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Mount Tai Rocks (502) 泰山岩
shandong

泰山岩:

    构成泰山山体的泰山群变质岩(旧称泰山杂岩),是世界上最古老的岩石之一。同位素年龄最年长者约26.28亿岁。而在泰山玉皇顶岩体中获得了年龄34亿年的锆石。专家判断,泰山主峰发现的这些超过30亿年的岩石,可能是在泰山形成过程中将更为古老的岩石带上来。

    1907年美国地质学家维里斯和布莱克维尔德,就发表过“泰山杂岩”的研究报告,此后诸多地质学家,对泰山进行了不懈的研究。

    地质工作者认为,在长达20多亿年的漫长岁月里,泰山的形成,大致经历了三个阶段,即:古泰山的形成,海陆沉浮交替,最后成为今日泰山。早在25亿年的太古时期,整个华北地区还是一片汪洋,现在泰山所处的位置,则是一个沉降带;到了太古晚期,在泰山附近发生了强烈的地壳运动即泰山运动,经过褶皱、隆起和变质作用形成了厚度达12公里的泰山群变质岩,并出现了古泰山。经过十几亿年的历史变迁,也就是到了距今约6亿年的古生代初期,古泰山再次沉入大海,并在其上沉积了石灰岩和砂页岩。大约距今4亿年前时,华北地区上升成陆地,不久,泰山逐渐隆起成为一个低矮的丘陵。在距今1亿年左右的中生代后期,地球上发生了燕山运动,这时,覆盖在泰山之上的岩层,在造山运动中被抖落,古老的泰山岩石再次露出地表,形成今日泰山雏形。大约又过了三四千万年,喜马拉雅山运动将泰山继续抬高,到新生代晚期,即3000万年前,泰山基本“出落”成为现今这副摸样。

Copyright: Dxinwei
Type: Spherical
Resolution: 8374x4187
Taken: 30/09/2015
Subida: 19/10/2015
Número de vistas:

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Tags: taian; mount tai; world culture and natural dual heritage
More About shandong

Shandong, ancient place of for the Qi and Lu, located at the east China coast, the Yellow River downstream, the Beijing Hangzhou big canal's north section, the provincial capital supposes in Jinan, in the province the main super city has Jinan, Qingdao, Yantai, Zibo. Western connects the interior, with Hebei, Henan, Anhui, Jiangsu four provinces borders on separately from north to south; Middle high suddenly, Taishan is the throughout peak; The eastern Shandong Peninsula enters Yellow Sea, north separates the Bohai Sea channel and the Liaodong Peninsula relative, surrounds and protects Beijing and Tianjin and Persian Gulf, east separates Yellow Sea and the Korean Peninsula faces one another, the southeast is near depends on broad Yellow Sea, to look out south East China Sea and Japan the chain islands.


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