Middle Eocene Climatic Optimum (MECO) and its imprint in the continental Escanilla Formation, Spain
-
Published:2024-04-15
Issue:4
Volume:20
Page:935-949
-
ISSN:1814-9332
-
Container-title:Climate of the Past
-
language:en
-
Short-container-title:Clim. Past
Author:
Sharma NikhilORCID, Spangenberg Jorge E.ORCID, Adatte ThierryORCID, Vennemann Torsten, Kocsis László, Vérité JeanORCID, Valero LuisORCID, Castelltort SébastienORCID
Abstract
Abstract. The Middle Eocene Climatic Optimum (MECO) is a global warming event mainly recognized in the marine domain and described less in the terrestrial environment. Here we present a comprehensive geochemical record of the MECO from the Escanilla Formation, a fluvial sedimentary succession in the southern Pyrenees, Spain, based on a suite of sampled paleosols, fluvial stromatolites, and pedogenic nodules. Our multiproxy approach involves using carbon and oxygen stable isotope compositions to identify the regional preservation of the MECO, calculate chemical weathering intensity and mean annual precipitation, perform clumped isotopes on carbonates, and identify clay mineralogy assemblages of paleosols. Results indicate that the Middle Eocene interval in the southern Pyrenees was characterized by low weathering rates under warm and arid climatic conditions. This is further supported by the presence of smectite, palygorskite, illite, and chlorite, which suggest seasonal rainfall but under generally dry conditions resulting in weak chemical weathering. Importantly, a negative organic carbon isotopic excursion indicates the regional, terrestrial impact of the MECO, highlighting that fluvial sedimentary successions even in active foreland basins can represent particularly interesting terrestrial archives of past changes in global climate.
Funder
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Publisher
Copernicus GmbH
Reference74 articles.
1. Adatte, T., Stinnesbeck, W., and Keller, G.: Lithostratigraphic and mineralogic correlations of near K/T boundary clastic sediments in northeastern Mexico: implications for origin and nature of deposition, Spec. Pap. Geol. Soc. Am., 307, 211–226, 1996. 2. Anderson, N. T., Kelson, J. R., Kele, S., Daëron, M., Bonifacie, M., Horita, J., Mackey, T. J., John, C. M., Kluge, T., Petschnig, P., Jost, A. B., Huntington, K. W., Bernasconi, S. M., and Bergmann, K. D.: A Unified clumped isotope thermometer calibration (0.5–1,100 °C) using carbonate-based standardization, Geophys. Res. Lett., 48, e2020GL092069, https://doi.org/10.1029/2020gl092069, 2021. 3. Awramik, S. M. and Buchheim, H. P.: Giant stromatolites of the Eocene Green River Formation (Colorado, USA), Geology, 43, 691–694, https://doi.org/10.1130/g36793.1, 2015. 4. Barefoot, E. A., Nittrouer, J. A., Foreman, B. Z., Hajek, E. A., Dickens, G. R., Baisden, T., and Toms, L.: Evidence for enhanced fluvial channel mobility and fine sediment export due to precipitation seasonality during the Paleocene-Eocene thermal maximum, Geology, 50, 116–120, https://doi.org/10.1130/g49149.1, 2021. 5. Behar, F., Beaumont, V., and Penteado, H. L. D. B.: Rock-Eval 6 Technology: Performances and Developments, Oil Gas Sci. Technology, 56, 111–134, https://doi.org/10.2516/ogst:2001013, 2001.
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|