查询词典 Eocene

The earliest and reliable Castanopsis fossil records date back at least to Eocene, and subfamily Castaneoideae fossil records found from Paleocene, it is indicated that appearance of Castanopsis is not later than Paleocene . All fossil records of Fagaceae and Castanopsis report from the Northern Hemisphere and their main distribution regions are in the Northern Hemisphere . It can be concluded that the Northern Hemisphere is the center of origin of Fagaceae and Castanopsis . However, owing to the discrepancy between fossil data and results of modern botany research as well as scarcity of fossil data from key area, precise center of origin of Castanopsis cannot be inferred.

栲属在地质历史上有着比现在广泛的分布，最早、最可靠的栲属化石记录发现于始新世地层，栗亚科化石在古新世就有发现，化石记录表明栲属起源的时间不晚于古新世，所有的壳斗科及栲属的化石都发现于北半球，现代分布也主要在北半球，壳斗科及栲属起源于北半球可以确认，由于化石证据与现代植物学的研究结果有较大差异以及关键地区化石证据的不足，具体的起源地尚不能肯定。

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。

According to the wide development of the typical warm-phase salt minerals such as primary glauberite and its thin bed in the Qianjiang Formation, it may be inferred that the dry palaeoclimate in the drainage area of the Jianghan Basin during the Late Eocene to Early Oligocene was of warm-dry type, rather than of cold-dry type.

根据潜江组中典型暖相盐类矿物原生钙芒硝及其薄层的广泛发育，可以推断江汉盆地区域在晚始新世－早渐新世潜江组沉积期间，所出现的干旱古气候属于暖旱型而不是寒旱型。

There is a rich manganese micronodules' layer in the bottom of metalliferous claystone at the end of Eocene in central eastern Pacific according to the samples from site 573 of DSDP.

深海钻探573B孔始新世末与渐新世初地层界线处有一层含金属黏土，其底部有一微锰结核富集层。

The age of peripheral monzonitic granite (XTM04-1) is 46.6±0.6 Ma, implying that this granite suite was formed in the ore-forming stage of Eocene.

外围二长花岗岩(XTM04-1) U-Pb SHRIMP年龄的测定值为46.6±0.6 Ma，表明其侵位于成矿时代的始新世。

Nannoplankton Extinction and Origination Across the Paleocene-Eocene Thermal Maximum - Rare plankton became extinct when atmospheric CO2 levels rose abruptly 50 million years ago, whereas those sensitive to ocean acidification caused by the rise survived.

全国首创超微化石及古灭绝-始新世最大热-绝种稀有浮游生物成了当大气二氧化碳水平崛起50000000年前而海洋酸化敏感所致崛起survived.authors：萨j。

During the Cenozoic, the evolution of the sag might be divided into three stages: during the Eocene, because of regional extension effect of the NW-SE-striking, it was a ramp depression controlled by the Cangdong fault; during the Oligocene, it might have subjected to the combined effects of the NW-SE-striking regional extension and the dextral slipping of the NNE-striking deep fracture zone; during the Neocene and the Quaternary, though the regional extension had mainly stopped, the dextral slipping continued. Inside the slip zone, the local, SN-striking extension related to the dextral slipping became more and more apparent.

新生代演化分为3个时期：NW-SE向区域伸展作用，凹陷是一个由沧东断层控制的断坡凹陷；渐新世，凹陷受NW-SE区域伸展和NNE向深断裂带右旋走滑的共同作用；晚第三纪到第四纪，区域伸展作用基本停止，走滑作用仍在继续，由走滑作用导致的SN向局部伸展作用显得更加突出。

The extinction or appearance of these Ostracoda always occurred in a short time interval, and can be correlated locally and globally, so they are of importance in bioeventstratigraphy. This article listed six such biological events in Qaidam Basin and discussed their causes. The extinction of Cetacella reflected temperature decrease at global scale and changes of palaeoclimate zones during the latest Jurassic and the earliest Cretaceous; The rapid decline of Cypridea in the earliest Cretaceous may be a result of the strikes of small planets; at the latest middle-Eocene Austrocypris became extinct, and at Oligocene Hemicyprinotus disappeared. These events related to the changes of the geological conditions at that time. The explosion of Cyprideis at the middle-Miocene was because the rise of Qinghai-Xizang Plateau which resulted in the dry climate and development of salt lakes.

这些水生生物的绝灭或发生均很迅速，在区域或全球范围内均可对比，具有生物事件地层学意义：Cetacella属的绝灭可能是侏罗、白垩纪之交全球性的古气候降温和气候带变化在柴达木盆地的反映；早白垩世之后Cypridea的迅速衰退是地外因素灾变的结果；中始新世晚期的Austrocypris的绝灭、渐新世Hemicyprinotus的绝灭都与当时地质条件的改变存在著内在的联系；中中新世Cyprideis的爆发推断是青藏高原隆升，导致气候乾燥、湖水咸化的结果；而晚更新世晚期1。

Also, the temperatures of surface waters during the Palaeocene/Eocene thermal maximum (approximately 55 Myr ago) appear to have been substantially warmer than previously estimated.

新世纪早期（55百万年前）水表温度比先前估计的也要高。

There are four hydrocarbon source rocks, Palaeocene, Eocene, Oligocene and Miocene.

西湖凹陷发育古新统、始新统、渐新统及中新统四大烃源岩系。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失