Dawn of metazoans: to what extent was this influenced by the onset of “modern-type plate tectonics”?
Abstract The appearance of complex megascopic multicellular eukaryotes in the Ediacaran occurred just when the dynamics of a cooling Earth allowed establishment of a new style of global tectonics that continues to the present as “modern-type plate tectonics”. The advent of this style was first regis...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Geologia
2020-05-01
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| Series: | Brazilian Journal of Geology |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892020000200606&tlng=en |
| _version_ | 1798021821458546688 |
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| author | Umberto G. Cordani Thomas R. Fairchild Carlos E. Ganade Marly Babinski Juliana de Moraes Leme |
| author_facet | Umberto G. Cordani Thomas R. Fairchild Carlos E. Ganade Marly Babinski Juliana de Moraes Leme |
| author_sort | Umberto G. Cordani |
| collection | DOAJ |
| description | Abstract The appearance of complex megascopic multicellular eukaryotes in the Ediacaran occurred just when the dynamics of a cooling Earth allowed establishment of a new style of global tectonics that continues to the present as “modern-type plate tectonics”. The advent of this style was first registered in 620 Ma-old coesite-bearing Ultra-High Pressure eclogites within the Transbrasiliano-Kandi mega-shear zone along the site of the West Gondwana Orogeny (WGO). These eclogites comprise the oldest evidence of slab-pull deep subduction capable of inducing continental collisions and producing high-relief Himalayan-type mega-mountains. Life, prior to this time, was essentially microscopic. Yet with increasing Neoproterozoic oxygenation and intensified influx of nutrients to Ediacaran oceans, resulting from the erosion of these mountains, complex macroscopic heterotrophic eukaryotes arose and diversified, taking the biosphere to a new evolutionary threshold. The repeated elevation of Himalayan-type mega-mountains ever since then has continued to play a fundamental role in nutrient supply and biosphere evolution. Other authors have alluded to the influence of Gondwana mountain-building upon Ediacaran evolution, however we claim here to have identified when and where it began. |
| first_indexed | 2024-04-11T17:19:42Z |
| format | Article |
| id | doaj.art-f76e69bde9f0448d950cecf71bb58cb9 |
| institution | Directory Open Access Journal |
| issn | 2317-4692 |
| language | English |
| last_indexed | 2024-04-11T17:19:42Z |
| publishDate | 2020-05-01 |
| publisher | Sociedade Brasileira de Geologia |
| record_format | Article |
| series | Brazilian Journal of Geology |
| spelling | doaj.art-f76e69bde9f0448d950cecf71bb58cb92022-12-22T04:12:31ZengSociedade Brasileira de GeologiaBrazilian Journal of Geology2317-46922020-05-0150210.1590/2317-4889202020190095Dawn of metazoans: to what extent was this influenced by the onset of “modern-type plate tectonics”?Umberto G. Cordanihttps://orcid.org/0000-0003-4425-5905Thomas R. Fairchildhttps://orcid.org/0000-0002-2410-175XCarlos E. Ganadehttps://orcid.org/0000-0002-2896-0551Marly Babinskihttps://orcid.org/0000-0003-2444-2404Juliana de Moraes Lemehttps://orcid.org/0000-0002-5833-4885Abstract The appearance of complex megascopic multicellular eukaryotes in the Ediacaran occurred just when the dynamics of a cooling Earth allowed establishment of a new style of global tectonics that continues to the present as “modern-type plate tectonics”. The advent of this style was first registered in 620 Ma-old coesite-bearing Ultra-High Pressure eclogites within the Transbrasiliano-Kandi mega-shear zone along the site of the West Gondwana Orogeny (WGO). These eclogites comprise the oldest evidence of slab-pull deep subduction capable of inducing continental collisions and producing high-relief Himalayan-type mega-mountains. Life, prior to this time, was essentially microscopic. Yet with increasing Neoproterozoic oxygenation and intensified influx of nutrients to Ediacaran oceans, resulting from the erosion of these mountains, complex macroscopic heterotrophic eukaryotes arose and diversified, taking the biosphere to a new evolutionary threshold. The repeated elevation of Himalayan-type mega-mountains ever since then has continued to play a fundamental role in nutrient supply and biosphere evolution. Other authors have alluded to the influence of Gondwana mountain-building upon Ediacaran evolution, however we claim here to have identified when and where it began.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892020000200606&tlng=enplate tectonicsmega-mountainsEdiacaran biota |
| spellingShingle | Umberto G. Cordani Thomas R. Fairchild Carlos E. Ganade Marly Babinski Juliana de Moraes Leme Dawn of metazoans: to what extent was this influenced by the onset of “modern-type plate tectonics”? Brazilian Journal of Geology plate tectonics mega-mountains Ediacaran biota |
| title | Dawn of metazoans: to what extent was this influenced by the onset of “modern-type plate tectonics”? |
| title_full | Dawn of metazoans: to what extent was this influenced by the onset of “modern-type plate tectonics”? |
| title_fullStr | Dawn of metazoans: to what extent was this influenced by the onset of “modern-type plate tectonics”? |
| title_full_unstemmed | Dawn of metazoans: to what extent was this influenced by the onset of “modern-type plate tectonics”? |
| title_short | Dawn of metazoans: to what extent was this influenced by the onset of “modern-type plate tectonics”? |
| title_sort | dawn of metazoans to what extent was this influenced by the onset of modern type plate tectonics |
| topic | plate tectonics mega-mountains Ediacaran biota |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892020000200606&tlng=en |
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