Ma of biotite shows that the rock is formed in the middle stage of Late Paleozoic era.
卡拉麦里缝合带是北疆的一条重要界线，沿该带广泛发育晚古生代火山岩。
The extensive deposition of potash salts in North America in Paleozoic Era was associated closely with the position of paleoequator.
北美晚古生代钾盐大规模集中成矿作用，也与该时期北美大陆古赤道位置密切相关。
Carboniferous: of, belonging to, or denoting a geologic division of the Paleozoic Era following the Devonian and preceding the Permian.
石炭纪的，石炭系的：(属于或表示)地质上的一个分段，即紧跟着泥盆纪而早于二叠纪的古生代的。
The content and the distributing law of the microelements in lower Paleozoic era stone coal in South Qinling have been systematically studied.
对南秦岭早古生代石煤的微量元素含量、分布规律等进行了详细系统的研究。
The exhalation-spout type deposits of the early Paleozoic era and the orogenic type deposits of the late Paleozoic to early Mesozoic era are the most important deposit groups.
早古生代时期的喷气喷流型矿床组合和晚古生代—早中生代时期的造山型矿床组合最为重要。
Of, belonging to, or being the geologic time, system of rocks, and sedimentary deposits of the sixth period of the Paleozoic Era, characterized by the development of coal-bearing rock formations.
盆地周围为前震旦纪变质岩系及古生代灰岩、页岩组成的高丘、低山。
This was the end of the Permian period, and of the era of life called the Paleozoic.
这就是二叠纪以及整个古生代的终结。
This was the end of the Permian period, and of the era of life called the Paleozoic.
这就是二叠纪以及整个古生代的终结。
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