1时间的划分是怎样的地质年代单位 时间地层单位 宙(eon) 宇(eonothem) 代(era) 界(arethem) 纪(period) 系(system) 世(epoch) 统(series) 地壳上不同时期的岩石和地层,(时间表述单位:宙、代、纪、世、期、阶;地层表述单位:宇、界、系、统、组、段).在形成过程中的时间(年龄)和顺序.谁有具体的时间图...
世 shì life; age; generation; era; world; lifetime; epoch; descendant; noble; (Chinese surname) 代 dài to substitute; to act on behalf of others; to replace; generation; dynasty; age; period; (historical) era; (geological) eon 年代 niándài a decade of a century (e.g. the Sixtie...
:a large division of geologic time usually shorter than an eon Paleozoicera ERA 2 of 2 abbreviation 1 earned run average 2 Equal Rights Amendment Synonyms Noun age day epoch period time See All Synonyms & Antonyms in Thesaurus Choose the Right Synonym forera ...
a period marked by distinctive character or reckoned from a fixed point or event synonyms: epoch see more noun a major division of geological time; an era is usually divided into two or more periods synonyms: geological era see more Pronunciation US /ˈɛrə/ UK /ˈɛrə...
Age, Epoch, Era, EonThe short story "Age, Epoch, Era, Eon" by Stephen Tuttle is presented.Tuttle, StephenWestern Humanities Review
1.a period of time considered as being of a distinctive character; epoch 2.an extended period of time the years of which are numbered from a fixed point or event:the Christian era. 3.a point in time, esp one beginning a new or distinctive period:the discovery of antibiotics marked an ...
has continued inexorably to the present interglacial climatic period. It is to be noted that a unique feature of the Cenozoic was the development ofglaciationon the Antarcticcontinentabout 35 million years ago and in the Northern Hemisphere between 3 million and 2.5 million years ago. Glaciation le...
PeriodEpochAgeRange (Mya)Duration (My) Cretaceous K Upper/late K2 Maastrichtian k6 70.6 - 65.5 5.1 Campanian k5 83.5 - 70.6 12.9 Santonian k4 85.8 - 83.5 2.3 Coniacian k3 89.3 - 85.8 3.5 Turonian k2 93.5 - 89.3 4.2 Cenomanian k1 99.6 - 93.5 6.1 Lower/early K1 Albian b6 112.0 - 99.6...
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The Phanerozoic is a geological eon that constitutes the Earth's current period (the Quaternary) and era (the Cenozoic). The Paleozoic Era began about 541 million years ago, following the end of the earlier Proterozoic Eon.Answer and Explanation: ...