Triassic-Jurassic Vegetation Response to Carbon Cycle Perturbations and Climate Change

Bos, Remco; Lindström, Sofie; Cittert, Johanna van Konijnenburg‐van; Hilgen, F.J.; Hollaar, Teuntje P.; Aalpoel, Hendrik; Weijst, Carolien van der; Sanei, Hamed; Rudra, Arka; Sluijs, Appy; Schootbrugge, Bas van de

doi:10.2139/ssrn.4371814

Cited by 2 publications

(23 citation statements)

References 141 publications

(256 reference statements)

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“…Palynological records from various wells and sites in the North German Basin largely follow the zonation established by Lund (1977Lund ( , 2003, and the palynofloras there generally follow the same trends as at Stenlille (Heunisch et al 2010;Barth et al 2018;Gravendyck et al 2020;Bos et al 2023). However, in North German Basin records, in contrast to the Danish Basin records, cheirolepidiacean pollen are often more abundant than Perinopollenites elatoides, in particular after the equivalents of the PRD Zone.…”

Section: Age and Duration Of The Stenlille Spore-pollen Zonesmentioning

confidence: 57%

“…As discussed by Lindström, van de Schootbrugge et al (2017), R. tuberculatus declines markedly in abundance in the lower part of the Ricciisporites – Polypodiisporites Zone in Mariental-1, while it is abundant to dominant in the PRD Zone in Stenlille. In the Bonenburg record, R. tuberculatus is abundant to dominant within the RP zone of Gravendyck et al (2020), and this is also the case in Schandelah-1 (Bos et al 2023). In all three records P. polymicroforatus is an abundant to dominant constituent of the zone, together with laevigate triangular trilete spores assigned to Deltoidospora or Concavisporites.…”

Section: Discussionmentioning

confidence: 80%

“…The PiK zone most likely corresponds to the DPPi Zone at Stenlille, as it, compared to Mariental, lacks aberrant Deltoidospora- type spores. However, this correlation suggests that there is a hiatus between the RP zone and the PiK zone at Bonenburg, or that this part of the section is highly condensed, similar to the closely located Schandelah-1 succession (see discussion in Lindström, van de Schootbrugge et al 2017; van de Schootbrugge et al 2019; Bos et al 2023).…”

Section: Discussionmentioning

confidence: 97%

“…In contrast to Bonenburg and similarly to Stenlille, there is an increase in Deltoidospora- type spores and a decrease in Classopollis and R. tuberculatus in the uppermost sample of the Rhaetipollis Limbosporites Zone in Mariental-1 (Heunisch et al 2010; Barth et al 2018). In Schandelah-1 the decrease in Classopollis in the uppermost RLi zone, equivalent to the Rhaetipollis Limbosporites Zone, is also evident (Bos et al 2023).…”

Section: Discussionmentioning

confidence: 99%

“…The Triletes Beds in Bonenburg and Mariental-1, as well as in Schandelah-1, are assigned to equivalents of the Ricciisporites-Polypodiisporites Zone of Lund (1977) (Heunisch et al 2010; Barth et al 2018; Gravendyck et al 2020; Bos et al 2023) and can be correlated with the PRD Zone of Stenlille (Figure 3). At all four localities this interval is associated with more positive δ 13 C org values (Lindström et al 2012; van de Schootbrugge et al 2013; Lindström, Erlström et al 2017; Lindström, van de Schootbrugge et al 2017; Schobben et al 2019; Bos et al 2023) compared to the previous zone. Again, there appear to be some local differences in the palynofloras.…”

Section: Discussionmentioning

confidence: 99%

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Palynology of the Triassic–Jurassic transition of the Danish Basin (Denmark): a palynostratigraphic zonation of the Gassum–lower Fjerritslev formations

Lindström,

Pedersen,

Vosgerau

et al. 2023

Palynology

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The Upper Triassic-Lower Jurassic succession in the Danish Basin is penetrated by many deep wells that were drilled during former hydrocarbon exploration campaigns, but it is today targeted for geothermal energy and storage of CO 2 . The Stenlille salt dome on Sjaelland sandstones of the Gassum Formation, sealed by the overlying Fjerritslev Formation mudstones, has been used for decades as a seasonal storage for natural gas. With its comprehensive dataset of seismics, geophysical well logs and conventional core data from 20 wells, the Stenlille succession serves as a model for other salt domes currently being evaluated as potential CO 2 storage sites in the basin. Over the last decade the cored Triassic-Jurassic boundary succession has contributed to the understanding of environmental and palynological events during the end-Triassic mass extinction. Core, sidewall core and cutting samples from several of the closely situated Stenlille wells are here used to establish a high-resolution palynostratigraphic zonation scheme covering the entire Rhaetian to Sinemurian succession by integrating new analyses with previously published data. The palynological dataset has allowed the recognition of nine formally described sporepollen zones, of which eight are new, while two previously described dinoflagellate cyst zones are subdivided into three informal subzones each. The palynological zonation is integrated with a sequence stratigraphic framework and will form the basis for the dating of future well sections in the Danish Basin and other basins and for correlation to outcrops. The large palynological dataset further shows that the vegetation around the Danish Basin was remarkably stable during the early to middle Rhaetian, but that events related to the emplacement of the Central Atlantic Magmatic Province accelerated ecosystem changes for c. 175 ky in the late Rhaetian and earliest Hettangian, including $25 ky of successional recovery before the terrestrial ecosystem had again stabilised.

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Section: Age and Duration Of The Stenlille Spore-pollen Zonesmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 80%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Palynology of the Triassic–Jurassic transition of the Danish Basin (Denmark): a palynostratigraphic zonation of the Gassum–lower Fjerritslev formations

Lindström,

Pedersen,

Vosgerau

et al. 2023

Palynology

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Climate-forced Hg-remobilization driving mutagenesis in ferns in the aftermath of the end-Triassic extinction

Bos,

Zheng,

Lindström

et al. 2023

Preprint

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The long-term effects of the Central Atlantic Magmatic Province (CAMP), a large igneous province connected to the end-Triassic mass-extinction (201.5 Ma), remain largely elusive. Here, we document the persistence of volcanic-induced mercury pollution and its effects on the biosphere for 2 million years after the extinction event. In sediments recovered in Germany (Schandelah-1 core), we record not only high abundances of malformed fern spores at the Triassic-Jurassic boundary, but also during the Hettangian, indicating repeated vegetation disturbance and environmental stress that was eccentricity forced. Crucially, these abundances correspond to spikes in sedimentary Hg concentrations. Hg-isotope ratios (δ202Hg, Δ199Hg) indicate a volcanic source at the Triassic-Jurassic boundary but a terrestrial source for the early Jurassic peaks. We conclude that Hg injected by CAMP across the extinction was repeatedly remobilized from coastal wetlands and hinterland areas during eccentricity-forced phases of severe hydrological upheaval and erosion, focusing Hg-pollution in shallow marine basins.

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Triassic-Jurassic Vegetation Response to Carbon Cycle Perturbations and Climate Change

Cited by 2 publications

References 141 publications

Palynology of the Triassic–Jurassic transition of the Danish Basin (Denmark): a palynostratigraphic zonation of the Gassum–lower Fjerritslev formations

Palynology of the Triassic–Jurassic transition of the Danish Basin (Denmark): a palynostratigraphic zonation of the Gassum–lower Fjerritslev formations

Climate-forced Hg-remobilization driving mutagenesis in ferns in the aftermath of the end-Triassic extinction

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