Bulletin of geosciences | |
Trepostomids (Bryozoa) from the Devonian of Salair, Kuznetsky Basin, Gorny and Rudny Altai, Russia | |
Mesentseva OP1  | |
关键词: bryozoans; trepostomids; species association; diversity changes; Devonian; Salair-Altai region; | |
DOI : | |
来源: Czech Geological Survey | |
【 摘 要 】
TrepostomidbryozoafromtheDevonianoftheSalair-Altairegion(SAR)havebeeninvestigated.AnalysisofcollecteddatahasallowedthelateSilurian-Devonian-Tournaisianintervaltobedividedinto16stages,eachrepresentedbyaspecificassociationoftrepostomids.Cyclicchangesintrepostomidspeciescompositionaremarkedbyalternationsoflowdiversity.Fourcyclescanberecognized,beginningwithanintervalofhighspeciesdiversityandendingwithanintervaloflowspeciesdiversity.Synchronicitybetweencyclesofspeciesdiversityandrecognizedtransgressive-regressivecyclesisevidentintheSAR.Diversitypeakscorrespondtotransgressions,whereasminimumdiversitytoregressions.LocalcyclicityofthetrepostomiddiversityintheSARdoesnotcoincidewithaglobalbryozoancyclicity.SpeciesdurationofDevoniantrepostomidsisassessedandtheirpotentialforbiostratigraphicalcorrelationwithintheSARproven.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912090783008ZK.pdf | 2527KB | download |