黄龙灰岩是李四光、朱森1930年创建。1935年,李毓尧、李捷、朱森在研究宁镇山脉地质时,其岩性为灰白微显红色之纯灰岩,质细而性脆,底部常为数米至一、二十米之暗灰色矽质灰岩,中含燧石结核;二层之间,有结晶白色灰岩,惟厚度不一。总厚约百米。黄龙 Huanglong limestone is Li Siguang, Zhu Sen was founded in 1930. In 1935, Li Yuyao, Li Jie and Zhu Sen studied the geology of the Ningzhen Mountains. The lithology of the rocks was pure limestone with a slight reddish-gray appearance. The rocks were fine and brittle with dark gray at the bottom of meters to one and twenty meters Siliceous limestone, with flint nodules; between the two layers, there are crystalline white limestone, but the thickness varies. Total thickness of about 100 meters. Huanglong