中国恐龙化石种类最多:有大片中生代岩石     

《地理教学》2015,(2):60

参考消息网11月15日报道英媒称,在中国,寻找恐龙化石只是近几十年才开始的。但在中国境内确定的恐龙种类已超过其他任何国家。据英国《经济学家》周刊网站11月14日报道,地上露出一块略带桃色的巨型股骨,长度超过了一个人的身高。这个地区大量散落着一种鸭嘴龙的椎骨、腿骨、肱骨和头盖骨的化石。过去7000万年,这种鸭嘴龙及其他很多种类的恐龙一直埋在这里。如今,位于中国东部山东省诸城的这片遗址被称为"恐龙谷",这里至今发现了1万多块恐龙化石。在中国,寻找恐龙化石只是近  相似文献   

全球煤炭需求:五年后90亿吨?     

《西部资源》2015,(1):61

<正>据英国《卫报》报道,国际能源署近日发布报告表示,尽管在秘鲁利马举行的联合国气候变化大会呼吁停止使用化石燃料,但全球煤炭需求有增无减,预计到2019年将达到创纪录的90亿吨。本次利马气候大会提出到2050年实现温室气体零排放,得到了一些国家的支持。会议还围绕是否强制各国在2015年春季前宣布自己的减排计划展开了激烈辩论,但最终达成的协议仅要求各成员国在2015年3月31日前公布排放计划。  相似文献   

贵州省“双管齐下” 开展古生物化石保护工作     

《西部资源》2015,(2):64

<正>贵州省国土资源厅为贯彻落实《古生物化石保护条例》(国务院令第580号)和《古生物化石保护条例实施办法》(国土资源令第57号),贵州省"双管齐下",通过开展重点保护古生物化石登记和打击违反古生物化石保护行为专项行动,加强对古生物化石的保护。一方面,省财政安排361万专项资金,利用3个月(3月至5月)的时间,在全省范围内开展重点保护古生物化石集中登记,对象为全省范围内各类古生物化石收藏单位和个人,且登记不涉及化石所有权的变更。以此建立全省档案和数据库,并为建立全国数据库提供信息支持。另一方面,在全省范围内开展打击违反古生物化石保护  相似文献   

澳大利亚能源政策及启示     

殷俐娟 《国土资源》2004,(5):50-51

澳大利亚拥有传统的能源资源和新能源技术。预计澳大利亚将继续依赖化石燃料能源。能源采集、供应和利用，无论对海洋、生物多样性以及土地盐份等等，还是对文化的和景观的环境都有一定程度的影响。因此，能源政策的制定与实施，特别是对能源供应、终端消耗、燃料替代品、供应方式的创新开发效率等都有影响的政策的制定与实施，对澳大利亚的经济和生活质量都有明显的作用。  相似文献   

新疆库车河地区三叠－侏罗系干酪根显微组分与古环境及古气候   总被引：8，自引：1，他引：8       下载免费PDF全文

黄克难  詹家祯  邹义声  王智  周春梅  肖继南 《古地理学报》2003,5(2):197-208

根据库车河剖面三叠－侏罗系干酪根显微组分的分布特点，将干酪根显微组分划分为５种组合和12种亚组合，结合沉积特征等资料推测每一种亚组合所对应的沉积环境。根据孢粉化石母体植物的生态习性推测三叠－侏罗系沉积时期古气候的变化规律是：由半干旱（俄霍布拉克组）→半潮湿（克拉玛依组下段）→潮湿（克拉玛依组上段－克孜勒努尔组下段）→半干旱、半潮湿（克孜勒努尔组上段－恰克马克组）→半干旱（齐古组、喀拉扎组）；由热带、亚热带型气候（俄霍布拉克组－塔里奇克组）→亚热带－暖温带型气候（阿合组－克孜勒努尔组）→亚热带型气候（恰克马克组－喀拉扎组）。根据干酪根显微组分、沉积特征等资料推测俄霍布拉克组、克拉玛依组上部标志层段、黄山街组二－四段中、下部、阳霞组上部标志层段和恰克马克组为该区三叠－侏罗纪五个主要的湖泊（滨浅湖、半深湖－深湖）发育期；齐古组为洪泛湖泊发育期；塔里奇克组、阳霞组下段和克孜勒努尔组为三个主要的沼泽（以河沼为主，如岸后沼泽、分流间沼泽等）发育期。  相似文献   

Features and buried environment analysis of fossils specimens in Shuangmiao region of Kazuo County in Liaoning Province     

YAO Yonglong 《中国地质调查》2014,7(3):61-66

In order to ascertain the species, quantity and occurrence layers of the fossils specimens in Shuangmiao region of Kazuo County, the authors harvested lots of Mesozoic fossils such as reptiles,birds,fishes and plant species, through geological surveys, section measurements and excavations. According to the comparison between the measured section and typical section, it is concluded that the fossil-bearing stratum is the No.1 Member of Jiufotang Formation, which belongs to the lacustrine facies. This research enriches the Mesozoic fossils data of Western Liaoning Province.  相似文献   

Paliurus (Paliureae,Rhamnaceae) from the Miocene of East China and its Macrofossil-based Phylogenetic and Phytogeographical History     

LI Xiangchuan  WANG Haofei  LENG Qin  XIAO Liang  GUO Junfeng  HE Wenlong 《《地质学报》英文版》2014,88(5):1364-1377

The extant genus Paliurus Miller is divided into P. ramosissimus and P. spina-christi groups and is diagnostically characterized by distinctive orbicular-winged fruits with a trilocular （or often bilocular） ovary and basally triveined leaves with a subentire to serrate margin. Here, structurally preserved winged fruits and associated compressed leaves of Paliurus （Paliureae, Rhamnaceae） are reported from the Middle-Upper Miocene Shengxian Formation of Tiantai, Zhejiang, eastern China. The fruits can be identified as Paliurus microcarpa Xiang-Chuan Lisp. nov., the diagnostic characters of external morphology and anatomy of which differ from those of both extant and fossil generic members; the leaves can be designated as Paliurus sp. The species based on winged fruits, P. microcarpa, might represent an ancient intermediate link exclusively known across the P. ramosissimus and P. spina-christi groups, showing a closer affinity to the P. ramosissimus group based on the resemblant smaller fruits with a narrower wing, and to the P. spina-christi group based on the similar wing structure and texture, respectively. Morphological analyses of the present and previous fossil fruit records around the world indicate that diversification of Paliurus had begun in northern transpacific regions by the Late Eocene. The macrofossil records, i.e., fruits and leaves of Paliurus globally when projected on paleoenvironmental maps in view of changing continental positions through time （from Eocene to Miocene） display that the past distribution of the genus was much wider than the present and belongs to a tropical and warm temperate realm of the Northern Hemisphere. Therefore, the modern restricted disjunction in tropical and warm temperate regions of East Asia and South Europe （even eastwards West Asia） might represent glacial refugia for some of the generic ancient lineages to survive severe cold at least since the terminal Pliocene.  相似文献   

Skeletal Microstructures of the Chiton Ischnochiton hakodadensis and a Comparison with the Cambrian Halkieria     

ZHANG Xiaochuan  YAO Jinxian 《《地质学报》英文版》2014,88(5):1378-1387

Halkieria is an Early Cambrian fossil genus with proposed phylogenetic affinities ranging from stem group lophotrochozoan to stem-group aculiferan. Skeletal similarities are often cited as evidence in support of a mollusk interpretation for Halkieria and related Cambrian fossils. The skeletal microstructures of the polyplacophoran mollusk （chiton） Ischnochiton hakodadensis, which bears perinotum elements resembling sclerites of halkieriids and other coeloscleritophoran small shelly fossils （SSFs）, were studied to evaluate the interpretations. There are both similarities and differences between chiton skeletal structures and halkieriid sclerites： 1） the head valve of L hakodadensis and the dorsal shell of Halkieria evangelista share a similar pattern of fine concentric growth lines, but halkieriid dorsal shells lack other polyplacophoran valve characteristics, including V-shaped indentation, radiate ribs; 2） the arrangement of I. hakodadensis perinotum elements in three zones is somewhat similar to the arrangement pattern of halkieriid sclerites; 3） the inner perinotum scales of L hakodadensis （-200 μm in diameter） have a base and a blade, remarkably similar in morphology to halkieriid palmate sclerites （-400 μm in diameter）. However, I. hakodadensis perinotum scales are nearly solid whereas halkieriid sclerites are hollow. These observations add a microstructural dimension to the skeletal comparison between mollusks and halkeriids, and may prove to be useful in resolving the phylogenetic affinity of Halkieria and the Halwaxiidae.  相似文献   

黄土高原南部下河遗址全新世中期的植被与气候:基于木炭化石记录     

孙楠  李小强  尚雪  周新郢  Dodson John 《第四纪研究》2014,(1)

基于黄土高原南部白水县西固乡下河西村下河遗址木炭化石记录的系统分析并结合高精度AMS~(14)C测年,重建了研究区5050~4870cal.aB.P.时段植被特征和古气候要素值。研究结果显示全新世中期沟谷地带发育以栎、青冈为主的阔叶林地,其中包括柿树、枣树等经济型林木。通过所鉴定的10个乔木植物种属的共存因子法分析,获得白水下河地区(35.14°N,109.69°E)5050~4870cal.aB.P.时段的气候要素值。年均温(MAT)为12.9℃,比现在高约1.5℃;年均降水量(MAP)为758.4mm,比现在高约180mm;与现今秦岭南麓东部的陕西镇安地区(33.45°N,109.16°E)的气候环境相当,可能指示了气候带向北纬推移了约1.7°。  相似文献   

陇东地区齐家文化时期木炭化石记录及其指示意义     

李虎  安成邦  董惟妙  王树芝  董广辉 《第四纪研究》2014,(1)

探讨人与植物之间的关系问题是环境考古学研究的重要内容,木炭分析是研究人类利用木材资源的重要研究手段之一。本文对陇东盆地内3个齐家文化时期遗址出土木炭进行分析,研究史前人类对木材的利用状况以及遗址周边的植被状况。结果显示:栎属的出土率为100%,百分含量也最高,是当时人类用作薪柴的最主要的来源;梨属、枣属、樱属等果树的出现反映出史前人类采集遗址周边的野生植物资源作为食物。木材的收集活动发生在遗址周边,影响人类收集木材的主要因素可能为各树种在植被中的丰度。一些亚热带树种的出现显示当时的气候条件可能比现在暖湿。  相似文献