Death and taphonomy of Holocene stromatolites from Lagoa Vermelha, Brazil
Stromatolites are laminated rocks, comprising both authigenic and allochthonous materials, which arise under strong influence of both microorganisms and environmental conditions. Growing stromatolites are rare nowadays, limiting our understanding on how microbial mats produce stromatolites. Stromato...
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Académie des sciences
2023-08-01
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| Series: | Comptes Rendus. Géoscience |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.201/ |
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| author | Keim, Carolina Neumann Farina, Marcos |
| author_facet | Keim, Carolina Neumann Farina, Marcos |
| author_sort | Keim, Carolina Neumann |
| collection | DOAJ |
| description | Stromatolites are laminated rocks, comprising both authigenic and allochthonous materials, which arise under strong influence of both microorganisms and environmental conditions. Growing stromatolites are rare nowadays, limiting our understanding on how microbial mats produce stromatolites. Stromatolites from Lagoa Vermelha in Brazil were claimed as living, lithifying structures several years ago, but recently have been reported as dead, bleached skeletons. Here we confirm that they are currently not forming new laminae. This was confirmed by the absence of the microbial mat coat, enabling colonization of exposed surfaces by barnacles, boring cyanobacteria, and burrowing metazoans, which contributed to erosion and loss of some original features while adding new, distinct biomarkers. |
| format | Article |
| id | doaj-art-e77e24f2733d4b308ea2d38eb44bd167 |
| institution | Kabale University |
| issn | 1778-7025 |
| language | English |
| publishDate | 2023-08-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Géoscience |
| spelling | doaj-art-e77e24f2733d4b308ea2d38eb44bd1672025-02-07T10:40:42ZengAcadémie des sciencesComptes Rendus. Géoscience1778-70252023-08-01355G225927710.5802/crgeos.20110.5802/crgeos.201Death and taphonomy of Holocene stromatolites from Lagoa Vermelha, BrazilKeim, Carolina Neumann0https://orcid.org/0000-0002-3208-4128Farina, Marcos1Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, BrazilUniversidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, BrazilStromatolites are laminated rocks, comprising both authigenic and allochthonous materials, which arise under strong influence of both microorganisms and environmental conditions. Growing stromatolites are rare nowadays, limiting our understanding on how microbial mats produce stromatolites. Stromatolites from Lagoa Vermelha in Brazil were claimed as living, lithifying structures several years ago, but recently have been reported as dead, bleached skeletons. Here we confirm that they are currently not forming new laminae. This was confirmed by the absence of the microbial mat coat, enabling colonization of exposed surfaces by barnacles, boring cyanobacteria, and burrowing metazoans, which contributed to erosion and loss of some original features while adding new, distinct biomarkers.https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.201/StromatoliteLagoa VermelhaFossilizationHypersalineFluorescence |
| spellingShingle | Keim, Carolina Neumann Farina, Marcos Death and taphonomy of Holocene stromatolites from Lagoa Vermelha, Brazil Comptes Rendus. Géoscience Stromatolite Lagoa Vermelha Fossilization Hypersaline Fluorescence |
| title | Death and taphonomy of Holocene stromatolites from Lagoa Vermelha, Brazil |
| title_full | Death and taphonomy of Holocene stromatolites from Lagoa Vermelha, Brazil |
| title_fullStr | Death and taphonomy of Holocene stromatolites from Lagoa Vermelha, Brazil |
| title_full_unstemmed | Death and taphonomy of Holocene stromatolites from Lagoa Vermelha, Brazil |
| title_short | Death and taphonomy of Holocene stromatolites from Lagoa Vermelha, Brazil |
| title_sort | death and taphonomy of holocene stromatolites from lagoa vermelha brazil |
| topic | Stromatolite Lagoa Vermelha Fossilization Hypersaline Fluorescence |
| url | https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.201/ |
| work_keys_str_mv | AT keimcarolinaneumann deathandtaphonomyofholocenestromatolitesfromlagoavermelhabrazil AT farinamarcos deathandtaphonomyofholocenestromatolitesfromlagoavermelhabrazil |