BENTHIC FORAMINIFERS FROM LOWER ALBIAN BLACK SHALES (SITE 1049, ODP LEG 171): EVIDENCE FOR A NON “UNIFORMITARIAN” RECORD
BENTHIC FORAMINIFERS FROM LOWER ALBIAN BLACK SHALES (SITE 1049, ODP LEG 171): EVIDENCE FOR A NON “UNIFORMITARIAN” RECORD
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来自下阿尔比安黑页岩的底栖有孔虫（地点 1049，ODP 段 171）：非“均一”记录的证据
DOI：
10.2113/0310060
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发表时间：
2001
影响因子：
1.1
通讯作者：
J. Erbacher
中科院分区：
文献类型：
--
作者：
A. Holbourn;W. Kuhnt;J. Erbacher
对1049号大洋钻探地点下白垩统黑色页岩中的海底有孔虫与现代和中生代高碳流/低氧组合的对比表明，来自厌氧环境的海底有孔虫没有优先的测试形态特征，因为这些组合几乎代表了所有测试形态的光谱。1049站位的下白垩统底栖有孔虫组合是首次发现的黑色页岩组合，其中Fursenkoina vissida、Ellipsoidella cuneata、Pleurostomella reussi和Osangularia schloenbachi均为Rotaliina亚目的成员。因此，早期阿尔卑斯黑色页岩组合与主要由Textulariina亚目和Lagenina亚目代表主导的阿普提亚和侏罗纪组合明显不同。Rotaliina亚目的成员在晚白垩世和新生代继续大量辐射，最终形成了很大比例的现代动物群，包括许多高生产力/低氧分类群。没有证据表明，随着时间的推移，对低氧的渐进式形态适应。
A comparison of benthic foraminifers from lower Albian black shales at Ocean Drilling Program Site 1049 with modern and Mesozoic high carbon flux/low oxygen assemblages indicate that no preferential test shape characterizes benthic foraminifers from dysaerobic environments, as almost the entire spectrum of test morphologies is represented within these assemblages. The lower Albian benthic foraminiferal assemblages from Site 1049 are the first black shale assemblages to be dominated by Fursenkoina viscida, Ellipsoidella cuneata, Pleurostomella reussi and Osangularia schloenbachi all members of the suborder Rotaliina. Thus, early Albian black shale assemblages differ markedly from Aptian and Jurassic assemblages dominated mainly by representatives of the suborders Textulariina and Lagenina. Members of the suborder Rotaliina continued to radiate profusely during the Late Cretaceous and Cenozoic, eventually giving rise to a large proportion of the modern fauna, including many of the high productivity/low oxygen taxa. There is no evidence for a progressive morphological adaptation to low oxygen with time.