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| Titel: |
Trepostomids (Bryozoa) from the Devonian of Salair, Kuznetsky Basin, Gorny and Rudny Altai, Russia |
| Auteur: |
Mesentseva O P |
| Verschenen in: |
Bulletin of geosciences |
| Paginering: | Jaargang 83 (2008) nr. 4 pagina's 449-460 |
| Jaar: |
2008 |
| Inhoud: |
Trepostomid bryozoa from the Devonian of the Salair-Altai region (SAR) have been investigated. Analysis of collected data has allowed the late Silurian-Devonian-Tournaisian interval to be divided into 16 stages, each represented by a specific association of trepostomids. Cyclic changes in trepostomid species composition are marked by alternations of low diversity. Four cycles can be recognized, beginning with an interval of high species diversity and ending with an interval of low species diversity. Synchronicity between cycles of species diversity and recognized transgressive-regressive cycles is evident in the SAR. Diversity peaks correspond to transgressions, whereas minimum diversity to regressions. Local cyclicity of the trepostomid diversity in the SAR does not coincide with a global bryozoan cyclicity. Species duration of Devonian trepostomids is assessed and their potential for biostratigraphical correlation within the SAR proven. |
| Uitgever: |
Czech Geological Survey |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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