REVISION OF LITHOSTRATIGRAPHIC NOMENCLATURE IN THE KOOBI FORA REGION, KENYA
REVISION OF LITHOSTRATIGRAPHIC NOMENCLATURE IN THE KOOBI FORA REGION, KENYA
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DOI：
10.1144/gsjgs.143.2.0297
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发表时间：
1986-03-01
影响因子：
2.7
通讯作者：
FEIBEL, CS
中科院分区：
文献类型：
--
作者：
BROWN, FH;FEIBEL, CS
最近我们对肯尼亚北部图尔卡纳湖东北部上更新世沉积层序的了解取得了进展，从而修订了岩石地层命名法，并对矿床进行了更完整的描述。根据重新定义，库比福拉组涵盖了整个上新世-更新世沉积序列，并细分为8个成员。这些成员是用火山灰层位来描述的，火山灰层位可以根据化学成分进行唯一的识别。修订后的地层学解决了所有早先与基于脊椎动物和软体动物研究的生物地层分区的冲突。库比福拉组的沉积层序总厚度为560m，时间跨度约为4.3~0.6 Ma。现在已经建立了详细的对比，将该序列与图尔卡纳盆地内的其他沉积以及哈达尔和亚丁湾的沉积联系起来。
Recent advances in our understanding of the Plio-Pleistocene sedimentary sequence northeast of Lake Turkana in northern Kenya has allowed a revision of the lithostratigraphic nomenclature and a more complete description of the deposits. As redefined, the Koobi Fora Formation encompasses the entire Plio-Pleistocene sedimentary sequence, and is subdivided into eight members. These members are delineated using volcanic ash horizons, which can be identified uniquely on the basis of chemical composition. The revised stratigraphy resolves all earlier conflicts with the biostratigraphic zonations based on vertebrate and molluscan studies. The sedimentary sequence of the Koobi Fora Formation attains an aggregate thickness of 560 m and spans the period from about 4.3 to 0.6 Ma. Detailed correlations have now been established to relate this sequence to other deposits within the Turkana Basin and to those at Hadar and in the Gulf of Aden.