Onset of carbonate biomineralization drove global reorganization of sedimentation and subsidence patterns

Bergmann, Kristin; Wilcots, Julia; Pico, Tamara; Boekelheide, Nicholas; Anderson, Nancy; Cantine, Marjorie; Keller, C. Brenhin; Jost, A. B.; Eyster, Athena

doi:10.1002/essoar.10511913.1

Cited by 2 publications

(3 citation statements)

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“…There is also evidence for methane associated with Shuram excursion strata (14), which, if significant, could amplify rapid climate warming. Additionally, the DIC reservoir in the Ediacaran may have been larger (57,58) than in the PETM (29). In a higher DIC ocean in the Ediacaran, an increase in temperature due to external volcanic forcing has potential to amplify warming through increased CO2 release to the atmosphere as solubility drops (58).…”

Section: Diagenetic Alteration Of Strata Hosting the Shuram Excursionmentioning

confidence: 99%

“…Spatial heterogeneity in elemental enrichments, organic abundance, and organic δ 13 C differences between shallow and deep-water environments in Oman are consistent with a high temperature perturbation driving density and redox stratification. If carbonate deposition was often sluggish and inhibited and the depositional area was largely limited to shallow water environments (58,62), the residence time of carbon would have been long, providing a mechanism to prolong the excursion.…”

Section: Diagenetic Alteration Of Strata Hosting the Shuram Excursionmentioning

confidence: 99%

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The Shuram excursion: A response to climate extremes at the dawn of animal life

Bergmann

Osburn²,

Wilcots

et al. 2022

Preprint

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The Ediacaran-aged Shuram excursion was the last and largest of the Neoproterozoic negative carbon isotope anomalies. Recognized in stratigraphic successions around the globe, it precedes diverse evidence for macroscopic, multicellular life, and follows the Cryogenian global glaciations and Ediacaran Gaskiers glaciation. Hypotheses for the cause of the Shuram excursion can be broadly grouped into those that argue for post-depositional diagenetic alter-1

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Section: Diagenetic Alteration Of Strata Hosting the Shuram Excursionmentioning

confidence: 99%

Section: Diagenetic Alteration Of Strata Hosting the Shuram Excursionmentioning

confidence: 99%

The Shuram excursion: A response to climate extremes at the dawn of animal life

Bergmann

Osburn²,

Wilcots

et al. 2022

Preprint

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“…Long-term cooling trends may reflect coupling between tectonic drivers of climate change (i.e., (67)) and long-term changing reservoir sizes from enhanced carbon sequestration into carbonate sediments and organic matter deposition on flooded continental crust in the early Paleozoic (68,69), into terrestrial biomass following land plant evolution (70), and into deep marine carbonates following the diversification of planktonic biomineralizing organisms in the Cretaceous and Cenozoic (71, 72)(Fig. 4).…”

Section: Time-dependent Variability Across Materialsmentioning

confidence: 99%

Temperature: a key driver of Earth's habitability over the last billion years

Bergmann

Boekelheide

Clarke

et al. 2022

Preprint

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The habitability and ecology of Earth is fundamentally shaped by surface temperature, but the temperature history of our planet is not easily reconstructed, especially before the evolution of early biomineralizing animals. This work presents a billion-year-long, high-resolution, mineral-specific record of oxygen isotope measurements in shallow marine rocks. Clumped isotope paleothermometry results from four minerals resolves previous ambiguity in seawater oxygen isotope composition and confirms that long-term cooling punctuated by short-lived temperature extremes are dominant components of this record. We consider post-depositional effects by comparing Phanerozoic rock and fossil records, and identify temporal and spatial controls on alteration. Furthermore, this record is suggestive of key differences in dolomite (CaMg(CO3)2) formation processes between the Neoproterozoic (1000-538.8 Ma) and Phanerozoic (538.8-0 Ma), consistent with previous suggestions based on petrographic and sedimentological observations. This record, when viewed alongside the fossil record, suggests temperature change is tightly coupled to extinction and origination in the history of life and carbon cycle perturbations over the last billion years.

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Onset of carbonate biomineralization drove global reorganization of sedimentation and subsidence patterns

Cited by 2 publications

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The Shuram excursion: A response to climate extremes at the dawn of animal life

The Shuram excursion: A response to climate extremes at the dawn of animal life

Temperature: a key driver of Earth's habitability over the last billion years

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