黄河托克托段早中更新世湖相地层剖面的建立及其意义

根据黄河托克托段格尔图营剖面的沉积记录,对于其湖相沉积的时代和易溶盐含量作了初步分析,认为它是存在于早、中更新世时期的微咸－半咸水湖,尤其是其消亡前期成为典型的半咸水湖,说明当时湖泊为半干旱地区的内陆湖。在中更新世中晚期时,此内陆湖切穿,沟通形成现在之黄河河道。该剖面建立的意义在于提供黄河土黩特古湖性质证据,并初步建立了内蒙古高原的“泥河弯层”剖面。     

Use-wear evidence confirms the earliest hafted chipped-stone adzes of Upper Palaeolithic in northern China

Chipped-stone adze-shaped objects (ASOs) were identified from a few Upper Palaeolithic sites in northern China. Its morpho- logical form resembles to ground-stone type-specific adze, but the function of the ASO has never been assessed. The objective of this study is to investigate the use function of this particular tool type recovered from the Hutouliang site in the Nihewan Basin of northern China. In this study, the lithic use-wear analysis is applied to examining microscopically edge-damages and sur- fac...     

北京西山清水期侵蚀及其地貌环境演变

根据马兰期地貌与沉积的分布与其与清水期浸蚀与地貌的关系，推得清水河流域最深侵蚀谷即为清水期侵蚀地貌，由此可以确定清水期侵蚀地貌与沉积在地貌断面上的位置。马兰期堆积有上下２层，按堆积层特征和地层相互推叠关系，断定清水期侵蚀谷内初期充填物的堆积时代大致相当于萨拉乌苏层，时间应在（５￣７）×１０＾４ａＢ．Ｐ．．在此基础上讨论了清水河流域晚更新世以来地貌的成因与演化。     

咸阳市区晚更新世黄土微结构特征及其环境意义

目的揭示咸阳市区晚更新世黄土的微结构特征,探讨黄土微结构特征与其形成环境的关系,为区域环境提供科学依据。方法应用粒度分析和扫描电子显微镜对咸阳市区晚更新世黄土．古土壤系列的微结构进行分析研究。结果粒度小于0．005 mm的黏粒级含量在黄土与古土壤中差异最大,S1古土壤高达39．7％,而L1黄土仅24％;S1古土壤黏粒中大量铁质黏粒胶膜呈流胶状出现并有次生伊利石的产出,结构密实;L1黄土微骨架颗粒相互支架,黏粒胶结物含量较少,胶结程度差,土质疏松。结论咸阳市区晚更新世S1古土壤形成在湿热的森林环境,L1黄土形成于干冷的草原环境,S0黑垆土形成于凉湿气候环境。     

长江三角洲地区晚更新世晚期的孢粉特征及古环境

通过对长江三角洲地区晚第四纪沉积10多口钻井的孢粉、藻类资料分析研究，在以往较少见到化石的晚更新世晚期的硬粘土沉积中找到了能明确指示古环境的孢粉、藻类化石，发现了两种不同的孢粉组合，一种是以环纹藻Concentricystes占优势的孢粉组合，另一种是以陆生植物Pinus-Cupressaceae-Picea-Abies-Quercus（deciduous）-Grarnineae占优势的孢粉组合，证实了该层硬粘土形成期间曾经历滞水和水退的环境交替．也为探讨硬粘土成因、沉积环境提供了可靠的生物化石依据．     

Huanglong Cave, a new late Pleistocene hominid site in Hubei Province, China

For the past two decades, the modern human origins debate has received significant interest from both the scientific community and the public. The two hypothe- ses “Out of Africa” and “Mutiregional evolution” are focuses of this debate[1-3]. In partic…     

Middle and late pleistocene biostratigraphy and paleoclimate of an open-pit coal mine Schoningen Germany

In the Schoningen open-pit lignite mine (Northeastern Lower Saxony, Germany), Tertiary strata are unconformably overlain by Quaternary sediments and soils of Middle and Late Pleistocene and Holocene age. The complex Pleistocene sequence contains a number of interglacial and interstadial deposits and soils and is of scientific importance for Late Middle Pleistocene stratigraphy of Central Europe and because of archeological evidence of early human occupation by Home erectus. There is evidence of four interglacials younger than the third-last glaciation (Elsterian). The classical Holsteinian is followed by the newly discovered biostratigraphic unit Reinsdorf, an interglacial complex which contains archeological horizons with wooden artifacts. Based on paleoecological fauna and flora data, the lithological setting and preliminary age determinations, the Reinsdorf Interglacial likely correlates with marine isotope stage 9 and the Holsteinian with stage 11.     

第四纪早期丽蚌的电子自旋共振(ESR)年龄测定与泥河湾动物群的年代

对化石进行电子自旋共振(ESR)研究是近几年发展起来的一种新的测定年代技术.本文介绍了这种技术的基本原理和测定方法.应用ESR 方法对我国北方第四纪早期标准地层——泥河湾地层中部所产丽蚌化石进行了测定,并得到两个样品的年龄,分别为1.37±0.20和1.22±0.18百万年.初步确定,泥河湾地层中一个层段(第二层段)的形成年代应属早更新世晚期,而泥河湾动物群的年代应属早更新世中晚期.