It has been argued that the beginning of significant pelagic calcification could have been linked to the Carnian Pluvial Episode (CPE), a climate change in the Late Triassic (~234–232 Ma) that was marked by C-cycle disruption and global warming. Nevertheless, abundant calcareous nannofossils have been described so far only in post-CPE rocks, and therefore no conclusive hypotheses can be drawn on possible causal links with it. Here we show that in deep-water successions of the Western Tethys, Orthopithonella calcispheres interpreted as calcareous dinocysts became an important component of carbonate sedimentation from the onset of the CPE, and could constitute up to 8% of hemipelagic limestones. Before the CPE, in similar depositional environments, calcispheres are rare or absent, and never constitute a significant part of the sediment. This change in the deep-water carbonate sedimentation, is mirrored in the shallow water environments by the rise of the reefs built by Scleractinia corals. These important innovations in Earth's carbonate systems may indicate a deep modification in the ocean biogeochemistry during the CPE.
Dal Corso J., Preto N., Agnini C., Hohn S., Merico A., Willems H. and Gianolla P. (2021) Rise of calcispheres during the Carnian Pluvial Episode (Late Triassic). 200: 103453. 10.1016/j.gloplacha.2021.103453
@article{Dal Corso2021,
Title = {Rise of calcispheres during the Carnian Pluvial Episode (Late Triassic)},
Author = {Dal Corso, Jacopo and Preto, Nereo and Agnini, Claudia and Hohn, Sönke and Merico, Agostino and Willems, Helmut and Gianolla, Piero},
Editor = {},
Year = {2021},
Pages = {103453},
Volume = {200},
Doi = {10.1016/j.gloplacha.2021.103453},
Abstract = {It has been argued that the beginning of significant pelagic calcification could have been linked to the Carnian Pluvial Episode (CPE), a climate change in the Late Triassic (~234–232 Ma) that was marked by C-cycle disruption and global warming. Nevertheless, abundant calcareous nannofossils have been described so far only in post-CPE rocks, and therefore no conclusive hypotheses can be drawn on possible causal links with it. Here we show that in deep-water successions of the Western Tethys, Orthopithonella calcispheres interpreted as calcareous dinocysts became an important component of carbonate sedimentation from the onset of the CPE, and could constitute up to 8% of hemipelagic limestones. Before the CPE, in similar depositional environments, calcispheres are rare or absent, and never constitute a significant part of the sediment. This change in the deep-water carbonate sedimentation, is mirrored in the shallow water environments by the rise of the reefs built by Scleractinia corals. These important innovations in Earth's carbonate systems may indicate a deep modification in the ocean biogeochemistry during the CPE.},
}
TY - JOUR
AU - Dal Corso, Jacopo
AU - Preto, Nereo
AU - Agnini, Claudia
AU - Hohn, Sönke
AU - Merico, Agostino
AU - Willems, Helmut
AU - Gianolla, Piero
TI - Rise of calcispheres during the Carnian Pluvial Episode (Late Triassic)
PY - 2021
SP - 103453
VL - 200
DO - 10.1016/j.gloplacha.2021.103453
AB - It has been argued that the beginning of significant pelagic calcification could have been linked to the Carnian Pluvial Episode (CPE), a climate change in the Late Triassic (~234–232 Ma) that was marked by C-cycle disruption and global warming. Nevertheless, abundant calcareous nannofossils have been described so far only in post-CPE rocks, and therefore no conclusive hypotheses can be drawn on possible causal links with it. Here we show that in deep-water successions of the Western Tethys, Orthopithonella calcispheres interpreted as calcareous dinocysts became an important component of carbonate sedimentation from the onset of the CPE, and could constitute up to 8% of hemipelagic limestones. Before the CPE, in similar depositional environments, calcispheres are rare or absent, and never constitute a significant part of the sediment. This change in the deep-water carbonate sedimentation, is mirrored in the shallow water environments by the rise of the reefs built by Scleractinia corals. These important innovations in Earth's carbonate systems may indicate a deep modification in the ocean biogeochemistry during the CPE.
ER -
