What question did this study set out to answer?

To assess the geological and climatological impacts of Early Eocene Climatic Optimum hyperthermals on sediment transport, deposition, and hydrological regimes in continental basin settings.

June 15, 2025Sedimentary GeologyOpen Access

Abrupt changes in continental sedimentation triggered by monsoon-type event during EECO hyperthermals, Minervois Basin, Southern France

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Authors

CBCindy BoyrieCentre National de la Recherche Scientifique FGFlavia GirardUniversité de Montpellier JYJohan YansUniversity of Namur

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Implication

Stratigraphic analysis reveals abrupt detrital influxes in an Early Eocene continental basin, indicating transient hyperthermals trigger extreme monsoon-like rainfall events.

Key Points

To assess the geological and climatological impacts of Early Eocene Climatic Optimum hyperthermals on sediment transport, deposition, and hydrological regimes in continental basin settings.
Constructed a chronostratigraphic framework of the Minervois Basin succession using sedimentology, sequence stratigraphy, magnetostratigraphy, and organic carbon chemostratigraphy (δ13Corg).
Conducted sedimentary facies association analysis to delineate sequence boundaries and characterize shifting depositional environments.
Identified three continental depositional sequences dominated by floodplain to palustrine-shallow lacustrine carbonates reflecting background arid climatic conditions.
Detected sudden, cyclic pulses of detrital flux forming supercritical bedforms in braided channel plains, reflecting intense hinterland precipitation.
Correlated these coarse sediment influxes directly with negative carbon isotope excursions corresponding to hyperthermals C24n.1nH1/K (ETM3), C23rH2 (M), and C23n.2nH1–C23n.2nH2 (N–O).

Cite This Study

Boyrie et al. (2025) studied this question.

synapsesocial.com/papers/6aa8606fb3d557092126a259 https://doi.org/10.1016/j.sedgeo.2025.106923

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Implication

Stratigraphic analysis reveals abrupt detrital influxes in an Early Eocene continental basin, indicating transient hyperthermals trigger extreme monsoon-like rainfall events.

Abrupt changes in continental sedimentation triggered by monsoon-type event during EECO hyperthermals, Minervois Basin, Southern France

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Implication

Key Points

Cite This Study

Abrupt changes in continental sedimentation triggered by monsoon-type event during EECO hyperthermals, Minervois Basin, Southern France

Discussion

Member takes

Implication

Key Points

Cite This Study

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