An accurate record of volcanic ash fall deposition as characterized by dispersed organic matter in a lower Permian tonstein layer (Faxinal Coalfield, Paraná Basin, Brazil)
For the first time, the dispersed organic matter in the tonstein layer interbedded with a coal seam in the Faxinal Coalfield (Sakmarian, Southern Paraná Basin, Brazil) is characterized. The deposition of clusters of pollen grains was highly influenced by the intense ash fall process that probably o...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB)
2013-07-01
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| Series: | Geologica Acta |
| Subjects: | |
| Online Access: | https://revistes.ub.edu/index.php/GEOACTA/article/view/7454 |
| _version_ | 1797654681216876544 |
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| author | M.W. SIMAS M. GUERRA-SOMMER J.G. MENDONÇA FILHO M. CAZZULO-KLEPZIG M.L.L. FORMOSO I. DEGANI-SCHMIDT |
| author_facet | M.W. SIMAS M. GUERRA-SOMMER J.G. MENDONÇA FILHO M. CAZZULO-KLEPZIG M.L.L. FORMOSO I. DEGANI-SCHMIDT |
| author_sort | M.W. SIMAS |
| collection | DOAJ |
| description |
For the first time, the dispersed organic matter in the tonstein layer interbedded with a coal seam in the Faxinal Coalfield (Sakmarian, Southern Paraná Basin, Brazil) is characterized. The deposition of clusters of pollen grains was highly influenced by the intense ash fall process that probably occurred during seasonal dehiscence of reproductive structures. The well-preserved phytoclasts with their upper and lower leaf cuticles stuck together indicate that the rapid fall of ash on this material hindered organic biodegradation. The preservation of seemingly autochthonous Botryococcus colonies at the top of the tonstein layer is evidence of the subaqueous deposition of this layer. The darkening in cuticles and xylem phytoclasts can be attributed to different causes: the thermal influence of ash fall during deposition, chemical effects of the ash, prolonged oxidation of organic matter in low water level conditions or the burning of plant organs by wildfires. Analyses of dispersed organic matter along the tonstein layer showed that the organic matter succession reflects the composition of different plant strata (herbaceous pteridophytes and arboreal glossopterids-cordaitaleans) around the deposition site.
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| first_indexed | 2024-03-11T17:03:02Z |
| format | Article |
| id | doaj.art-26aec5e606e54041bc8c3a012baf48f5 |
| institution | Directory Open Access Journal |
| issn | 1696-5728 |
| language | English |
| last_indexed | 2024-03-11T17:03:02Z |
| publishDate | 2013-07-01 |
| publisher | Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB) |
| record_format | Article |
| series | Geologica Acta |
| spelling | doaj.art-26aec5e606e54041bc8c3a012baf48f52023-10-20T07:05:39ZengUniversitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB)Geologica Acta1696-57282013-07-01111An accurate record of volcanic ash fall deposition as characterized by dispersed organic matter in a lower Permian tonstein layer (Faxinal Coalfield, Paraná Basin, Brazil)M.W. SIMAS0M. GUERRA-SOMMER1J.G. MENDONÇA FILHO2M. CAZZULO-KLEPZIG3M.L.L. FORMOSO4I. DEGANI-SCHMIDT5Instituto de Geociências, Universidade Federal do Rio Grande do Sul (UFRGS). Av. Bento Gonçalves, 9500 -91501.970, Porto Alegre, RS, Brazil.Instituto de Geociências, Universidade Federal do Rio Grande do Sul (UFRGS). Av. Bento Gonçalves, 9500 -91501.970, Porto Alegre, RS, Brazil.Instituto de Geociências, Universidade Federal do Rio de Janeiro (UFRJ). Ilha do Fundão - 21949-900, Río de Janeiro, RJ, Brazi.Instituto de Geociências, Universidade Federal do Rio Grande do Sul (UFRGS). Av. Bento Gonçalves, 9500 -91501.970, Porto Alegre, RS, Brazil.Instituto de Geociências, Universidade Federal do Rio Grande do Sul (UFRGS). Av. Bento Gonçalves, 9500 -91501.970, Porto Alegre, RS, Brazil.Instituto de Geociências, Universidade Federal do Rio Grande do Sul (UFRGS). Av. Bento Gonçalves, 9500 -91501.970, Porto Alegre, RS, Brazil. For the first time, the dispersed organic matter in the tonstein layer interbedded with a coal seam in the Faxinal Coalfield (Sakmarian, Southern Paraná Basin, Brazil) is characterized. The deposition of clusters of pollen grains was highly influenced by the intense ash fall process that probably occurred during seasonal dehiscence of reproductive structures. The well-preserved phytoclasts with their upper and lower leaf cuticles stuck together indicate that the rapid fall of ash on this material hindered organic biodegradation. The preservation of seemingly autochthonous Botryococcus colonies at the top of the tonstein layer is evidence of the subaqueous deposition of this layer. The darkening in cuticles and xylem phytoclasts can be attributed to different causes: the thermal influence of ash fall during deposition, chemical effects of the ash, prolonged oxidation of organic matter in low water level conditions or the burning of plant organs by wildfires. Analyses of dispersed organic matter along the tonstein layer showed that the organic matter succession reflects the composition of different plant strata (herbaceous pteridophytes and arboreal glossopterids-cordaitaleans) around the deposition site. https://revistes.ub.edu/index.php/GEOACTA/article/view/7454TonsteinOrganic matterVolcanic ash fallSouthern Paraná Basin |
| spellingShingle | M.W. SIMAS M. GUERRA-SOMMER J.G. MENDONÇA FILHO M. CAZZULO-KLEPZIG M.L.L. FORMOSO I. DEGANI-SCHMIDT An accurate record of volcanic ash fall deposition as characterized by dispersed organic matter in a lower Permian tonstein layer (Faxinal Coalfield, Paraná Basin, Brazil) Geologica Acta Tonstein Organic matter Volcanic ash fall Southern Paraná Basin |
| title | An accurate record of volcanic ash fall deposition as characterized by dispersed organic matter in a lower Permian tonstein layer (Faxinal Coalfield, Paraná Basin, Brazil) |
| title_full | An accurate record of volcanic ash fall deposition as characterized by dispersed organic matter in a lower Permian tonstein layer (Faxinal Coalfield, Paraná Basin, Brazil) |
| title_fullStr | An accurate record of volcanic ash fall deposition as characterized by dispersed organic matter in a lower Permian tonstein layer (Faxinal Coalfield, Paraná Basin, Brazil) |
| title_full_unstemmed | An accurate record of volcanic ash fall deposition as characterized by dispersed organic matter in a lower Permian tonstein layer (Faxinal Coalfield, Paraná Basin, Brazil) |
| title_short | An accurate record of volcanic ash fall deposition as characterized by dispersed organic matter in a lower Permian tonstein layer (Faxinal Coalfield, Paraná Basin, Brazil) |
| title_sort | accurate record of volcanic ash fall deposition as characterized by dispersed organic matter in a lower permian tonstein layer faxinal coalfield parana basin brazil |
| topic | Tonstein Organic matter Volcanic ash fall Southern Paraná Basin |
| url | https://revistes.ub.edu/index.php/GEOACTA/article/view/7454 |
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