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标题：Biochronology and geochronology of Late Neogene Central Arctic deep-sea cores
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作者：Yvonne Herman ; Helmut Keupp
期刊名称：Polar Research
印刷版ISSN：1751-8369
出版年度：1987
卷号：5
期号：3
页码：307-308
DOI：10.3402/polar.v5i3.6897
语种：English
出版社：Co-Action Publishing
摘要：Microfaunal and foraminifera1 oxygen isotope data from the Chukchi Plateau, the Alpha-Mendeleev Rise and the Lomonosov Ridge deep-sea cores (Table 1) representing the last 4.5-5 million years, yield evidence of significant paleoceanographic and paleoclimatic changes. Uranium series isotopes and magnetic stratigraphy provide the time frame for these Late Neogene sequences (Herman & Osmond 1984). The similarity in faunal and floral patterns as well as in lithology allows cor- .relation of cores over widely separated regions. Several datum levels were recognized. They include the Globigerina egelida acme zone between -1.8 and -1.6Ma, the Globigerina quinqueloba acme zone 0.7 Ma and -0.34-0.24 Ma, the Stetsonia horuarhi acme zone between -1.66 and - 1 Ma and the Orthopithonella acme zone between -1.66 and -0.73 Ma (Fig. 1).