古生代

After detail field inspecting, combined with the deep indoor research result, the author regarded that those deposits, which districted in West Kunlun Mountain Region , are belong to Mississippi Valley Type Lead-Zinc deposits.

本文运用区域成矿学理论从沉积建造、岩浆活动、构造演化以及区域地球物理场和地球化学场特征等方面系统地阐述了西昆仑地区（特别是奥依塔格—库尔良晚古生代裂陷盆地）的成矿地质条件。

The purpose of the present paper is to study the sedimentary character of the coal-bearing strata and the genesis of the kaolin rocks during late Paleozoic era.

本论文主要研究了山西省境内太原以北晚古生代煤系地层沉积特征及高岭岩的成因。

The structural evolution of Tarim basin can be divided into two major periods, the Paleozoic craton basin evolution and the Mesozoic-Cenozoic foreland basin evolution.

塔里木盆地的构造演化总体可以划分为两大阶段，即古生代克拉通盆地演化阶段和中、新生代前陆盆地演化阶段。

Tall Paleozoic trees superficially resembling modern screw pines; structurally intermediate in some ways between cycads and conifers.

一种高大的古生代树木，外表与现代的露兜树相似；结构上介于苏铁和针叶树之间。

The ore-forming ages of the epithermal gold deposits in northern Xinjiang are in the range of 340~244 Ma, corresponding to the large-scale volcanic-subvolcanic activities at (350±10) Ma,(300±10) Ma and (250±10) Ma.

金矿成矿时代在340~244 Ma之间，金矿在时间和空间上与新疆古生代在(350±10) Ma、(300±10) Ma和(250±10) Ma 3个阶段的大规模火山－潜火山活动有密切关系。

The epithermal gold deposits in northern Xinjiang can be divided into high-sulfidation and low-sulfidation types, with the latter being the main type.

文章在总结前人研究成果的基础上，提出新疆北部古生代浅成低温热液型金矿床可以划分为高硫型和低硫型两大类，以后一种为主。

During the Neoproterozoic to the Early Paleozoic, the South China was a marginal basin captured by the Yangtze active continental margin, filled with very thick flysch, sandstone, and shale sediments.

华南新元古代到早古生代是扬子活动大陆边缘构造&捕获&的一个边缘海盆地，其间充填了巨厚的复理石、砂、页岩沉积。

The main fragment source and source areas component of Xiangshan Group sandstones are Precambrian metamorphic-sedmentary rock and granite-gneiss.

目的 探讨鄂尔多斯西南边缘香山群形成的大地构造环境，为鄂尔多斯盆地西南缘早古生代大地构造背景的恢复和确定提供佐证。

Heavy-bodied reptile with a dorsal sail or crest; of the late ''.

有背鳍和头冠、体重的爬行动物；产于晚古生代。

Heavy-bodied reptile with a dorsal sail or crest; of the late Paleozoic .

有背鳍和头冠、体重的爬行动物；产于晚古生代。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。