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北京市地质局水文公司设计的大兴县化纤厂内供水井,由国家建委建筑研究院勘察技术研究所水文室于一九八一年六月至十月施工完成。该水井位于大兴县黄村西约700米化纤厂内,在地质构造位置上属于大兴凸起西北斜坡。完钻井深300.80米,全部取心。在井深76.40米以上为第四系沉积。井深76.40—300.80米主要为灰岩(视厚度224.40米),可分十二层。从灰岩段中,我们共选取岩心60块。进行了牙形石分析。由于岩心量少,每块不超过300克,最少仅有70克,因此所获化石数量受到一定影响。即使这样,也在27块岩心中得到一定数量的
The water supply wells in the Daxing Chemical Fiber Plant designed by the Beijing Municipal Bureau of Geological Hydrology have been completed by the Hydrology Laboratory of the Institute of Survey Technology of the State Construction and Construction Commission from June to October 1981. The well is located in Daxing County, Huangcun about 700 meters west of the chemical fiber plant, in the geological structure of Daxing convex northwest slope. Drilling depth of 300.80 meters, all coring. In the depth of 76.40 meters above the Quaternary sediments. The depth of 76.40-300.80 meters mainly limestone (depending on the thickness of 224.40 meters), can be divided into twelve layers. From the limestone section, we selected a total of 60 cores. Conodont analysis was performed. Due to the small amount of core, no more than 300 grams per piece, at least only 70 grams, so the number of fossils received is affected to some extent. Even so, a certain number of rocks were obtained in 27 cores