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brachiopod相关的网络例句

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与 brachiopod 相关的网络例句 [注:此内容来源于网络,仅供参考]

Two brachiopod assemblage zones have been established for the first time in the Laka Formation of this area; they are the Choristites xainzaensis-Eomarginifera assemblage zone and Neospirifer kubeiensis-Fusispirifer plicatus-Stepanoviella assemblage zone.

首次在拉嘎组内建立了2个腕足类生物组合带,即Choristites xainzaensis—Eomarginifern组合带和Meospirifer kubeiensis—Fusispirifer plicatus-Stepanoviella组合带,前者的时代为晚石炭世早期,后者为早二叠世,大致与萨克马尔-阿丁斯克(Sakanarian—Artinskian)相当。

In the light of the palenenvironmental significance reflected by the radiolaria, graptolite, brachiopod, sponge spicule and the rock character, it's suggested that the grayish green mudstone at the basal Wufeng Formation of the Goujiaya section would be probably deposited in 60 to 100meters deep water, the Guanyinqiao bed in 50 to 80meters deep, and the radiolaria-bearing silicalite from Wufeng Formation in water with 200 to 400 meters deep. Combining the above-mentioned water depth with the sea-level change cycles, the change range of every one of the 5 cycles could be further conjectured. They were in ascending order: 20~120m, 80~130m, about 150m, 50~250m, and in excess of 200m.

根据放射虫、笔石、腕足类、海绵骨针以及岩性等对古环境的指示意义,认为五峰组底部灰绿色泥岩段产出时水深约60-100m,观音桥层水深约50-80m,在晚奥陶世最大海侵期(对应于T.typicus亚带下部),水深约400m,五峰组含放射虫硅质岩沉积时最小水深约200m,结合以上海平面变化的5次旋回,从而推算出各旋回海平面的变化幅度:在第①旋回,海平面变化范围大致为20~120m;在第②、第③和第④旋回中,海平面变化分别为80~130m、大约150m和50~250m;第⑤旋回的海平面升降幅度大于200m。

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