- 更多网络例句与始新系的相关的网络例句 [注：此内容来源于网络，仅供参考]
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The phase of rift basin formed the primary source rocks and reservoir and seal. Triassic-Jurassic Pucara Group and Cretaceous Chonta Formation generated a mass of hydrocarbons in Paleocene-Eocene (60-45Ma) and Miocene (15-5Ma), respectively.
盆地内主要的烃源岩及储、盖组合均发育在裂谷盆地阶段，三叠系—侏罗系Pucara群和白垩系Chonta组2套主要烃源岩的排烃高峰期分别是古新世—始新世（距今60～45 Ma）和中新世（距今15～5 Ma）。
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The grain size probability cumulative curves are characterized by the model of single segment with greater change of grain size.
但我们在对济阳坳陷古近系的湖相页岩进行研究时，却在始新统沙河街组中的湖相页岩纹层中发现了一些零散分布的风成粉砂沉积。
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Of, relating to, or designating the geologic time, rock series, sedimentary deposits, and fossils of the second oldest of the five major epochs of the Tertiary Period, extending from the end of the Paleocene to the beginning of the Oligocene, and characterized by the rise of mammals.
始新世的关于或标明第三纪的五个世中第二世的地质时代、岩系段，沉积矿床和化石的，该世由古新世末期到渐新世初期，以哺乳动物的繁盛为特征
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The Green River site is important because it reveals information about the climate during the Eocene and the transitions during the period itself, including the significant faunal change that occurred in North America.
绿河所在地很重要的原因就是他揭示了始新世的温度和转变情况，包括在北美的明显动物系的转变。
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The family is characterized by a primitive protrogomorphous-sciurognathous zygomasseteric structure and pauciserial incisor enamel, but the cheek teeth are precocious in development of hypocone and hypolophid.
共 4属 6种。新科的特征是：始啮型头骨-松鼠型下颌；门齿釉质层散系；颊齿具有发育的次尖和下次脊，后期种类上颊齿的外侧齿尖的唇侧发展成平凹到新月形。
- 更多网络解释与始新系的相关的网络解释 [注：此内容来源于网络，仅供参考]
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neogene：新近系
国际地层委员会(ICS)已将原来的第三系分为古近系(Paleogene)和新近系(Neogene),古近系的含义和原来的下第三系相同,包括了古新统、始新统和渐新统. 古近系的顶、底界线已经确定,顶界年龄为23.03 Ma,底界年龄为(65.5±0.3)Ma.