四川歌乐山哺乳动物群     

杨钟健  刘东生 《地质学报》1950,30(1)

四川歌乐山洞穴沉积中之哺乳动物化石,为除万县之洞穴沉积以外最丰富之‘剑齿象—熊猫动物群’之材料。其中包括三十五属,共四十一种分属於八目内,中有新属新种二及新种八。分析此化石地点所代表者均属一动物群,仅第五十一地点有较古老型之动物之存在。若与华南各地如四川万县,广西武呜,云南富民,江苏丹阳及江西乐平之洞穴沉积中之化相比较可知俱为同一时期之动物。其主要之代表竹鼠,豪猪,熊,虎,剑齿象,貘,犀,猪等统之‘剑齿象—熊猫动物群’。此动物群与北京附近周口店之洞穴沉积为同一时期者。王林(G.H.R.von Koenigswald)及寇鲁伯(E.H.Colbert)称此动物群为“中国—马来动物群”与时代更老之下更新统之“印度—马来动物群”不同。但动物之发源与迁移常来往频烦,殊不限于一个方向之移入或迁出。故某一动物群之是否原生常就其中所具代表性之动物移入成份之多寡而决定之。歌乐山之动物群,亦即‘剑齿象—熊猫动物群’为一原生华南之动物群,受华北,印度及爪哇三方面动物移入之混合组成。其中以华北移入之份子较多,但此种参加之份子不足以影响此动物群之原生性。如标准之北方动物,兔,骆驼,马及羚羊等在此并无发现。而原生南方之剑齿象,熊猫,貘...  相似文献   

On the Reptilian Remains from Weiyuan,Szechuan,China C.C.YOUNG     

C.C.YOUNG 《地质学报》1944,(Z2):192-214,304,306

The following described reptilian remains were unearthed from the vicinity of Weiyuan’ by Mr. H. H. Yao of the National Geological Survey of China when he worked as a member of a geological party under the leadership of Dr. T. K. Huang in 1939. Most of the remains were collected from locality 1 and locality 6, as Yao  相似文献   

A new lead mine in the northern Pennines     

BRIAN YOUNG  & IAN FORBES 《Geology Today》1997,13(4):154-157

Plans by Durham County Council, owners of the Killhope Lead Mining Centre in Weardale, to open parts of the oroginal underground workings of Park Level Mine to visitors were frustrated when exploration of the mine revealed the seriously collapsed state of the workings. This disappointment has now been turned to advantage by the building of a new, 'artificial', specially constructed mine on the site, planned to be geologically consistent with the original mine. The new mine was recently officially opened by Tony Blair MP.  相似文献   

Confusing future geologists     

BRIAN YOUNG 《Geology Today》1990,6(3):90-90

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Using palaeoenvironmental DNA to reconstruct past environments: progress and prospects          下载免费PDF全文

NICOLAS J. RAWLENCE  DAVID J. LOWE  JAMIE R. WOOD  JENNIFER M. YOUNG  G. JOCK CHURCHMAN  YU‐TUAN HUANG  ALAN COOPER 《第四纪科学杂志》2014,29(7):610-626

Palaeoenvironmental DNA (PalEnDNA) is defined as ancient DNA (aDNA) originating from disseminated genetic material within palaeoenvironmental samples. Sources of PalEnDNA include marine and lake sediments, peat, loess, till, ice, permafrost, palaeosols, coprolites, preserved gut contents, dental calculus, tephras, and soils as well as deposits in caves/rockshelters and at archaeological sites. PalEnDNA analysis provides a relatively new tool for Quaternary and archaeological sciences and its applications have included palaeoenvironmental and palaeodietary reconstructions, testing hypotheses regarding megafaunal extinctions, human–environment interactions, taxonomic studies, and studies of DNA damage. Because PalEnDNA samples comprise markedly different materials, and represent wide‐ranging depositional and taphonomic contexts, various issues must be addressed to achieve robust, reproducible findings. Such issues include climatic and temporal limitations, the biological origin and state (free versus bound) of PalEnDNA, stratigraphic reliability, sterile sampling, ability to distinguish modern from aDNA signals, DNA damage and PCR amplification, DNA extraction methods, and taxonomic resolution. In this review, we provide a non‐specialist introduction to the use of PalEnDNA for Quaternary and archaeological researchers, assess attributes and limitations of this palaeoenvironmental tool, and discuss future prospects of using PalEnDNA to reconstruct past environments.  相似文献