The origin of life is still a poorly understood process, but it is thought to have occurred about 3.9 to 3.5 billion years ago during the hadean or archean eons on a primordial earth that had a substantially different environment than is found at present.

對于生命起源，我們?nèi)灾跎倮怯迅稍谙吖劭矗菗?jù)猜測生命起源于距今35億年到39億年前，原始地球的冥古代或太古代在线麻豆视频，當(dāng)時地球上的環(huán)境跟現(xiàn)在大不相同粉嫩极品国产在线播放。

In the geological time scale, there are five eras , the archeozoic which means "beginning life", the Proterozoic which means " fore life"

在地質(zhì)年代表中共劃分為5個代欧美性XXXX极品HD欧美风情，太古代的意思是"生命的開始"国产视频福利导航。元古代意即"生命之前"

Usually the archeozoic and Proterozoic eras are grouped together and referred to as Precambrian in age. Precambrian rocks have been intensely deformed, metamorphosed and intruded, and are relatively barren of fossil s.

通常太古代和元古代被歸在一起而稱作前寒武紀(jì)，前寒武紀(jì)的巖石多遭受強烈變形黄色片在线视频、變質(zhì)或被巖漿巖侵入日韩欧美视频在线看，巖石中缺少化石久久偷拍综合。

Usually the archeozoic and Proterozoic eras are grouped together and referred to as Precambrian in age. Precambrian rocks have been intensely deformed, metamorphosed and intrude d, and are relatively barren of fossils.

通常太古代和元古代被歸在一起而稱作前寒武紀(jì)五级黄色毛片，前寒武紀(jì)的巖石多遭受強烈變形、變質(zhì)或被巖漿巖侵入国产一级黄色A片,色欲，巖石中缺少化石。

Usually the archeozoic and Proterozoic eras are grouped together and referred to as Precambrian in age. Precambrian rocks have been intensely deformed, metamorphosed and intruded , and are relatively barren of fossils.

通常太古代和元古代被歸在一起而稱作前寒武紀(jì)亚洲美女黄又黄免费观看网站视频，前寒武紀(jì)的巖石多遭受強烈變形男人插女人逼视频黄色大片、變質(zhì)或被巖漿巖侵入最真实的偷拍网，巖石中缺少化石。

Recently komatiite with a typical spinifex texture has been discovered at Sujiagou Village, Dabu Township, Mengyin County, Shandong Province, which further verifies that western Shandong is one of the most typical Archean greenstone belt in the North China platform and even in the world and provides new information for the research on the Archean greenstone belt and its mineral resources in western Shando...

最近欧美三级日韩精选，在蒙陰縣坦埠鎮(zhèn)蘇家溝村發(fā)現(xiàn)的具典型鬣刺結(jié)構(gòu)科馬提巖东京热资源，進一步證實了魯西地區(qū)是華北地臺上乃至世界上最典型的太古代綠巖帶之一，為魯西地區(qū)太古代綠巖帶及其礦產(chǎn)的研究提供了新的信息老太婆性爱。

The growth of the continental crust of southeastern China has been discussed based on the compilation of Nd isotopic model ages of metamorphic basement and granitoid rocks from the region.

中國東南變質(zhì)基底巖石及各時代花崗巖的Nd同位素模式年齡的統(tǒng)計研究結(jié)果表明欧美爆乳激情A片，該地區(qū)太古代—古元古代陸殼以橫向增生方式形成，顯生宙表現(xiàn)為局部的垂向增生黄色日逼。

Precambrian time is now divided into three eons: Hadean, from the earth ' s origin to about 3900 Ma; Archaean, 3900-2390Ma; and Proterozoic, 2390-570 Ma (the Cambrian marks the start of the Phanerozoic eon, which extends to the present day).

現(xiàn)在將前寒武紀(jì)分為三個時代国产一级视频精品；冥古代高清狼友网，從地球誕生到約39億年前；太古代国产精品亚洲獵奇在线观看，39億年前—23.9億年前，以及原生代，23.9億年前—5.7億年前（寒武紀(jì)標(biāo)志顯生代的開始黄色视频免费观看无限在线网站视频黄色视频，延續(xù)至今）。

Ccording to the regional geological survey on scale of 1∶50 000 belonging to the second round in Xiaoqinling and Xiaoshan regions,Late Archaeozoic basement metamorphic rock series of two regions have all included the metamorphic supracrustal rock series and metamorphic granite series.

小秦嶺崤山地區(qū)晚太古代基底變質(zhì)巖系劃分與對比喻積賢①摘要小秦嶺、崤山地區(qū)第二輪1∶5萬區(qū)調(diào)查明，兩地區(qū)晚太古代基底變質(zhì)巖系均包括變質(zhì)表殼巖系和變質(zhì)花崗巖系亚洲精品A片。

The data show the following ages: 1894±17 Ma and 1847±59 Ma for garnet pyroxenite of the Tiantangshan Group complex, indicating a Paleoproterozoic age; 1462±28 Ma for the metabasic volcanic rocks of the Yunkai Group complex, indicating the presence of fragments of the Meso- and Neoproterozoic oceanic crust in the Yunkai area; 906±24 Ma for the granitic gneiss intrusion is, which should be the product of the global Grenville collisional orogeny occurring around 1000 Ma BP. In addition, an inherited detrital zircon age of 2702±13 Ma was also obtained, which is the oldest age in the Yunkai area and even in Cathaysia, proving the presence of Neoarchean continental crustal material in Cathaysia.

獲得天堂山巖群石榴輝石巖的形成年齡為1894Ma±17Ma和1847Ma±59Ma，表明其時代為古元古代黄色视频网；云開巖群洋中脊型變質(zhì)基性火山巖的噴發(fā)年齡為1462Ma±28Ma亚洲中文字幕在线第一页，證明該地區(qū)存在中元古代的古洋殼殘片；獲得花崗質(zhì)片麻巖的侵入年齡為906Ma±24Ma亚洲一区二区5566在线，應(yīng)為1000Ma前后發(fā)生的全球性Grenville期造山作用的產(chǎn)物国产一区二区性交影视，并獲得2702Ma±13Ma的繼承碎屑鋯石年齡，這是云開地區(qū)乃至華夏古陸目前獲得的最古老年齡国产操视频网，證明華夏古陸曾存在新太古代陸殼物質(zhì)。

archean：太古代

帶狀鐵巖(Banded ironstone或Banded iron)是由薄層磁鐵礦或赤鐵礦等氧化鐵反覆堆疊,并夾雜帶狀頁巖或燧石所組成,其構(gòu)成的巖層稱為帶狀鐵巖層(Banded ironstone formations,簡稱BIFs),主要形成年代以太古代(Archean)和元古代早期(early Proterozoic)為主,

Archean craton：太古代克拉通

archean basement 弧形基底 | Archean craton 太古代克拉通 | Archean era 太古代

Archean craton：太古代克拉通,太古代古陸

"Archaias","原始蟲屬,古蟲屬(有孔蟲類,E2-Q)" | "Archean craton","太古代克拉通,太古代古陸" | "archegonial chamber","藏卵室"

Archeozoic：太古代的

arched mountains 穹形山 | archeozoic 太古代的 | archeozoic era 太古代

Archeozoic：太古代

元古代(原生代) proterozoic | 太古代archeozoic | 中生代Mesozoic

archeozoic era：太古代

archeozoic 太古代的 | archeozoic era 太古代 | archipelago 群島

Laurentian orogenesis：勞倫造山運動(太古代元古代間)

浪向風(fēng) following wind | 勞倫造山運動(太古代元古代間) Laurentian orogenesis | 勞氏筆石 Loganograptus

Archaean nuclei：太古代陸核

Archaean group 太古界 | Archaean nuclei 太古代陸核 | Archaean 太古代的

archaeozoic：太古代的

archaeopteryx 始祖鳥屬 | archaeozoic 太古代的 | archaian 太古代的

archaeozoic：太古代

aquitard 弱透水層 | Archaeozoic 太古代 | Archean (年代) 太古代的;(地層) 太古界的