Temperatures during the Archean were at least as high as they are today, despite the weaker sun, he says.

他說(shuō)1314国产在线视频，盡管當(dāng)時(shí)的陽(yáng)光較弱免费看黄的视频，太古代期間的溫度至少跟現(xiàn)在一樣高。

Various geochronometric methods have been applied to dating of important geologic events in complex Archean terranes.

在復(fù)雜的太古代地體的重要地質(zhì)事件定年中已采用了多種地質(zhì)年齡測(cè)定方法一级A黄毛片。

The early Archean supracrustal rocks in this region are composed of the meta-volcanic rocks and metasedimentary rocks.

本區(qū)早太古宙上殼巖是由變質(zhì)火山巖和變質(zhì)沉積巖組成免费成年人网址。

The fault zone perhaps originated at later Archean and controlled the formation of the two greenstone belts.

本斷裂帶可能在晚太古代形成雛形，并控制了兩期綠巖帶的形成国产尤物电影在线观看网站免费。

The genesis of Archean granitoids are a long controversy problem.

太古宙花崗巖類(lèi)的成因是地學(xué)界爭(zhēng)論頗久的問(wèn)題www.zachiew.com。

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(yè)巖或燧石所組成,其構(gòu)成的巖層稱(chēng)為帶狀鐵巖層(Banded ironstone formations,簡(jiǎn)稱(chēng)BIFs),主要形成年代以太古代(Archean)和元古代早期(early Proterozoic)為主,

archean：太古宙

太古宙(Archean)是最古老的地史時(shí)期.從生物界看.這是原始生命出現(xiàn)及生物演化的初級(jí)階段.當(dāng)時(shí)只有數(shù)量不多的原核生物.他們只留下了極少的化石記錄.從非生物界看.太古宙是一個(gè)地殼薄.地?zé)崽荻榷?火山-巖漿活動(dòng)強(qiáng)烈而頻繁.巖層普遍遭受變形與變質(zhì).大氣圈與水圈都缺少自由氧.形成一系列特殊沉積物的時(shí)期,

archean：太古代的

archdukedom 大公的地位 | Archean 太古代的 | arched 弓形的

archean：[地質(zhì)]太古代的

aluminum [化]鋁 | Archean [地質(zhì)]太古代的 | archeology 考古學(xué)

archean stratum：太古代層

archaeocyte 原始細(xì)胞 | archean stratum 太古代層 | archecyte 原始細(xì)胞