Three angular unconformities found in the field work in the previous baishan formation of the carboniferous in poziquan area help to subdivide baishan formation into four formations 摘要通過野外工作,在前人所劃的坡子泉地區(qū)石炭系白山組內(nèi)新發(fā)現(xiàn)三個角度不整合,而將白山組解體成四個組。