Eocene-Pliocene deep sea ostracodes from ODP site 744A, Southern Indian Ocean

Anais da Academia Brasileira de Ciências

Cristianini T. Bergue²  Abiraman Govindan¹ 

[1] ,Universidade do Vale do Rio dos Sinos Laboratório de Micropaleontologia São Leopoldo RS ,Brasil

关键词: Cenozoic;    ostracodes;    paleoceanography;    paleozoogeography;    Cenozóico;    ostracodes;    paleoceanografia;    paleozoogeografia;   

DOI  :  10.1590/S0001-37652010000300021

来源: SciELO

【 摘 要 】

The Eocene-Pliocene deep sea ostracodes from the ODP site 744A (Kerguelen Plateau) are herein studied under the taxonomic and paleoecologic aspects. 28 species are identified, being the genera Krithe, Cytherella and Dutoitella the most diversified. A faunal threshold was recorded in the Early Oligocene, which is tentatively explained under the knowledge of the paleoceanographical studies carried out not only in the Kerguelen Plateau but also in adjacent areas. The faunal turnover and variations in both richness and abundance possibly reflect the inception of psychrosphere and the influence of hydrological changes in the preservation of carapaces. Moreover, the influence of those changes on carbonate preservation is discussed as the cause of faunal impoverishment in the upper portion of the core.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License