Click to see the original definition of «地质年代» in the Chinese dictionary.
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Geological age
地质年代
The geological age is the time unit used to describe the earth's historical events, usually used in geology and archeology. ... 地質年代是用來描述地球歷史事件的時間單位，通常在地質學和考古學中使用。...
Geochronology The time and sequence of formation of rocks in different years from the crust. Relative geology and radiometry dating points. The relative geologic age only shows the new-old order of rock production time, such as Paleozoic, Mesozoic and Cenozoic. The years of radiometry clearly specify the number of years rock was formed and are determined by the amount of radioisotope metamorphic product in the rock formation. See the table below. [ht6h] Geological age The epoch Chronology Symbol Isotope Age Beginning time Duration of biological development Phanerozoic Cenozoic kz Quaternary q1616 Early human ancestors appear. New Tertiary n23214 Plants and animals are nearly modern. Common freshwater algae. Small planktonic foraminifera thrives. Mammals become larger. Old Tertiary e6542 angiosperms prosperous. The sea is dominated by currency worms, molluscs and six-pointed corals. Mammals develop rapidly. Mesozoic mz Cretaceous k13570 Later this period, a large number of angiosperm found. Foraminifera flourished. Amethyst and arrow stone gradually disappeared. Reptiles to the latter sharp decline. Jurassic j20570 true fern, cycads, ginkgo and coniferous and other prosperity. Arrow stone and ammonite flourished. Great reptile development. Birds appear. Triassic t25045 further development of gymnosperms. Brachiopoda reduction. Amethyst and flap gill development. Fangs extinct. Crawling development. Mammals appear. Age of the Chronicle Symbol Isotope Age Beginning time Duration of the stage of biological development Phanerozoic Paleozoic pz Permian p29040 to late, woody pine, reed, seed fern, Kodak and other tended to decline, gymnosperms such as conifer and so on Start to develop. Ammonites, Brachiopods continue to develop. The end of this century, coral coral, bed coral, trilobites, b12f @ 嗑 off. Carboniferous c35565 true fern, woody pine, wood, seed fern, Kodak and other large prosperity. Pen stone decline. Corals, b12f @ 唷 ⑼ 笞 憷 芏 芏 A 狡 芾 A step further development. Reptiles appear. Devonian d41055 bare ferns in the early boom, metaphase, ferns and primitive gymnosperms appear. Brachiopods and coral development. The original ammonite appears. Insects and primitive amphibians were initially discovered. Fish development. To late, no jaw tends to extinction. Silurian s43828 in the end, naked ferns began to appear. Brachiopods and coral prosperity. Trilobite and pen stone is still flourishing. No jaw development. To late, primitive fish appear. Ordovician o51072 algae widely developed. Marine invertebrates such as trilobites, pen-stone, cephalopods, brachiopods, echinoderms and other very prosperous, plate plover appear. Find reliable coral corals. Algae development. Cambrian ∈ 57070 red algae, green algae began to flourish. Compared with the records of Proterozoic fossils, some species of invertebrates, especially Trilobites, began to flourish. Brachiopods, ancient beast animals and other development. Proterozoic pt no universal adoption of the program 25001930 Cyanobacteria and bacteria began to flourish. To the end, invertebrates appear. Archean ar40001500 late there are bacteria and low cyanobacteria exist, but the reliable fossil record. 地质年代 地壳上不同年代的岩石在形成过程中的时间和顺序。有相对地质年代和放射测定年代之分。相对地质年代只说明岩石在生成时间上的新老顺序，如古生代、中生代和新生代等。放射测定年代则明确说明岩石生成距今的年数，根据岩层中放射性同位素蜕变产物的含量加以测定。详见下表。[ht6h]地质年代表宙代纪符号同位素年龄开始时间持续时间生物发展的阶段显生宙新生代kz第四纪q1616本纪初期人类祖先出现。新第三纪n23214植物和动物接近现代。淡水藻常见。小型浮游有孔虫繁盛。哺乳类形体变大。老第三纪e6542被子植物繁盛。海中以货币虫、软体动物和六射珊瑚为主。哺乳类发展迅速。中生代mz白垩纪k13570本纪后期，被子植物大量发现。有孔虫兴盛。菊石和箭石渐趋绝迹。爬行类至后期急剧减少。侏罗纪j20570真蕨、苏铁、银杏和松柏类等繁荣。箭石和菊石兴盛。巨大的爬行类发展。鸟类出现。三叠纪t25045裸子植物进一步发展。腕足类减少。菊石和瓣鳃类发育。迷齿类绝迹。爬行类发展。哺乳类出现。宙代纪符号同位素年龄开始时间持续时间生物发展的阶段显生宙古生代pｚ二叠纪p29040至晚期，木本石松、芦木、种子蕨、科达树等趋于衰落，裸子植物如松柏类等开始发展。菊石、腕足类等继续发展。本纪末，四射珊瑚、床板珊瑚、三叶虫、b12f＠嗑灭。石炭纪c35565真蕨、木本石松、芦木、种子蕨、科达树等大量繁荣。笔石衰亡。珊瑚、b12f＠唷⑼笞憷嗪芏唷Ａ狡芾嘟一步发展。爬行类出现。泥盆纪d41055在早期裸蕨类繁荣，中期后，蕨类植物和原始裸子植物出现。腕足类和珊瑚发育。原始菊石出现。昆虫和原始两栖类最初发现。鱼类发展。至晚期，无颌类趋于绝灭。志留纪s43828在末期，裸蕨类开始出现。腕足类和珊瑚繁荣。三叶虫和笔石仍繁盛。无颌类发育。至晚期，原始鱼类出现。奥陶纪o51072藻类广泛发育。海生无脊椎动物如三叶虫、笔石、头足类、腕足类、棘皮动物等非常繁盛，板足鲎类出现。发现可靠的四射珊瑚。钙藻发育。寒武纪∈57060红藻、绿藻等开始繁盛。与元古代化石记录相比，若干门类无脊椎动物，尤其是三叶虫等开始繁荣。低等腕足类、古杯动物等发育。元古宙pt尚无普遍采用的划分方案25001930蓝藻和细菌开始繁盛。至末期，无脊椎动物出现。太古宙ar40001500晚期有菌类和低等蓝藻存在，但可靠的化石记录不多。
Click to see the original definition of «地质年代» in the Chinese dictionary.
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The translations of 地质年代 from Chinese to other languages presented in this section have been obtained through automatic statistical translation; where the essential translation unit is the word «地质年代» in Chinese.
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FREQUENCY OF USE OF THE TERM «地质年代» OVER TIME
The graph expresses the annual evolution of the frequency of use of the word «地质年代» during the past 500 years. Its implementation is based on analysing how often the term «地质年代» appears in digitalised printed sources in Chinese between the year 1500 and the present day.
Examples of use in the Chinese literature, quotes and news about 地质年代
EXAMPLES
10 CHINESE BOOKS RELATING TO «地质年代»
Discover the use of 地质年代 in the following bibliographical selection. Books relating to 地质年代 and brief extracts from same to provide context of its use in Chinese literature.
