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Tag Archives: Eon
地质年代与生命演化历程 [CN]
年表中最大的时间单位是宙(eon),宙下是代(era),代下分纪(period),纪下分世(epoch)。年表虽有时间的概念,当获悉该化石是何宙、代、纪或世的遗物,间接可知道它形成的粗略时间(当然是很粗略的估计值),但年表的时间单位是完全人为划分的,和日历中的年月日不同,它不能使人了解每个宙、代、纪或世经历的准确时间。 “世”下还可细分为“期”(age);“期”下分为“时”(chron)。 年表中各个宙、代、纪和世都有自己的名称,用于描述生物在不同地质时空的发展程度, 一般以首先研究它们时期岩石的地点来命名,现将某些专家所广泛使用的各个时期之名称概述于下。 宙 冥古宙 —– 生命现象开始的时期。 太古宙 —– 初始生物的时期。 元古宙 —– 久远的原始生物的时期。 显生宙 —– 现代生物存在的时期。 代 古生代 —– 古代生物的时期。 中生代 —– 中等进化生物的时期。 新生代 —– 现代生物的时期。 纪 所有的名称都是从英语经由日语引入汉语的。 寒武纪 (Cambrian) —– 取名于拉丁文Cambria,即威尔士。 奥陶纪 (Ordovician) —- 名称来自大不列颠的古老部落 (奥陶部落)。 志留纪 (Silurian) … Continue reading
Posted in History, geography, and biography
Tagged Earth, Eon, Evoluation, geology, History, Human, life
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