{"title":"Distribution of calcareous nannofossils in the sparopel layers of hole 69-2SL, Meteor cruise 40/4, Eastern Mediterranean Sea.","authors":"D. Frydas, Christoph Hemlebent, Spyridōn, Bellas","doi":"10.58998/jnr2096","DOIUrl":null,"url":null,"abstract":"Calcareous nannoplankton associations from the sapropel layers of the gravity core M40/4, Station 69-2L, south-eastern Mediterranean Sea, have been examined. The investigated core mainly consists of nannofossil-/foraminifera-bearing mud, sapropel layers SI to SS/6 (except S2), and tephra layers. A subtropical coccolitb association was recognised in sapropels SI, S4, SS, SS/6, while a temperate one characterises S3. A reversal in dominance between Gephyrompse< muelleme and Emilie<nie< huxleyi was observed in sapropel S3 at 256cm subdepth. A significantly lower coccolith diversity was observed in the sapropel and tephra layers themselves, as in the foraminiferal mud, probably because of the influence of anoxic conditions, including bacterial activity, or ash-falls on the coccolith assemblages. In addition, a moderate to intensive corrosion characterises the nannofossils in the bioturbated upper part of some sapropels.","PeriodicalId":186533,"journal":{"name":"Journal of Nannoplankton Research","volume":"34 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Nannoplankton Research","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.58998/jnr2096","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Calcareous nannoplankton associations from the sapropel layers of the gravity core M40/4, Station 69-2L, south-eastern Mediterranean Sea, have been examined. The investigated core mainly consists of nannofossil-/foraminifera-bearing mud, sapropel layers SI to SS/6 (except S2), and tephra layers. A subtropical coccolitb association was recognised in sapropels SI, S4, SS, SS/6, while a temperate one characterises S3. A reversal in dominance between Gephyrompse< muelleme and Emilie