从世界各地煤矿的成煤时期中,我們知道在中国第一个成煤时期为石炭二叠纪。第二成煤时期为侏罗纪。可是,对新第三纪煤却很少研究也很少发現,今将小峪子溝新第三纪煤的分布及規模,产状及构造形态及新第三纪的成煤条件等論述如下。 From coal-forming coal mines throughout the world, we know that the first coal-forming period in China was Carboniferous Permian. The second coal formation period for the Jurassic. However, few studies on the Neogene coal seldom find that the distribution, size, occurrence and tectonic morphology of the Neogene Tertiary coal in Xiaoyuzizigou and the conditions of coal formation in the Neogene were discussed as follows.