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coccolith n.【植物;植物學】顆石藻。

coccus

This study is a post - cruise study of this leg , calcareous nannofossil samples from sites 1146 , 1147 and 1148 of leg 184 were analyzed to provide a high - resolution biostratigraphy for this leg and to investigate morphological variation of coccolith genus gephyrocapsa . the main results of this study are : 1 . 12 late pliocene to pleistocene bio - events were recognized and 6 zones of martini ( 1971 ) were determined for the upper sediment sequences of sites 1146 and 1148 本文作為大洋鉆探項目船下后續研究的一部分,對184航次中的1146站位和1147 、 1148站位的樣品進行了分析和研究,在船上科學家已經建立起的地層框架的基礎上進一步加密采樣,對生物事件標志化石類別進行數量統計,進一步確定了12個生物事件在鉆孔中的深度,建立起了兩個站位的高分辨率的鈣質超微化石生物地層框架。

This result was the biochronological base for estimating sample ages in the study on genus gephyrocapsa . 2 . morphological variation of gephyrocapsa was investigated based on biometrically analyzing 6 morphological features of a coccolith placolith , e . g ( 2 )結合時間序列來對橋石種類的在演化的過程中形態變化進行分析,發現在整體演變的進程中,幾種形態因子中一直處在最劇烈變化中的是盾盤的長度。