Holocene Sea-Level Changes in Southern Brazil Based on High-Resolution Radar Stratigraphy
This paper focuses on high-resolution coastal stratigraphy data, which were revealed by the Ground Penetrating Radar (GPR) system. Surveys performed with GPR on the surface of prograded barriers reveal patterns of reflections that allow the interpretation of the geometry and stratigraphy of coastal...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-07-01
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| Series: | Geosciences |
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| Online Access: | https://www.mdpi.com/2076-3263/11/8/326 |
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| author | Eduardo Guimarães Barboza Sergio Rebello Dillenburg Matias do Nascimento Ritter Rodolfo José Angulo Anderson Biancini da Silva Maria Luiza Correaa da Camara Rosa Felipe Caron Maria Cristina de Souza |
| author_facet | Eduardo Guimarães Barboza Sergio Rebello Dillenburg Matias do Nascimento Ritter Rodolfo José Angulo Anderson Biancini da Silva Maria Luiza Correaa da Camara Rosa Felipe Caron Maria Cristina de Souza |
| author_sort | Eduardo Guimarães Barboza |
| collection | DOAJ |
| description | This paper focuses on high-resolution coastal stratigraphy data, which were revealed by the Ground Penetrating Radar (GPR) system. Surveys performed with GPR on the surface of prograded barriers reveal patterns of reflections that allow the interpretation of the geometry and stratigraphy of coastal deposits in a continuous mode. At the Curumim prograded barrier in southern Brazil (29°30′ S–49°53′ W), a two-dimensional transverse GPR survey revealed, with high precision, a serial of contacts between aeolian deposits of relict foredunes and relict beach deposits that have a strong correlation with sea level. In a 4 km GPR profile, a total of 24 of these contacts were identified. The high accurate spatial positioning of the contacts combined with Optical Stimulated Luminescence dating resulted in the first confident sea-level curve that tells the history of sea-level changes during the last 7 ka on the southernmost sector of the Brazilian coast. The curve shows that sea-level was still rising before 6 ka BP, with a maximum level of 1.9 m reached close to 5 ka BP; after that, sea-level started to falling slowly until around 4 ka BP when fall accelerated. |
| first_indexed | 2024-03-10T08:47:19Z |
| format | Article |
| id | doaj.art-f5ce1516b90743c0bc4d9052d07ad9d2 |
| institution | Directory Open Access Journal |
| issn | 2076-3263 |
| language | English |
| last_indexed | 2024-03-10T08:47:19Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Geosciences |
| spelling | doaj.art-f5ce1516b90743c0bc4d9052d07ad9d22023-11-22T07:47:47ZengMDPI AGGeosciences2076-32632021-07-0111832610.3390/geosciences11080326Holocene Sea-Level Changes in Southern Brazil Based on High-Resolution Radar StratigraphyEduardo Guimarães Barboza0Sergio Rebello Dillenburg1Matias do Nascimento Ritter2Rodolfo José Angulo3Anderson Biancini da Silva4Maria Luiza Correaa da Camara Rosa5Felipe Caron6Maria Cristina de Souza7Centro de Estudos de Geologia Costeira e Oceânica, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre 91509-900, RS, BrazilCentro de Estudos de Geologia Costeira e Oceânica, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre 91509-900, RS, BrazilCentro de Estudos Costeiros, Limnológicos e Marinhos, Campus do Litoral, Universidade Federal do Rio Grande do Sul, Imbé 95625-000, RS, BrazilLaboratório de Estudos Costeiros, Departamento de Geologia, Universidade Federal do Paraná, Curitiba 81530-000, PR, BrazilGerência de Licenciamento Ambiental de Atividades Estratégicas, Instituto do Meio Ambiente de Santa Catarina, Florianópolis 88020-300, SC, BrazilCentro de Estudos de Geologia Costeira e Oceânica, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre 91509-900, RS, BrazilCentro de Estudos Costeiros, Limnológicos e Marinhos, Campus do Litoral, Universidade Federal do Rio Grande do Sul, Imbé 95625-000, RS, BrazilLaboratório de Estudos Costeiros, Departamento de Geologia, Universidade Federal do Paraná, Curitiba 81530-000, PR, BrazilThis paper focuses on high-resolution coastal stratigraphy data, which were revealed by the Ground Penetrating Radar (GPR) system. Surveys performed with GPR on the surface of prograded barriers reveal patterns of reflections that allow the interpretation of the geometry and stratigraphy of coastal deposits in a continuous mode. At the Curumim prograded barrier in southern Brazil (29°30′ S–49°53′ W), a two-dimensional transverse GPR survey revealed, with high precision, a serial of contacts between aeolian deposits of relict foredunes and relict beach deposits that have a strong correlation with sea level. In a 4 km GPR profile, a total of 24 of these contacts were identified. The high accurate spatial positioning of the contacts combined with Optical Stimulated Luminescence dating resulted in the first confident sea-level curve that tells the history of sea-level changes during the last 7 ka on the southernmost sector of the Brazilian coast. The curve shows that sea-level was still rising before 6 ka BP, with a maximum level of 1.9 m reached close to 5 ka BP; after that, sea-level started to falling slowly until around 4 ka BP when fall accelerated.https://www.mdpi.com/2076-3263/11/8/326sea-level curvecoastal evolutionprograded barrierGPR |
| spellingShingle | Eduardo Guimarães Barboza Sergio Rebello Dillenburg Matias do Nascimento Ritter Rodolfo José Angulo Anderson Biancini da Silva Maria Luiza Correaa da Camara Rosa Felipe Caron Maria Cristina de Souza Holocene Sea-Level Changes in Southern Brazil Based on High-Resolution Radar Stratigraphy Geosciences sea-level curve coastal evolution prograded barrier GPR |
| title | Holocene Sea-Level Changes in Southern Brazil Based on High-Resolution Radar Stratigraphy |
| title_full | Holocene Sea-Level Changes in Southern Brazil Based on High-Resolution Radar Stratigraphy |
| title_fullStr | Holocene Sea-Level Changes in Southern Brazil Based on High-Resolution Radar Stratigraphy |
| title_full_unstemmed | Holocene Sea-Level Changes in Southern Brazil Based on High-Resolution Radar Stratigraphy |
| title_short | Holocene Sea-Level Changes in Southern Brazil Based on High-Resolution Radar Stratigraphy |
| title_sort | holocene sea level changes in southern brazil based on high resolution radar stratigraphy |
| topic | sea-level curve coastal evolution prograded barrier GPR |
| url | https://www.mdpi.com/2076-3263/11/8/326 |
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