatically. The Permian–Triassic boundary (PTB) was studied in three sections of the middle Upper Yangtze Platform, SW China: Xingwen well and Zhijin and Shangsi sections. These sections are characterized by carbonate-platform, toe-of-slope and basin facies, respectively. Detailed analysis of 100 closely spaced thin-sections revealed a total of 24 microfacies and 11 microfacies associations based on the dominant carbonate grain size and the skeletal material (type and proportion). Six bioassemblages are documented for the first time, spanning c. 1 Ma across the boundary succession, including normal, resurrected and miniaturized Permian biota, and cyanobacteria-dominated, survival post-crisis and neonatal Triassic biota. The Xingwen well indicated sedimentary evolution from a rimmed carbonate platform to a homoclinal carbonate ramp, as well as a sharp fall in sea level just prior to the PTB in the study area. The Zhijin section revealed a slope setting, in which toe-of-slope and middle-ramp microfacies are identified. The Shangsi section showed a complete evolution of basin and outer-ramp microfacies and bioassemblages. Fossil evidence showed that the Permian biota (trilobites, gastropods and phylloid algae) occurred in the uppermost Changhsingian stage and was overlain by biomicrites with miniaturized ostracods (< 0.2 mm in size). This indicated that the major extinction horizon is located up to 14 cm below the PTB, which lies in the middle–lower segments of the miniaturized ostracod layer.

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Section: Discussionmentioning

confidence: 99%

Section: A2 Sedimentary Facies Characteristicsmentioning

confidence: 99%

Section: A2 Sedimentary Facies Characteristicsmentioning

confidence: 99%

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What continued after the mass extinction: insights from carbonate microfacies and biological evolution around the Permian–Triassic boundary in the middle Upper Yangtze Platform, SW China

Gong

Gao²,

Stow³

et al. 2022

Geol. Mag.

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“…This is consistent with the dominance of Cibicidoides (Figs. 7 and 8), a genus that is indicative of well-oxygenated environments (Kaiho, 1994;Linnert et al, 2019), throughout the record. The benthic foraminiferal diversity did not decrease across the events (Fig.…”

Section: Comparison Between Type-maastrichtian and The Oceanic Recordsmentioning

confidence: 99%

“…This indicates that the nannoplankton production (which makes up the bulk of the sediment) was similar in both intervals, arguing against the hypotheses of increased surface water productivity. Alternatively, the continuous precipitation of chalk under nutrient-poor (oligotrophic to mesotrophic) conditions in the Cretaceous chalk sea (Linnert et al, 2019) was possible because of efficient nutrient recycling in the water column. In the shallower depositional setting of the Lanaye Member, nutrient recycling took place close to the seafloor, which allowed more organic matter to reach the seafloor (Fig.…”

Section: Nutrient Recycling In the Nw-european Chalk Seamentioning

confidence: 99%

The benthic foraminiferal response to the mid-Maastrichtian event in the NW-European chalk sea of the Maastrichtian type area

Vancoppenolle

Vellekoop

Doubrawa

et al. 2022

Netherlands Journal of Geosciences

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The mid-Maastrichtian carbon isotope event (MME), dated at ∼69 Ma, reflects a perturbation of the global carbon cycle that, in part, correlates with the enigmatic global extinction of ‘true’ (i.e., non-tegulated) inoceramid bivalves. The mechanisms of this extinction event are still debated. While both the inoceramid extirpation and MME have been recorded in a variety of deep-sea sites, little is known about their expression in epicontinental chalk seas. In order to study the shallow-marine signature of the MME in this epicontinental shelf sea, we have generated quantitative foraminiferal assemblage data for two quarries (Hallembaye, NE Belgium; ENCI, SE Netherlands) in the Maastrichtian type area, complemented by a species-specific benthic δ13C record. In contrast to deep-sea records, no significant changes in benthic foraminiferal assemblages and benthic foraminiferal accumulation rates are observed across the MME in the type-Maastrichtian area. At the Hallembaye quarry, the otherwise rare endobenthic species Cuneus trigona reaches a transient peak abundance of 33.3% at the onset of the MME, likely caused by a local transient change in organic matter flux to the seafloor. Nevertheless, high and near-constant species evenness shows that neither oxygen nor organic matter flux was limited across the extinction level or during the MME. Benthic foraminiferal data from the uppermost part of the studied section, above the MME, indicate a significant increase in food supply to the seafloor. Decreased amounts of terrigenous elements across this interval document a lesser riverine or aeolian influx, which means that the increased benthic productivity is linked to a different origin. Potentially, the continuous precipitation of chalk under nutrient-poor conditions in the Late Cretaceous chalk sea was enabled by efficient nutrient recycling in the water column. In shallower depositional settings, nutrient recycling took place closer to the seafloor, which allowed more organic matter to reach the bottom. These results provide insights in the importance of nutrient cycling for biological productivity in the NW-European chalk sea.

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Paleoenvironmental changes recorded at a late Maastrichtian marine succession of northern South America

Patarroyo

Kochhann

Ceolín

et al. 2022

Journal of South American Earth Sciences

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Environmental footprints of the early Maastrichtian cooling – The record of benthic foraminifera from northern Germany

Cited by 6 publications

References 63 publications

What continued after the mass extinction: insights from carbonate microfacies and biological evolution around the Permian–Triassic boundary in the middle Upper Yangtze Platform, SW China

What continued after the mass extinction: insights from carbonate microfacies and biological evolution around the Permian–Triassic boundary in the middle Upper Yangtze Platform, SW China

The benthic foraminiferal response to the mid-Maastrichtian event in the NW-European chalk sea of the Maastrichtian type area

Paleoenvironmental changes recorded at a late Maastrichtian marine succession of northern South America

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