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2001年对镇江莲花洞进行了第二次考古发掘,从洞内首次获7件石制品和一批哺乳动物化石。5件石核和2件刮削器分别用石英和火成岩制成,初步判断属于旧石器时代中期或稍早,文化面貌似与上世纪末在苏南地区发现的旧石器早、中期文化略有不同。根据对第2、3堆积层间的新生碳酸盐岩并参考动物化石的铀系年代测定,主要含化石的第2层年代应在~100-300ka之间,相当于中更新世晚期到晚更新世早期。由地层堆积、出土石制品和动物化石等埋藏情况分析,莲花洞不是人类的长期居址,很可能只是一处临时停留地。  相似文献   

3.
江苏镇江莲花洞动物化石铀系年代   总被引:3,自引:0,他引:3  
莲花洞位于镇江市南约 6km的白龙岗山北坡 (原在丹徒县境内 ) ,地理座标 119°2 4′E ,32°10′N。白龙山为宁镇山脉东支 ,走向近东西 ,顶峰海拔 118m。溶洞发育于三迭纪青龙组灰岩 ,洞口标高约 35m。 1981年 ,南京博物院等单位[1 ] 对该地点进行发掘 ,获哺乳动物化石16种 ,其中人牙化石 1枚。洞内堆积自下而上被分为 4层 ,其中第 2层为棕红色亚粘土 ,含石灰岩碎块、铁锰质结核和大量动物化石。发掘者根据动物化石中有 3个绝灭种 ,将该地点定在“晚更新世或晚更新世早期” ,人牙化石被认为属于智人。韩德芬等[2 ] 认为莲花洞在我国晚…  相似文献   

4.
对贵州省贵定地区长兴期腕足动物群进行了系统研究,建立了该地区长兴阶的4个腕足动物组合,并对各个组合的古生态特征进行了初步探讨。描述了腕足动物化石8属9种,其中2新属7新种。  相似文献   

5.
《化石》2011,(1):9-9
生活于7亿至5.7亿年前的一大群软体躯的多细胞无脊椎动物,最先由斯普里格(R.C.Sprigg)于1947年在澳大利亚南部的埃迪卡拉地区的庞德石英岩(Pound Quartzite)中发现。包括3门,15属,35种低等无脊椎动物。  相似文献   

6.
同号文 《人类学学报》2002,21(4):325-336
Recently the vertebrate faunal succession established by von Koenigswald in 1930s was replaced by a new one which was proposed by Sondaar (1984), which arose some problems in regional correlations, because the relationship between the two schemes are not very clear,and some of the guide fossils mentioned by von Koenigswald were not included in the new scheme. In China, we used to compare the Jetis Fauna with Gongwangling fauna, Trinil Fauna with Zhoukoudian and Yanjinggou Faunas, but at the present time, both of the faunal names were given up. The new dating works changed the old scheme of faunas, the oldest mammalian fossil record in Java is only 1.5 Ma, which had been thought to be Middle Pliocene in the past half century. The new results from the dating works are not well correlated yet with the turnover of faunal assemblages. It's sure that the Java Faunas have close relationship with that of China, but how we can correlate them precisely is still to be done in the future.
  相似文献   

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贵州盘县大洞遗址动物群的研究   总被引:2,自引:2,他引:2  
张镇洪  刘军 《人类学学报》1997,16(3):209-220
本文记述盘县大洞遗址1992-93年发现的哺乳动物化石共计43种,属于中更新世中,晚期生活在云贵高原和东南亚丘陵地区的过渡地带的动物群,动物群的主要成员为华南地区大熊猫-剑齿象动物群成分的,但也有一些云贵高原的土著种类,它反映一种以亚热带生态以为主,其间有若干次干,凉气候波动的环境。  相似文献   

8.
在孤峰组底部发现了包括Mesogondolella nankingensis在内的牙形刺动物群。Gondolella serrata Clark et Ethington,1962是Mesogondolella nankingensis(Jin,1960)的同义名,Mesogondolella nankingensis已被北美学者推荐为瓜达洛坪统底界的标志化石。因Mesogondolella na  相似文献   

9.
高进 《化石》1992,(2):32-32
晚元古代埃迪卡拉动物群(Ediacara fauna)的绝灭是目前所确定的最早的大规模绝灭。其原因尚不清楚,具体的绝灭过程也未见论述。对此本文作一初步探索。埃迪卡拉动物是最早的后生动物,首先发现于澳大利亚南部阿第雷德地区的埃迪卡拉附近。这个动物群中的主要动物有腔肠动物、水母类、蠕虫动物、海鳃类、节肢动物及分类不明的动物等(见附图)。与它相当的动物化石在世界各地广为分布,我国陕西的宁强和黑龙江的鸡西也有发现。埃迪卡拉动物群的生存年代为6—7亿年前,这正是南沱冰期以后与罗圈冰期出  相似文献   

10.
根据近年来国际上海相第三纪地层及所含生物研究的进展、海陆相地层对比的精确、划分方案的变化,蒙古三达河组的地质时代应为早渐新世,而不是原来认为的中渐新世。中国乌兰诺塔尔动物群中已研究过的21属哺乳动物化石,有17属与三达河动物群共有,占马兰塔塔尔动物群总数的81%;33个种中与后者相同或相似的有14个,占43%。这种相似性表明乌兰塔塔尔动物群的时代也应为早渐新世,而不是原来认为的中渐新世。  相似文献   

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Abstract

Human teeth erupt during root growth but few studies report the relationship between fractions of root development and eruption levels. The aim of this study was to assess root stages of deciduous and early erupting permanent teeth (maxillary and mandibular central incisors and first molars) at eruption levels and relate this to root fraction and tooth length. The sample consisted of 620 modern human skeletal remains with developing teeth. Tooth stage (based on Moorrees crown and root stages) and eruption levels of all developing teeth were assessed where possible. Tooth length of isolated teeth was measured. The distribution of root stage at eruption levels was calculated. Results showed that root stage at alveolar eruption was less variable than at partial eruption. Most teeth (72% of 138) at alveolar eruption were at root a quarter (R¼) whereas teeth at partial eruption were at R¼ or root half (R½) (38 and 50% of 128 respectively). These findings suggest that the active phase of eruption is probably a rapid process and occurs during the first half of root growth.  相似文献   

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本文记述福建省境内首次发现的出自地层的古人类化石。标本为晚期智人的一枚左下第一臼齿。根据对化石产地的地质、地貌以及伴生哺乳动物化石种类的分析,表明其时代为晚更新世晚期。  相似文献   

14.
陕西蓝田锡水洞中产出许多中更新世哺乳类化石,这些标本残破者较多。对880件标本作埋藏学分析后发现:其中只有376件较完好,可供分类鉴定;根据身体大小,这些可鉴定的标本可分为较大、中等及较小3类,大个体动物的骨骼保存越破碎;98%的骨骼的风化级别为0—2,只有2%的风化较强,达3—5级;属草食动物的骨骼占97.6%,而食肉类的仅占1.7%;以青羊为例,死亡年龄以中青年为主,为灾变死亡;头骨残破,肢骨近端破碎严重,而远端肢梢几乎完好。种种迹象表明,与古人类活动有关。当时居住在锡水洞中的古人类以草食动物为主要猎取对象,敲骨吸髓,还可用骨作器。  相似文献   

15.
陕西洛南人牙化石及其地质时代   总被引:10,自引:2,他引:10       下载免费PDF全文
薛祥煦 《人类学学报》1987,6(4):284-288
在陕西省洛南县洛河左岸洞穴中,发现一古人类上臼齿,其特点与郧县人牙化石很相似。与人牙化石共存的有大熊猫和獏。后二者比华南洞穴中常见的同类化石明显小,比广西柳城巨猿洞中的小型者要大。从化石特点分析,洛南人牙化石及其所在沉积层的时代为中更新世早期(也有早更新世晚期的可能)。  相似文献   

16.
《L'Anthropologie》2016,120(2):175-208
The first Vanuatu archaeological site discovery dates back to the 1960s, then the scientific and archaeological knowledge of this archipelago have increased. Nevertheless, the human activities–palaeoenvironmental changes relation in Vanuatu is still a matter of debate. In order to better determine this relation, reviewing the literature on past and actual environment is needed. This paper presents here a state of knowledge on Vanuatu geology, climate, biodiversity and archaeology, from the mid-Holocene to our present-day. The young archipelago results from strong volcanic and tectonic activity, due to the active subduction zone between Australian and Pacific plates. The atmosphere–ocean interactions determine the wet and dry seasons. Fauna and flora are principally derived from Southeast Asia. The occurrence of several species and subspecies endemic to the archipelago, if not to some islands, is probably due to the Vanuatu isolated location, the size of the islands and the climatic gradient between north and south. The first human populations reached the archipelago around 3200 yr BP. The Lapita culture, characterized by decorated potteries, is shared across the whole Vanuatu between 3200 and 2900 yr BP. After 2900 yr BP, cultures differ from one island to another. After 600 yr BP, the Polynesian culture dominates in Vanuatu.  相似文献   

17.
庐山蛾类区系研究   总被引:1,自引:0,他引:1  
方育卿 《动物学研究》1986,7(2):147-154
庐山,地处中亚热带北沿,北纬29.35°,东经115.59°,属亚热带东部季风区域。庐山襟江带湖,雨量充沛,植物种类繁多,种子植物有1800余种,隶属158科642属。因此,庐山蛾类也较丰富。笔者于1975年5月开始,对庐山蛾类进行了调查,共鉴定出蛾类455种。现将庐山蛾类区系报告如下。 区系分析 庐山蛾类已鉴定出32科340届455种。区系情况如表。 从表可以看出:  相似文献   

18.
The Orce region has one of the best late Pliocene and early Pleistocene continental paleobiological records of Europe. It is situated in the northeastern sector of the intramontane Guadix-Baza Basin (Granada, Andalusia, southern Spain). Here we describe a new fossil hominin tooth from the site of Barranco León, dated between 1.02 and 1.73 Ma (millions of years ago) by Electron Spin Resonance (ESR), which, in combination with paleomagnetic and biochronologic data, is estimated to be close to 1.4 Ma. While the range of dates obtained from these various methods overlaps with those published for the Sima del Elefante hominin locality (1.2 Ma), the overwhelming majority of evidence points to an older age. Thus, at the moment, the Barranco León hominin is the oldest from Western Europe.  相似文献   

19.
大熊猫——剑齿象动物群的聚类分析   总被引:1,自引:0,他引:1  
<正> 中外学者对我国南方石灰岩溶洞出土的第四纪哺乳动物化石(按照以往的习惯,又可总称为广义的“大熊猫——剑齿象动物群”)已经进行了长期的、广泛的研究。最近有人(计宏祥,1977;黄万波,1979)对这段历史作了详尽的总结。从历史的回顾中可以看到,随着化石材料的不断积累,华南溶洞出土的第四纪哺乳动物化石已由单一  相似文献   

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