PLIOCENE BIOSTRATIGRAPHY OF DSDP SITES 111 AND 116 FROM THE NORTH ATLANTIC OCEAN AND THE AGE OF NORTHERN HEMISPHERE GLACIATION
PLIOCENE BIOSTRATIGRAPHY OF DSDP SITES 111 AND 116 FROM THE NORTH ATLANTIC OCEAN AND THE AGE OF NORTHERN HEMISPHERE GLACIATION
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北大西洋 DSDP 111 和 116 地点的上新世生物地层学和北半球冰川时代
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通讯作者：
F. E. Huggett
中科院分区：
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作者：
F. E. Huggett
。-基于有孔虫-超微化石的生物地层学分析表明，北大西洋第111和116个DSDP站点的初始冰流水平为2.5 Ma，而不是之前建议的3.0 Ma。这一数据和其他数据表明，北半球冰盖直到大约2.5 Ma才形成。中美洲航道的关闭引起了全球海洋循环系统的显著变化
. - A foraminiferal-nannofossil based biostratigraphic analysis of DSDP sites 111 and 116 from the North Atlantic Ocean indicates 2.5 Ma instead of 3.0 Ma, as previously suggested, for the level of initial ice rafting. This and other data suggest that development of Northern Hemisphere ice sheets did not take place until about 2.5 Ma. The closing of the Central American seaway induced pronounced changes in the global ocean circulation system