Early Ordovician conodonts from Zhejiang Province,southeast China and their biostratigraphic and palaeobiogeographic implications

Forty-two conodont species are documented from the Liuxia, Shijiatou and Jingshan formations in Zhejiang Province of southeast China, located palaeogeographically on the Jiangnan Slope offshore to the Yangtze Platform. From these faunas, eight successive conodont biozones of Tremadocian to middle Floian (Early Ordovician) age are recognized, including the Cordylodus lindstromi Biozone, Cordylodus angulatus Biozone, Chosonodina herfurthi Biozone, Paltodus deltifer Biozone, Paroistodus proteus Biozone, Triangulodus bifidus Biozone, Serratognathus diversus Biozone and Prioniodus elegans Biozone. Several zonal index species of the Baltoscandian succession—Paltodus deltifer, Paroistodus proteus and Prioniodus elegans—are described and illustrated in detail for the first time from South China. Co-occurrence of P. proteus and Serratognathus bilobatus in several samples below the appearance of P. elegans also confirms correlation of the S. diversus Biozone (basal Floian) with the upper P. proteus Zone of the Baltoscandian succession. These Zhejiang faunas are dominated by pandemic forms, and are similar to those of the Open-Sea Realm elsewhere, inhabiting deep, offshore environments.     

先秦两汉时期铁器的生产应用与社会发展进程问题——读《先秦两汉铁器的考古学研究》

白云翔先生所著<先秦两汉铁器的考古学研究>一书出版已有些时日.我因早年研究过中国古代冶铁术,出版之初即通读了该书,并打算撰写书评,但考虑到自己近年的研究兴趣已更多地转移到了商代考古领域,未敢轻易置喙.最近再次拜读云翔先生的大作,深信该书提出的诸多议题,应引起学术界高度重视,故不揣浅陋,对有关问题略加讨论,不当之处,敬请作者和学界同仁指正.     

Blooming Kelsang FLOWERS

正Eagles soar overhead in April.Snowcovered Mt.Droda stands firm,and the Yarlung Tsangpo River is bordered by lovely,green farms.Willows sprout with tender shoots along the river bank.The entire plateau is peaceful.Garze in Tibetan refers to the beauty     

中国共产党与抗日民族统一战线的建立

中国共产党提出的以“国共合作”为核心的抗日民族统一战线,是中华民族战胜日本侵略者的法宝。1935年秋红军长征到达陕北后,中共中央即提出灵活运用广泛的统一战线,启动从内战到抗战的战略转变。在此后将近两年曲折、复杂、尖锐的斗争中,中国共产党依据国内外形势的发展变化,适时调整其策略,由“抗日反蒋”改变为“逼蒋抗日”以至“联蒋抗日”。在西安事变爆发后,全力进行调停,促成和平解决。国民党和南京政府在国际国内形势的影响与各党各军各派的逼迫下,其方针、政策也几经变化。国共第二次合作终于在七七事变抗日战争爆发、“八·一三”日军进攻上海威逼南京之际正式形成,抗日民族统一战线从而实际建立。在此过程中,中国共产党以民族利益为重,进行了坚忍不拔的努力,发挥了中流砥柱的作用,赢得了全国上下一致的信任。中国共产党在完成从内战到抗战的伟大战略转变,促使国共第二次合作形成和抗日民族统一战线建立的历史进程中,作出了不可磨灭的贡献,创造了十分丰富而宝贵的经验。     

旅游经济影响评估——线性规划在旅游决策中的运用

本文向旅游规划者提供线性规划模型,将其应用到国家级自然风景区--天柱山所在地潜山县,以此研究旅游发展对经济的影响,并建立一个基准水平作为比较的基础.     

Early history of Chinese domestic sheep indicated by ancient DNA analysis of Bronze Age individuals

China has a long history of sheep husbandry, and has several indigenous sheep breeds. However, the exact geographic origin of Chinese domestic sheep remains unclear. To provide valuable genetic information for origin of Chinese domestic sheep, we performed an ancient DNA study on 22 sheep excavated from four Bronze Age archaeological sites in Northern China. Two lineages (A and B) were observed in ancient Chinese sheep, of which lineage A was predominant reaching a frequency of 95.5%. Furthermore, phylogenetic network showed that the most frequent haplotype in ancient sheep was the founder of lineage A. These results suggest that Lineage A may hold the key to understanding the origin of Chinese domestic sheep. Sequence sharing and principal component analysis showed that the ancient Chinese sheep had a close affinity to modern Chinese sheep. However, there was no significant breed structure among three modern Chinese sheep groups, making it difficult to determine their relationship to ancient Chinese sheep. Lastly, our results imply that ancient DNA analysis could provide a new way to investigate prehistoric East-West contact.     

云南昆明石寨山出土汉代青铜器的初步分析

云南昆明的石寨山墓葬是汉代滇池区域的土著文化,为了了解该地汉代铜器的制作工艺水平,本研究通过金相显微镜观察、扫描电镜及能谱分析的现代分析手段来对M3、M5、M6、M7、M10、M12这6个墓葬群的31件青铜器展开探讨。结果显示在31件铜器样品中,有30件为铜锡合金,1件为红铜,所有器物均为铸造,其中有1件铜戈的刃部经历过热锻加工。这一分析结果丰富了石寨山文化的铜器研究,为器物的保护修复提供科学依据,同时也为云南汉代时期的铜器考古学以及金属技术史补充部分资料。