Calcareous nannofossil biohorizons of ODP Leg 167 sites
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Selected calcareous nannofossils were investigated by means of quantitative and semiquantitative methods in middle Miocene to Pleistocene sediments from the California margin...
研究人员采用定量与半定量方法，对加利福尼亚陆缘中中新世至更新世沉积物中的经筛选钙质超微化石（calcareous nannofossils）开展了相关研究……
