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陕西省洛南县北部石坡地区,出露着一套较完整的前震旦系剖面。我们在《石坡》幅一比五万区调工作中,在该区蓟县系巡检司组的顶部层位米黄色白云岩中发现了为其上部层位——杜关组紫灰色微晶白云岩充填的古老的岩溶堆积。古岩溶堆积主要分布在田门公社鱼洞沟、桑坪公社坡相沟及李河公社一带,呈透镜状、不规则状、漏斗状、哑铃状,相互间有管道状堆积
Shilo area in northern Luonan County, Shaanxi Province, exposing a more complete set of pre-Sinian profiles. In the work of “ShiPo” with an area of 150,000 districts, we found in the beige-yellow dolomite in the top layer of the Jixian Department of Inspection and Quarantine in this area that the upper layer of the Du Guan group of purple gray crystallites Ancient karst deposits in the Dolomites. Ancient karst deposits are mainly distributed in Yandonggou of Tianmen commune, slope phase ditch and Lihe commune of Sangping commune, showing lenticular shape, irregular shape, funnel shape and dumbbell shape,