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首页> 外文期刊>Oceanology >Fossil Microplankton of the Bottom Sediments of the Afanasii Nikitin Seamount in the Central Part of the Indian Ocean
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Fossil Microplankton of the Bottom Sediments of the Afanasii Nikitin Seamount in the Central Part of the Indian Ocean

机译：印度洋中部阿凡纳西·尼基丁海山底部沉积物的化石微浮游生物

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摘要

Microplankton (coccoliths and diatoms) from the bottom sediments of the Afanasii Nikitin Seamount area (the Indian Ocean) was examined. The species of the calcareous nannoplankton refer to the Late Cretaceous; Paleocene; Eocene; Oligocene; Early, Early Middle, and Late Miocene; Late Plicoene; and Late Pleistocene-Holocene. Within the latter period, tropical associations of diatoms were also recognized. The absenceof sediments of the major part of the Middle Miocene, Early Pliocene, and Early Pleistocene suggests probable gaps in sedimentation during these periods. In addition to the autochtonous species, nannoplankton assemblages include more ancient ones supplied from the Afanasii Nikitin Rise. All Cenozoic assemblages imply warm-water conditions in the upper water layer. The Late Pleistocene coccoliths and diatoms also provide evidence about the warm-water conditions of the microflora development.
机译：检查了Afanasii Nikitin海山地区（印度洋）底部沉积物中的浮游生物（浮游藻类和硅藻）。钙质纳米浮游生物的种类是指晚白垩纪。古新世;始新世渐新世中新世早期，中早期和晚期;晚杨麻;和晚更新世-全新世。在后一个时期，硅藻的热带联系也被认识到。中新世，上新世和早更新世的主要部分没有沉积物，这表明这些时期的沉积可能存在间隙。除了自生物种外，浮游生物组合还包括由阿凡纳西尼基丁（Afanasii Nikitin Rise）提供的更古老的组合。所有新生代组合都暗示着上部水层中存在温水条件。晚更新世的晚绿藻和硅藻也提供了有关微生物群落发育的温水条件的证据。

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