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Gong L, Holbourn A, Kuhnt W, Opdyke B, Zhang Y, Ravelo AC, Zhang P, Xu J, Matsuzaki K, Aiello I, Beil S, Andersen N. Middle Pleistocene re-organization of Australian Monsoon. Nat Commun 2023; 14:2002. [PMID: 37037802 PMCID: PMC10086051 DOI: 10.1038/s41467-023-37639-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 03/24/2023] [Indexed: 04/12/2023] Open
Abstract
The sensitivity of the Australian Monsoon to changing climate boundary conditions remains controversial due to limited understanding of forcing processes and past variability. Here, we reconstruct austral summer monsoonal discharge and wind-driven winter productivity across the Middle Pleistocene Transition (MPT) in a sediment sequence drilled off NW Australia. We show that monsoonal precipitation and runoff primarily responded to precessional insolation forcing until ~0.95 Ma, but exhibited heightened sensitivity to ice volume and pCO2 related feedbacks following intensification of glacial-interglacial cycles. Our records further suggest that summer monsoon variability at the precessional band was closely tied to the thermal evolution of the Indo-Pacific Warm Pool and strength of the Walker circulation over the past ~1.6 Myr. By contrast, productivity proxy records consistently tracked glacial-interglacial variability, reflecting changing rhythms in polar ice fluctuations and Hadley circulation strength. We conclude that the Australian Monsoon underwent a major re-organization across the MPT and that extratropical feedbacks were instrumental in driving short- and long-term variability.
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Affiliation(s)
- Li Gong
- Institute of Geosciences, Christian-Albrechts-University, D-24118, Kiel, Germany
| | - Ann Holbourn
- Institute of Geosciences, Christian-Albrechts-University, D-24118, Kiel, Germany.
| | - Wolfgang Kuhnt
- Institute of Geosciences, Christian-Albrechts-University, D-24118, Kiel, Germany
| | - Bradley Opdyke
- Research School of Earth Sciences, Australian National University, Mills Road, Acton, ACT, 2601, Australia
| | - Yan Zhang
- Ocean Sciences Department, University of California, 1156 High Street, Santa Cruz, CA, 95064, USA
| | - Ana Christina Ravelo
- Ocean Sciences Department, University of California, 1156 High Street, Santa Cruz, CA, 95064, USA
| | - Peng Zhang
- Institute of Cenozoic Geology and Environment, State Key Laboratory of Continental Dynamics and Department of Geology, Northwest University, 710069, Xi'an, China
| | - Jian Xu
- Institute of Cenozoic Geology and Environment, State Key Laboratory of Continental Dynamics and Department of Geology, Northwest University, 710069, Xi'an, China
| | - Kenji Matsuzaki
- Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba, 277-8564, Japan
- Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Ivano Aiello
- Department of Geological Oceanography, Moss Landing Marine Laboratories, San Jose State University, Moss Landing, CA, 95039, USA
| | - Sebastian Beil
- Institute of Geosciences, Christian-Albrechts-University, D-24118, Kiel, Germany
| | - Nils Andersen
- Leibniz Laboratory for Radiometric Dating and Stable Isotope Research, Christian-Albrechts-University Kiel, D-24118, Kiel, Germany
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Jian Z, Wang Y, Dang H, Mohtadi M, Rosenthal Y, Lea DW, Liu Z, Jin H, Ye L, Kuhnt W, Wang X. Warm pool ocean heat content regulates ocean-continent moisture transport. Nature 2022; 612:92-99. [PMID: 36261525 DOI: 10.1038/s41586-022-05302-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 08/31/2022] [Indexed: 11/09/2022]
Abstract
The Indo-Pacific Warm Pool (IPWP) exerts a dominant role in global climate by releasing huge amounts of water vapour and latent heat to the atmosphere and modulating upper ocean heat content (OHC), which has been implicated in modern climate change1. The long-term variations of IPWP OHC and their effect on monsoonal hydroclimate are, however, not fully explored. Here, by combining geochemical proxies and transient climate simulations, we show that changes of IPWP upper (0-200 m) OHC over the past 360,000 years exhibit dominant precession and weaker obliquity cycles and follow changes in meridional insolation gradients, and that only 30%-40% of the deglacial increases are related to changes in ice volume. On the precessional band, higher upper OHC correlates with oxygen isotope enrichments in IPWP surface water and concomitant depletion in East Asian precipitation as recorded in Chinese speleothems. Using an isotope-enabled air-sea coupled model, we suggest that on precessional timescales, variations in IPWP upper OHC, more than surface temperature, act to amplify the ocean-continent hydrological cycle via the convergence of moisture and latent heat. From an energetic viewpoint, the coupling of upper OHC and monsoon variations, both coordinated by insolation changes on orbital timescales, is critical for regulating the global hydroclimate.
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Affiliation(s)
- Zhimin Jian
- State Key Laboratory of Marine Geology, Tongji University, Shanghai, China.
| | - Yue Wang
- State Key Laboratory of Marine Geology, Tongji University, Shanghai, China.
| | - Haowen Dang
- State Key Laboratory of Marine Geology, Tongji University, Shanghai, China.
| | - Mahyar Mohtadi
- MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
| | - Yair Rosenthal
- Department of Marine and Coastal Science, Rutgers University, New Brunswick, NJ, USA.,Department of Earth and Planetary Sciences, Rutgers University, New Brunswick, NJ, USA
| | - David W Lea
- Department of Earth Science, University of California, Santa Barbara, CA, USA
| | - Zhongfang Liu
- State Key Laboratory of Marine Geology, Tongji University, Shanghai, China
| | - Haiyan Jin
- State Key Laboratory of Marine Geology, Tongji University, Shanghai, China
| | - Liming Ye
- Second Institute of Oceanography, Ministry of Natural Resource, Hangzhou, China
| | - Wolfgang Kuhnt
- Institute of Geosciences, Christian-Albrechts-Universität, Kiel, Germany
| | - Xingxing Wang
- State Key Laboratory of Marine Geology, Tongji University, Shanghai, China
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3
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Ao H, Rohling EJ, Zhang R, Roberts AP, Holbourn AE, Ladant JB, Dupont-Nivet G, Kuhnt W, Zhang P, Wu F, Dekkers MJ, Liu Q, Liu Z, Xu Y, Poulsen CJ, Licht A, Sun Q, Chiang JCH, Liu X, Wu G, Ma C, Zhou W, Jin Z, Li X, Li X, Peng X, Qiang X, An Z. Global warming-induced Asian hydrological climate transition across the Miocene-Pliocene boundary. Nat Commun 2021; 12:6935. [PMID: 34836960 PMCID: PMC8626456 DOI: 10.1038/s41467-021-27054-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 11/02/2021] [Indexed: 12/02/2022] Open
Abstract
Across the Miocene-Pliocene boundary (MPB; 5.3 million years ago, Ma), late Miocene cooling gave way to the early-to-middle Pliocene Warm Period. This transition, across which atmospheric CO2 concentrations increased to levels similar to present, holds potential for deciphering regional climate responses in Asia-currently home to more than half of the world's population- to global climate change. Here we find that CO2-induced MPB warming both increased summer monsoon moisture transport over East Asia, and enhanced aridification over large parts of Central Asia by increasing evaporation, based on integration of our ~1-2-thousand-year (kyr) resolution summer monsoon records from the Chinese Loess Plateau aeolian red clay with existing terrestrial records, land-sea correlations, and climate model simulations. Our results offer palaeoclimate-based support for 'wet-gets-wetter and dry-gets-drier' projections of future regional hydroclimate responses to sustained anthropogenic forcing. Moreover, our high-resolution monsoon records reveal a dynamic response to eccentricity modulation of solar insolation, with predominant 405-kyr and ~100-kyr periodicities between 8.1 and 3.4 Ma.
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Affiliation(s)
- Hong Ao
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China.
- Open Studio for Oceanic-Continental Climate and Environment Changes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China.
| | - Eelco J Rohling
- Research School of Earth Sciences, Australian National University, Canberra, ACT, Australia
- Ocean and Earth Science, University of Southampton, National Oceanography Centre, Southampton, UK
| | - Ran Zhang
- Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China.
| | - Andrew P Roberts
- Research School of Earth Sciences, Australian National University, Canberra, ACT, Australia
| | - Ann E Holbourn
- Institute of Geosciences, Christian-Albrechts-University, Kiel, Germany
| | - Jean-Baptiste Ladant
- Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI, USA
- Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191, Gif-sur-Yvette, France
| | - Guillaume Dupont-Nivet
- Géosciences Rennes, UMR-CNRS 6118, University Rennes, Rennes, France
- Department of Geosciences, Potsdam University, Potsdam, Germany
| | - Wolfgang Kuhnt
- Institute of Geosciences, Christian-Albrechts-University, Kiel, Germany
| | - Peng Zhang
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China
- Open Studio for Oceanic-Continental Climate and Environment Changes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Feng Wu
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China
| | - Mark J Dekkers
- Paleomagnetic Laboratory 'Fort Hoofddijk', Department of Earth Sciences, Faculty of Geosciences, Utrecht University, Utrecht, The Netherlands
| | - Qingsong Liu
- Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Zhonghui Liu
- Department of Earth Sciences, University of Hong Kong, Hong Kong, China
| | - Yong Xu
- Xi'an Center of Geological Survey, China Geological Survey, Xi'an, China
| | - Christopher J Poulsen
- Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI, USA
| | - Alexis Licht
- Department of Earth and Space Sciences, University of Washington, Seattle, WA, USA
| | - Qiang Sun
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an, China
| | - John C H Chiang
- Department of Geography, University of California, Berkeley, CA, USA
| | - Xiaodong Liu
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China
| | - Guoxiong Wu
- Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
| | - Chao Ma
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu Universityof Technology, Chengdu, China
| | - Weijian Zhou
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China
- Open Studio for Oceanic-Continental Climate and Environment Changes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Zhangdong Jin
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China
- Open Studio for Oceanic-Continental Climate and Environment Changes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Xinxia Li
- School of Earth Sciences, China University of Geosciences (Wuhan), Wuhan, China
| | - Xinzhou Li
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China
| | - Xianzhe Peng
- School of Information Management, Nanjing University, Nanjing, China
| | - Xiaoke Qiang
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China
| | - Zhisheng An
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China
- Open Studio for Oceanic-Continental Climate and Environment Changes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
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Dang H, Jian Z, Wang Y, Mohtadi M, Rosenthal Y, Ye L, Bassinot F, Kuhnt W. Pacific warm pool subsurface heat sequestration modulated Walker circulation and ENSO activity during the Holocene. Sci Adv 2020; 6:6/42/eabc0402. [PMID: 33055161 PMCID: PMC7556771 DOI: 10.1126/sciadv.abc0402] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 08/25/2020] [Indexed: 06/11/2023]
Abstract
Dynamics driving the El Niño-Southern Oscillation (ENSO) over longer-than-interannual time scales are poorly understood. Here, we compile thermocline temperature records of the Indo-Pacific warm pool over the past 25,000 years, which reveal a major warming in the Early Holocene and a secondary warming in the Middle Holocene. We suggest that the first thermocline warming corresponds to heat transport of southern Pacific shallow overturning circulation driven by June (austral winter) insolation maximum. The second thermocline warming follows equatorial September insolation maximum, which may have caused a steeper west-east upper-ocean thermal gradient and an intensified Walker circulation in the equatorial Pacific. We propose that the warm pool thermocline warming ultimately reduced the interannual ENSO activity in the Early to Middle Holocene. Thus, a substantially increased oceanic heat content of the warm pool, acting as a negative feedback for ENSO in the past, may play its role in the ongoing global warming.
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Affiliation(s)
- Haowen Dang
- State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
| | - Zhimin Jian
- State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China.
| | - Yue Wang
- State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
| | - Mahyar Mohtadi
- MARUM-Center for Marine Environmental Sciences, University of Bremen, 28359 Bremen, Germany
| | - Yair Rosenthal
- Department of Marine and Coastal Science and Department of Earth and Planetary Sciences, Rutgers University, New Brunswick, NJ 08901, USA
| | - Liming Ye
- Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, Ministry of Natural Resources of China, Hangzhou 310012, China
| | - Franck Bassinot
- Laboratoire des Sciences du Climat et de l'Environnement/IPSL, CEA-CNRS-UVSQ, University Paris-Saclay, 91198 Gif-sur-Yvette, France
| | - Wolfgang Kuhnt
- Institute of Geosciences, Christian-Albrechts-University, D-24118 Kiel, Germany
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Holbourn AE, Kuhnt W, Clemens SC, Kochhann KGD, Jöhnck J, Lübbers J, Andersen N. Late Miocene climate cooling and intensification of southeast Asian winter monsoon. Nat Commun 2018; 9:1584. [PMID: 29679005 PMCID: PMC5910391 DOI: 10.1038/s41467-018-03950-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 03/23/2018] [Indexed: 11/09/2022] Open
Abstract
The late Miocene offers the opportunity to assess the sensitivity of the Earth's climate to orbital forcing and to changing boundary conditions, such as ice volume and greenhouse gas concentrations, on a warmer-than-modern Earth. Here we investigate the relationships between low- and high-latitude climate variability in an extended succession from the subtropical northwestern Pacific Ocean. Our high-resolution benthic isotope record in combination with paired mixed layer isotope and Mg/Ca-derived temperature data reveal that a long-term cooling trend was synchronous with intensification of the Asian winter monsoon and strengthening of the biological pump from ~7 Ma until ~5.5 Ma. The climate shift occurred at the end of a global δ13C decrease, suggesting that changes in the carbon cycle involving the terrestrial and deep ocean carbon reservoirs were instrumental in driving late Miocene climate cooling. The inception of cooler climate conditions culminated with ephemeral Northern Hemisphere glaciations between 6.0 and 5.5 Ma.
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Affiliation(s)
- Ann E Holbourn
- Institute of Geosciences, Christian-Albrechts-University, Kiel, D-24118, Germany.
| | - Wolfgang Kuhnt
- Institute of Geosciences, Christian-Albrechts-University, Kiel, D-24118, Germany
| | - Steven C Clemens
- Earth, Environmental and Planetary Sciences, Brown University, Box 1846, Providence, RI, 02912, USA
| | - Karlos G D Kochhann
- Institute of Geosciences, Christian-Albrechts-University, Kiel, D-24118, Germany.,Technological Institute of Micropaleontology, Unisinos University, São Leopoldo, 93022-750, Brazil
| | - Janika Jöhnck
- Institute of Geosciences, Christian-Albrechts-University, Kiel, D-24118, Germany
| | - Julia Lübbers
- Institute of Geosciences, Christian-Albrechts-University, Kiel, D-24118, Germany
| | - Nils Andersen
- Leibniz Laboratory for Radiometric Dating and Stable Isotope Research, Christian-Albrechts-University, Kiel, D-24118, Germany
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Holbourn A, Kuhnt W, Schulz M, Erlenkeuser H. Impacts of orbital forcing and atmospheric carbon dioxide on Miocene ice-sheet expansion. Nature 2005; 438:483-7. [PMID: 16306989 DOI: 10.1038/nature04123] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2005] [Accepted: 08/04/2005] [Indexed: 11/08/2022]
Abstract
The processes causing the middle Miocene global cooling, which marked the Earth's final transition into an 'icehouse' climate about 13.9 million years ago (Myr ago), remain enigmatic. Tectonically driven circulation changes and variations in atmospheric carbon dioxide levels have been suggested as driving mechanisms, but the lack of adequately preserved sedimentary successions has made rigorous testing of these hypotheses difficult. Here we present high-resolution climate proxy records, covering the period from 14.7 to 12.7 million years ago, from two complete sediment cores from the northwest and southeast subtropical Pacific Ocean. Using new chronologies through the correlation to the latest orbital model, we find relatively constant, low summer insolation over Antarctica coincident with declining atmospheric carbon dioxide levels at the time of Antarctic ice-sheet expansion and global cooling, suggesting a causal link. We surmise that the thermal isolation of Antarctica played a role in providing sustained long-term climatic boundary conditions propitious for ice-sheet formation. Our data document that Antarctic glaciation was rapid, taking place within two obliquity cycles, and coincided with a striking transition from obliquity to eccentricity as the drivers of climatic change.
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Affiliation(s)
- Ann Holbourn
- Institute of Geosciences, Christian-Albrechts-University, D-24118 Kiel, Germany.
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Kuhnt W, Holbourn A, Hall R, Zuvela M, Käse R. Neogene history of the Indonesian Throughflow. Continent-Ocean Interactions Within East Asian Marginal Seas 2004. [DOI: 10.1029/149gm16] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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Kuhnt W, Chellai EH, Holbourn A, Luderer F, Thurow J, Wagner T, Albani AE, Beckmann B, Herbin JP, Kawamura H, Kolonic S, Nederbragt S, Street C, Ravilious K. Morocco Basin's sedimentary record may provide correlations for Cretaceous paleoceanographic events worldwide. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/01eo00223] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Kuhnt W, Urquhart E. Tethyan flysch-type benthic foraminiferal assemblages in the North Atlantic: cretaceous to Palaeogene deep water agglutinated foraminifers from the Iberia abyssal plain (ODP Leg 173). ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s0035-1598(01)90074-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kuhnt W, Moullade M, Masse JP, Erlenkeuser H. Carbon isotope stratigraphy of the lower Aptian historical stratotype at Cassis-La Bédoule (SE France). ACTA ACUST UNITED AC 1998. [DOI: 10.3406/geolm.1998.1625] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Moullade M, Masse JP, Tronchetti G, Kuhnt W, Ropolo P, Bergen JA, Masure E, Renard M. Le stratotype historique de l'Aptien inférieur (région de Cassis-La Bédoule) : synthèse stratigraphique. ACTA ACUST UNITED AC 1998. [DOI: 10.3406/geolm.1998.1641] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kuhnt W, Kaminski MA, Moullade M. Late Cretaceous deep-water agglutinated foraminiferal assemblages from the North Atlantic and its marginal seas. ACTA ACUST UNITED AC 1989. [DOI: 10.1007/bf01829336] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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