“石千峰群”的问题,是涉及华北及其相邻广大地区陆相二—三叠系划分、对比及界线的重大地层课题,自下而上分为石千峰组(孙家沟组)、刘家沟组、和尚沟组。并确认石千峰组含有晚二叠世的Lueckisporites-Protohaploxypinus 孢粉组合;Abiella sp., Microdontella sp.等瓣鳃类;Sinolimnadiopsis yaoxianensis, Huanghestheria longellipsa等叶肢介;Shihtienfenia permica, Shansisaurus xuecunensis, Tapinocephalidae等脊椎动物化石。刘家沟组含早三叠 The issue of “Shiqianfeng Group” is a major stratigraphic subject involving the division, contrast and boundary of the terrestrial two-Triassic in North China and its adjacent vast areas. It is divided into Shiqianfeng Formation (Sunjiagou Formation), Liujia Gou group, monk ditch group. And confirmed that the Late Permian Lueckisporites-Protohaploxypinus sporopollen assemblage in the Shiqianfeng Formation was confirmed. Abiella sp., Microdontella sp. And other petals were isolated from the vertebrate fossils such as Sinolimnadiopsis yaoxianensis, Huanghestheria longellipsa, Shihtienfenia permica, Shansisaurus xuecunensis and Tapinocephalidae, . Liujiagou Formation contains early Triassic