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放射虫类

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Important advance are made in the date of slices and superslices:(1) Abundant acritarch and a few radiolarian fossils are collected in the "barren strata" formed by epi-middle metamorphic slices at Gouli, Longshigenggongwu, thus provide data evidence for this set of strata. A series of isotopic dating data (14) showed that the date are between 1 000 Ma and 500 Ma, close to that of the fossils.

在岩片和超岩片时态调查方面取得如下重要进展:(1)在沟里、龙什更公坞等地区的由中浅变质岩岩片构成的"哑地层"中获取较丰富的疑源类和少量放射虫化石,使该套地层从化石方面首次获得了确切的时代证据,并新获一大批同位素年龄数据(14个),年龄值主要分布在1000—500Ma之间,化石时代与同位素测年吻合较好。

Persculptus to Parakidograptus acuminatus Zones, could be recognized during the interval. In addition, the abundance changes of the radiolaria at the Goujiaya and Datangkou sections were coincided with the sea-level changes, and correlatable with the synchorous 5 fluctuations of the sea-level in North America and Africa. So above-mentioned 5 cycles could represent the eustasies during the latest Ordovician to the earliest Silurian.

在这2个剖面上,放射虫丰度变化也表现出相似的规律,与笔石和腕足类的形态、分异度和丰度变化所反应的海平面升降大体一致,和北美、非洲同期海平面的5次波动可以对比,据此指出,以上5次海平面旋回代表了晚奥陶世晚期至志留纪初期全球性海平面变化。

Persculptus to Parakidograptus acuminatus Zones, could be recognized during theinterval. In addition, the abundance changes of the radiolaria at the Goujiaya and Datangkou sections werecoincided with the sea-level changes, and correlatable with the synchorous 5 fluctuations of the sea-level inNorth America and Africa. So above-mentioned 5 cycles could represent the eustasies during the latestOrdovician to the earliest Silurian.

在这2个剖面上,放射虫丰度变化也表现出相似的规律,与笔石和腕足类的形态、分异度和丰度变化所反应的海平面升降大体一致,和北美、非洲同期海平面的5次波动可以对比,据此指出,以上5次海平面旋回代表了晚奥陶世晚期至志留纪初期全球性海平面变化。

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我的第一篇文章为屏幕力量杂志,在对这天是Jackie Chan 正式杂志,是香港actioner Gen X 警察的DVD 回顾,担任主角Nicholas Tse 和丹尼尔吴。

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