calcareous sediment 中文意思是什麼
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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解析度的鈣質超微化石生物地層框架。
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