Late Neogene evolution of the Peruvian margin and its ecosystems: a synthesis from the Sacaco record
Abstract The highly productive waters of the Humboldt Current System (HCS) host a particular temperate ecosystem within the tropics, whose history is still largely unknown. The Pisco Formation, deposited during Mio-Pliocene times in the Peruvian continental margin has yielded an outstanding collecti...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Ochoa, Diana [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2021 |
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| Schlagwörter: |
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| Anmerkung: |
© The Author(s) 2021. corrected publication 2021 |
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| Übergeordnetes Werk: |
Enthalten in: Geologische Rundschau - Berlin : Springer, 1910, 110(2021), 3 vom: 09. März, Seite 995-1025 |
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| Übergeordnetes Werk: |
volume:110 ; year:2021 ; number:3 ; day:09 ; month:03 ; pages:995-1025 |
| Links: |
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| DOI / URN: |
10.1007/s00531-021-02003-1 |
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| Katalog-ID: |
SPR043915914 |
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| 520 | |a Abstract The highly productive waters of the Humboldt Current System (HCS) host a particular temperate ecosystem within the tropics, whose history is still largely unknown. The Pisco Formation, deposited during Mio-Pliocene times in the Peruvian continental margin has yielded an outstanding collection of coastal-marine fossils, providing an opportunity to understand the genesis of the HCS ecosystem. We present a comprehensive review, completed with new results, that integrates geological and paleontological data from the last 10 My, especially focusing on the southern East Pisco Basin (Sacaco area). We discuss the depositional settings of the Pisco Formation and integrate new U/Pb radiometric ages into the chronostratigraphic framework of the Sacaco sub-basin. The last preserved Pisco sediments at Sacaco were deposited ~ 4.5 Ma, while the overlying Caracoles Formation accumulated from ~ 2.7 Ma onwards. We identified a Pliocene angular unconformity encompassing 1.7 My between these formations, associated with a regional phase of uplift. Local and regional paleoenvironmental indicators suggest that shallow settings influenced by the offshore upwelling of ventilated and warm waters prevailed until the early Pliocene. We present an extensive synthesis of the late Miocene–Pleistocene vertebrate fossil record, which allows for an ecological characterization of the coastal-marine communities, an assessment of biodiversity trends, and changes in coastal-marine lineages in relation to modern HCS faunas. Our synthesis shows that: (i) typical endemic coastal Pisco vertebrates persisted up to ~ 4.5 Ma, (ii) first modern HCS toothed cetaceans appear at ~ 7–6 Ma, coinciding with a decline in genus diversity, and (iii) a vertebrate community closer to the current HCS was only reached after 2.7 Ma. The genesis of the Peruvian coastal ecosystem seems to be driven by a combination of stepwise transformations of the coastal geomorphology related to local tectonic pulses and by a global cooling trend leading to the modern oceanic circulation system. | ||
| 650 | 4 | |a Pisco Basin |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Sacaco |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Mio-Pliocene transition |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Humboldt current system |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Faunal turnover |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Biodiversity |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Salas-Gismondi, Rodolfo |4 aut | |
| 700 | 1 | |a DeVries, Thomas J. |4 aut | |
| 700 | 1 | |a Baby, Patrice |4 aut | |
| 700 | 1 | |a de Muizon, Christian |4 aut | |
| 700 | 1 | |a Altamirano, Alí |4 aut | |
| 700 | 1 | |a Barbosa-Espitia, Angel |4 aut | |
| 700 | 1 | |a Foster, David A. |4 aut | |
| 700 | 1 | |a Quispe, Kelly |4 aut | |
| 700 | 1 | |a Cardich, Jorge |4 aut | |
| 700 | 1 | |a Gutiérrez, Dimitri |4 aut | |
| 700 | 1 | |a Perez, Alexander |4 aut | |
| 700 | 1 | |a Valqui, Juan |4 aut | |
| 700 | 1 | |a Urbina, Mario |4 aut | |
| 700 | 1 | |a Carré, Matthieu |0 (orcid)0000-0001-8178-7316 |4 aut | |
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10.1007/s00531-021-02003-1 doi (DE-627)SPR043915914 (SPR)s00531-021-02003-1-e DE-627 ger DE-627 rakwb eng Ochoa, Diana verfasserin (orcid)0000-0001-6242-4202 aut Late Neogene evolution of the Peruvian margin and its ecosystems: a synthesis from the Sacaco record 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2021. corrected publication 2021 Abstract The highly productive waters of the Humboldt Current System (HCS) host a particular temperate ecosystem within the tropics, whose history is still largely unknown. The Pisco Formation, deposited during Mio-Pliocene times in the Peruvian continental margin has yielded an outstanding collection of coastal-marine fossils, providing an opportunity to understand the genesis of the HCS ecosystem. We present a comprehensive review, completed with new results, that integrates geological and paleontological data from the last 10 My, especially focusing on the southern East Pisco Basin (Sacaco area). We discuss the depositional settings of the Pisco Formation and integrate new U/Pb radiometric ages into the chronostratigraphic framework of the Sacaco sub-basin. The last preserved Pisco sediments at Sacaco were deposited ~ 4.5 Ma, while the overlying Caracoles Formation accumulated from ~ 2.7 Ma onwards. We identified a Pliocene angular unconformity encompassing 1.7 My between these formations, associated with a regional phase of uplift. Local and regional paleoenvironmental indicators suggest that shallow settings influenced by the offshore upwelling of ventilated and warm waters prevailed until the early Pliocene. We present an extensive synthesis of the late Miocene–Pleistocene vertebrate fossil record, which allows for an ecological characterization of the coastal-marine communities, an assessment of biodiversity trends, and changes in coastal-marine lineages in relation to modern HCS faunas. Our synthesis shows that: (i) typical endemic coastal Pisco vertebrates persisted up to ~ 4.5 Ma, (ii) first modern HCS toothed cetaceans appear at ~ 7–6 Ma, coinciding with a decline in genus diversity, and (iii) a vertebrate community closer to the current HCS was only reached after 2.7 Ma. The genesis of the Peruvian coastal ecosystem seems to be driven by a combination of stepwise transformations of the coastal geomorphology related to local tectonic pulses and by a global cooling trend leading to the modern oceanic circulation system. Pisco Basin (dpeaa)DE-He213 Sacaco (dpeaa)DE-He213 Mio-Pliocene transition (dpeaa)DE-He213 Humboldt current system (dpeaa)DE-He213 Faunal turnover (dpeaa)DE-He213 Biodiversity (dpeaa)DE-He213 Salas-Gismondi, Rodolfo aut DeVries, Thomas J. aut Baby, Patrice aut de Muizon, Christian aut Altamirano, Alí aut Barbosa-Espitia, Angel aut Foster, David A. aut Quispe, Kelly aut Cardich, Jorge aut Gutiérrez, Dimitri aut Perez, Alexander aut Valqui, Juan aut Urbina, Mario aut Carré, Matthieu (orcid)0000-0001-8178-7316 aut Enthalten in Geologische Rundschau Berlin : Springer, 1910 110(2021), 3 vom: 09. März, Seite 995-1025 (DE-627)47265019X (DE-600)2168407-8 1432-1149 nnns volume:110 year:2021 number:3 day:09 month:03 pages:995-1025 https://dx.doi.org/10.1007/s00531-021-02003-1 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_647 GBV_ILN_702 AR 110 2021 3 09 03 995-1025 |
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10.1007/s00531-021-02003-1 doi (DE-627)SPR043915914 (SPR)s00531-021-02003-1-e DE-627 ger DE-627 rakwb eng Ochoa, Diana verfasserin (orcid)0000-0001-6242-4202 aut Late Neogene evolution of the Peruvian margin and its ecosystems: a synthesis from the Sacaco record 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2021. corrected publication 2021 Abstract The highly productive waters of the Humboldt Current System (HCS) host a particular temperate ecosystem within the tropics, whose history is still largely unknown. The Pisco Formation, deposited during Mio-Pliocene times in the Peruvian continental margin has yielded an outstanding collection of coastal-marine fossils, providing an opportunity to understand the genesis of the HCS ecosystem. We present a comprehensive review, completed with new results, that integrates geological and paleontological data from the last 10 My, especially focusing on the southern East Pisco Basin (Sacaco area). We discuss the depositional settings of the Pisco Formation and integrate new U/Pb radiometric ages into the chronostratigraphic framework of the Sacaco sub-basin. The last preserved Pisco sediments at Sacaco were deposited ~ 4.5 Ma, while the overlying Caracoles Formation accumulated from ~ 2.7 Ma onwards. We identified a Pliocene angular unconformity encompassing 1.7 My between these formations, associated with a regional phase of uplift. Local and regional paleoenvironmental indicators suggest that shallow settings influenced by the offshore upwelling of ventilated and warm waters prevailed until the early Pliocene. We present an extensive synthesis of the late Miocene–Pleistocene vertebrate fossil record, which allows for an ecological characterization of the coastal-marine communities, an assessment of biodiversity trends, and changes in coastal-marine lineages in relation to modern HCS faunas. Our synthesis shows that: (i) typical endemic coastal Pisco vertebrates persisted up to ~ 4.5 Ma, (ii) first modern HCS toothed cetaceans appear at ~ 7–6 Ma, coinciding with a decline in genus diversity, and (iii) a vertebrate community closer to the current HCS was only reached after 2.7 Ma. The genesis of the Peruvian coastal ecosystem seems to be driven by a combination of stepwise transformations of the coastal geomorphology related to local tectonic pulses and by a global cooling trend leading to the modern oceanic circulation system. Pisco Basin (dpeaa)DE-He213 Sacaco (dpeaa)DE-He213 Mio-Pliocene transition (dpeaa)DE-He213 Humboldt current system (dpeaa)DE-He213 Faunal turnover (dpeaa)DE-He213 Biodiversity (dpeaa)DE-He213 Salas-Gismondi, Rodolfo aut DeVries, Thomas J. aut Baby, Patrice aut de Muizon, Christian aut Altamirano, Alí aut Barbosa-Espitia, Angel aut Foster, David A. aut Quispe, Kelly aut Cardich, Jorge aut Gutiérrez, Dimitri aut Perez, Alexander aut Valqui, Juan aut Urbina, Mario aut Carré, Matthieu (orcid)0000-0001-8178-7316 aut Enthalten in Geologische Rundschau Berlin : Springer, 1910 110(2021), 3 vom: 09. März, Seite 995-1025 (DE-627)47265019X (DE-600)2168407-8 1432-1149 nnns volume:110 year:2021 number:3 day:09 month:03 pages:995-1025 https://dx.doi.org/10.1007/s00531-021-02003-1 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_647 GBV_ILN_702 AR 110 2021 3 09 03 995-1025 |
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10.1007/s00531-021-02003-1 doi (DE-627)SPR043915914 (SPR)s00531-021-02003-1-e DE-627 ger DE-627 rakwb eng Ochoa, Diana verfasserin (orcid)0000-0001-6242-4202 aut Late Neogene evolution of the Peruvian margin and its ecosystems: a synthesis from the Sacaco record 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2021. corrected publication 2021 Abstract The highly productive waters of the Humboldt Current System (HCS) host a particular temperate ecosystem within the tropics, whose history is still largely unknown. The Pisco Formation, deposited during Mio-Pliocene times in the Peruvian continental margin has yielded an outstanding collection of coastal-marine fossils, providing an opportunity to understand the genesis of the HCS ecosystem. We present a comprehensive review, completed with new results, that integrates geological and paleontological data from the last 10 My, especially focusing on the southern East Pisco Basin (Sacaco area). We discuss the depositional settings of the Pisco Formation and integrate new U/Pb radiometric ages into the chronostratigraphic framework of the Sacaco sub-basin. The last preserved Pisco sediments at Sacaco were deposited ~ 4.5 Ma, while the overlying Caracoles Formation accumulated from ~ 2.7 Ma onwards. We identified a Pliocene angular unconformity encompassing 1.7 My between these formations, associated with a regional phase of uplift. Local and regional paleoenvironmental indicators suggest that shallow settings influenced by the offshore upwelling of ventilated and warm waters prevailed until the early Pliocene. We present an extensive synthesis of the late Miocene–Pleistocene vertebrate fossil record, which allows for an ecological characterization of the coastal-marine communities, an assessment of biodiversity trends, and changes in coastal-marine lineages in relation to modern HCS faunas. Our synthesis shows that: (i) typical endemic coastal Pisco vertebrates persisted up to ~ 4.5 Ma, (ii) first modern HCS toothed cetaceans appear at ~ 7–6 Ma, coinciding with a decline in genus diversity, and (iii) a vertebrate community closer to the current HCS was only reached after 2.7 Ma. The genesis of the Peruvian coastal ecosystem seems to be driven by a combination of stepwise transformations of the coastal geomorphology related to local tectonic pulses and by a global cooling trend leading to the modern oceanic circulation system. Pisco Basin (dpeaa)DE-He213 Sacaco (dpeaa)DE-He213 Mio-Pliocene transition (dpeaa)DE-He213 Humboldt current system (dpeaa)DE-He213 Faunal turnover (dpeaa)DE-He213 Biodiversity (dpeaa)DE-He213 Salas-Gismondi, Rodolfo aut DeVries, Thomas J. aut Baby, Patrice aut de Muizon, Christian aut Altamirano, Alí aut Barbosa-Espitia, Angel aut Foster, David A. aut Quispe, Kelly aut Cardich, Jorge aut Gutiérrez, Dimitri aut Perez, Alexander aut Valqui, Juan aut Urbina, Mario aut Carré, Matthieu (orcid)0000-0001-8178-7316 aut Enthalten in Geologische Rundschau Berlin : Springer, 1910 110(2021), 3 vom: 09. März, Seite 995-1025 (DE-627)47265019X (DE-600)2168407-8 1432-1149 nnns volume:110 year:2021 number:3 day:09 month:03 pages:995-1025 https://dx.doi.org/10.1007/s00531-021-02003-1 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_647 GBV_ILN_702 AR 110 2021 3 09 03 995-1025 |
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10.1007/s00531-021-02003-1 doi (DE-627)SPR043915914 (SPR)s00531-021-02003-1-e DE-627 ger DE-627 rakwb eng Ochoa, Diana verfasserin (orcid)0000-0001-6242-4202 aut Late Neogene evolution of the Peruvian margin and its ecosystems: a synthesis from the Sacaco record 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2021. corrected publication 2021 Abstract The highly productive waters of the Humboldt Current System (HCS) host a particular temperate ecosystem within the tropics, whose history is still largely unknown. The Pisco Formation, deposited during Mio-Pliocene times in the Peruvian continental margin has yielded an outstanding collection of coastal-marine fossils, providing an opportunity to understand the genesis of the HCS ecosystem. We present a comprehensive review, completed with new results, that integrates geological and paleontological data from the last 10 My, especially focusing on the southern East Pisco Basin (Sacaco area). We discuss the depositional settings of the Pisco Formation and integrate new U/Pb radiometric ages into the chronostratigraphic framework of the Sacaco sub-basin. The last preserved Pisco sediments at Sacaco were deposited ~ 4.5 Ma, while the overlying Caracoles Formation accumulated from ~ 2.7 Ma onwards. We identified a Pliocene angular unconformity encompassing 1.7 My between these formations, associated with a regional phase of uplift. Local and regional paleoenvironmental indicators suggest that shallow settings influenced by the offshore upwelling of ventilated and warm waters prevailed until the early Pliocene. We present an extensive synthesis of the late Miocene–Pleistocene vertebrate fossil record, which allows for an ecological characterization of the coastal-marine communities, an assessment of biodiversity trends, and changes in coastal-marine lineages in relation to modern HCS faunas. Our synthesis shows that: (i) typical endemic coastal Pisco vertebrates persisted up to ~ 4.5 Ma, (ii) first modern HCS toothed cetaceans appear at ~ 7–6 Ma, coinciding with a decline in genus diversity, and (iii) a vertebrate community closer to the current HCS was only reached after 2.7 Ma. The genesis of the Peruvian coastal ecosystem seems to be driven by a combination of stepwise transformations of the coastal geomorphology related to local tectonic pulses and by a global cooling trend leading to the modern oceanic circulation system. Pisco Basin (dpeaa)DE-He213 Sacaco (dpeaa)DE-He213 Mio-Pliocene transition (dpeaa)DE-He213 Humboldt current system (dpeaa)DE-He213 Faunal turnover (dpeaa)DE-He213 Biodiversity (dpeaa)DE-He213 Salas-Gismondi, Rodolfo aut DeVries, Thomas J. aut Baby, Patrice aut de Muizon, Christian aut Altamirano, Alí aut Barbosa-Espitia, Angel aut Foster, David A. aut Quispe, Kelly aut Cardich, Jorge aut Gutiérrez, Dimitri aut Perez, Alexander aut Valqui, Juan aut Urbina, Mario aut Carré, Matthieu (orcid)0000-0001-8178-7316 aut Enthalten in Geologische Rundschau Berlin : Springer, 1910 110(2021), 3 vom: 09. März, Seite 995-1025 (DE-627)47265019X (DE-600)2168407-8 1432-1149 nnns volume:110 year:2021 number:3 day:09 month:03 pages:995-1025 https://dx.doi.org/10.1007/s00531-021-02003-1 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_647 GBV_ILN_702 AR 110 2021 3 09 03 995-1025 |
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10.1007/s00531-021-02003-1 doi (DE-627)SPR043915914 (SPR)s00531-021-02003-1-e DE-627 ger DE-627 rakwb eng Ochoa, Diana verfasserin (orcid)0000-0001-6242-4202 aut Late Neogene evolution of the Peruvian margin and its ecosystems: a synthesis from the Sacaco record 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2021. corrected publication 2021 Abstract The highly productive waters of the Humboldt Current System (HCS) host a particular temperate ecosystem within the tropics, whose history is still largely unknown. The Pisco Formation, deposited during Mio-Pliocene times in the Peruvian continental margin has yielded an outstanding collection of coastal-marine fossils, providing an opportunity to understand the genesis of the HCS ecosystem. We present a comprehensive review, completed with new results, that integrates geological and paleontological data from the last 10 My, especially focusing on the southern East Pisco Basin (Sacaco area). We discuss the depositional settings of the Pisco Formation and integrate new U/Pb radiometric ages into the chronostratigraphic framework of the Sacaco sub-basin. The last preserved Pisco sediments at Sacaco were deposited ~ 4.5 Ma, while the overlying Caracoles Formation accumulated from ~ 2.7 Ma onwards. We identified a Pliocene angular unconformity encompassing 1.7 My between these formations, associated with a regional phase of uplift. Local and regional paleoenvironmental indicators suggest that shallow settings influenced by the offshore upwelling of ventilated and warm waters prevailed until the early Pliocene. We present an extensive synthesis of the late Miocene–Pleistocene vertebrate fossil record, which allows for an ecological characterization of the coastal-marine communities, an assessment of biodiversity trends, and changes in coastal-marine lineages in relation to modern HCS faunas. Our synthesis shows that: (i) typical endemic coastal Pisco vertebrates persisted up to ~ 4.5 Ma, (ii) first modern HCS toothed cetaceans appear at ~ 7–6 Ma, coinciding with a decline in genus diversity, and (iii) a vertebrate community closer to the current HCS was only reached after 2.7 Ma. The genesis of the Peruvian coastal ecosystem seems to be driven by a combination of stepwise transformations of the coastal geomorphology related to local tectonic pulses and by a global cooling trend leading to the modern oceanic circulation system. Pisco Basin (dpeaa)DE-He213 Sacaco (dpeaa)DE-He213 Mio-Pliocene transition (dpeaa)DE-He213 Humboldt current system (dpeaa)DE-He213 Faunal turnover (dpeaa)DE-He213 Biodiversity (dpeaa)DE-He213 Salas-Gismondi, Rodolfo aut DeVries, Thomas J. aut Baby, Patrice aut de Muizon, Christian aut Altamirano, Alí aut Barbosa-Espitia, Angel aut Foster, David A. aut Quispe, Kelly aut Cardich, Jorge aut Gutiérrez, Dimitri aut Perez, Alexander aut Valqui, Juan aut Urbina, Mario aut Carré, Matthieu (orcid)0000-0001-8178-7316 aut Enthalten in Geologische Rundschau Berlin : Springer, 1910 110(2021), 3 vom: 09. März, Seite 995-1025 (DE-627)47265019X (DE-600)2168407-8 1432-1149 nnns volume:110 year:2021 number:3 day:09 month:03 pages:995-1025 https://dx.doi.org/10.1007/s00531-021-02003-1 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_647 GBV_ILN_702 AR 110 2021 3 09 03 995-1025 |
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Late Neogene evolution of the Peruvian margin and its ecosystems: a synthesis from the Sacaco record |
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Abstract The highly productive waters of the Humboldt Current System (HCS) host a particular temperate ecosystem within the tropics, whose history is still largely unknown. The Pisco Formation, deposited during Mio-Pliocene times in the Peruvian continental margin has yielded an outstanding collection of coastal-marine fossils, providing an opportunity to understand the genesis of the HCS ecosystem. We present a comprehensive review, completed with new results, that integrates geological and paleontological data from the last 10 My, especially focusing on the southern East Pisco Basin (Sacaco area). We discuss the depositional settings of the Pisco Formation and integrate new U/Pb radiometric ages into the chronostratigraphic framework of the Sacaco sub-basin. The last preserved Pisco sediments at Sacaco were deposited ~ 4.5 Ma, while the overlying Caracoles Formation accumulated from ~ 2.7 Ma onwards. We identified a Pliocene angular unconformity encompassing 1.7 My between these formations, associated with a regional phase of uplift. Local and regional paleoenvironmental indicators suggest that shallow settings influenced by the offshore upwelling of ventilated and warm waters prevailed until the early Pliocene. We present an extensive synthesis of the late Miocene–Pleistocene vertebrate fossil record, which allows for an ecological characterization of the coastal-marine communities, an assessment of biodiversity trends, and changes in coastal-marine lineages in relation to modern HCS faunas. Our synthesis shows that: (i) typical endemic coastal Pisco vertebrates persisted up to ~ 4.5 Ma, (ii) first modern HCS toothed cetaceans appear at ~ 7–6 Ma, coinciding with a decline in genus diversity, and (iii) a vertebrate community closer to the current HCS was only reached after 2.7 Ma. The genesis of the Peruvian coastal ecosystem seems to be driven by a combination of stepwise transformations of the coastal geomorphology related to local tectonic pulses and by a global cooling trend leading to the modern oceanic circulation system. © The Author(s) 2021. corrected publication 2021 |
| abstractGer |
Abstract The highly productive waters of the Humboldt Current System (HCS) host a particular temperate ecosystem within the tropics, whose history is still largely unknown. The Pisco Formation, deposited during Mio-Pliocene times in the Peruvian continental margin has yielded an outstanding collection of coastal-marine fossils, providing an opportunity to understand the genesis of the HCS ecosystem. We present a comprehensive review, completed with new results, that integrates geological and paleontological data from the last 10 My, especially focusing on the southern East Pisco Basin (Sacaco area). We discuss the depositional settings of the Pisco Formation and integrate new U/Pb radiometric ages into the chronostratigraphic framework of the Sacaco sub-basin. The last preserved Pisco sediments at Sacaco were deposited ~ 4.5 Ma, while the overlying Caracoles Formation accumulated from ~ 2.7 Ma onwards. We identified a Pliocene angular unconformity encompassing 1.7 My between these formations, associated with a regional phase of uplift. Local and regional paleoenvironmental indicators suggest that shallow settings influenced by the offshore upwelling of ventilated and warm waters prevailed until the early Pliocene. We present an extensive synthesis of the late Miocene–Pleistocene vertebrate fossil record, which allows for an ecological characterization of the coastal-marine communities, an assessment of biodiversity trends, and changes in coastal-marine lineages in relation to modern HCS faunas. Our synthesis shows that: (i) typical endemic coastal Pisco vertebrates persisted up to ~ 4.5 Ma, (ii) first modern HCS toothed cetaceans appear at ~ 7–6 Ma, coinciding with a decline in genus diversity, and (iii) a vertebrate community closer to the current HCS was only reached after 2.7 Ma. The genesis of the Peruvian coastal ecosystem seems to be driven by a combination of stepwise transformations of the coastal geomorphology related to local tectonic pulses and by a global cooling trend leading to the modern oceanic circulation system. © The Author(s) 2021. corrected publication 2021 |
| abstract_unstemmed |
Abstract The highly productive waters of the Humboldt Current System (HCS) host a particular temperate ecosystem within the tropics, whose history is still largely unknown. The Pisco Formation, deposited during Mio-Pliocene times in the Peruvian continental margin has yielded an outstanding collection of coastal-marine fossils, providing an opportunity to understand the genesis of the HCS ecosystem. We present a comprehensive review, completed with new results, that integrates geological and paleontological data from the last 10 My, especially focusing on the southern East Pisco Basin (Sacaco area). We discuss the depositional settings of the Pisco Formation and integrate new U/Pb radiometric ages into the chronostratigraphic framework of the Sacaco sub-basin. The last preserved Pisco sediments at Sacaco were deposited ~ 4.5 Ma, while the overlying Caracoles Formation accumulated from ~ 2.7 Ma onwards. We identified a Pliocene angular unconformity encompassing 1.7 My between these formations, associated with a regional phase of uplift. Local and regional paleoenvironmental indicators suggest that shallow settings influenced by the offshore upwelling of ventilated and warm waters prevailed until the early Pliocene. We present an extensive synthesis of the late Miocene–Pleistocene vertebrate fossil record, which allows for an ecological characterization of the coastal-marine communities, an assessment of biodiversity trends, and changes in coastal-marine lineages in relation to modern HCS faunas. Our synthesis shows that: (i) typical endemic coastal Pisco vertebrates persisted up to ~ 4.5 Ma, (ii) first modern HCS toothed cetaceans appear at ~ 7–6 Ma, coinciding with a decline in genus diversity, and (iii) a vertebrate community closer to the current HCS was only reached after 2.7 Ma. The genesis of the Peruvian coastal ecosystem seems to be driven by a combination of stepwise transformations of the coastal geomorphology related to local tectonic pulses and by a global cooling trend leading to the modern oceanic circulation system. © The Author(s) 2021. corrected publication 2021 |
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| title_short |
Late Neogene evolution of the Peruvian margin and its ecosystems: a synthesis from the Sacaco record |
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https://dx.doi.org/10.1007/s00531-021-02003-1 |
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Salas-Gismondi, Rodolfo DeVries, Thomas J. Baby, Patrice de Muizon, Christian Altamirano, Alí Barbosa-Espitia, Angel Foster, David A. Quispe, Kelly Cardich, Jorge Gutiérrez, Dimitri Perez, Alexander Valqui, Juan Urbina, Mario Carré, Matthieu |
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Salas-Gismondi, Rodolfo DeVries, Thomas J. Baby, Patrice de Muizon, Christian Altamirano, Alí Barbosa-Espitia, Angel Foster, David A. Quispe, Kelly Cardich, Jorge Gutiérrez, Dimitri Perez, Alexander Valqui, Juan Urbina, Mario Carré, Matthieu |
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