【摘要】 <正> 西秦岭地区1959年以前,在地层研究方面基本属半空白区;叶连俊、关士聪(1944)和黄振辉(1959)的调查也仅限于东部天水、武都一带。根据他们的报导,西秦岭仅存在有中泥盆世晚期至晚泥盆世沉积,而缺失中泥盆世早期及早泥盆世沉积。1960年前后,兰州地层古生物中心站对迭部下吾那沟、当多沟的铁矿层进行了初步研究,采集了丰富的腕足、珊瑚化石,确定了铁矿层时代属中泥盆世早期。从1967年以来,西北地质科学研究所、甘肃地质更多还原

【Abstract】 In the Debu and Luqu region of Western Qin Ling range, the Devonian stratigraphic sections, consisting mostly of reef and shelly facies ,are rather complete, distinct and rich in fossils. This rock sequence may be divided into 8 formations and 18 assemblage-zones. The Lower Devonian is composed deposits of lagoonal facies and its faunas resemble with those of Middle Europe, East Europe and Middle Asia. The Middle and Upper Devonian belong to deposits of littoral and shallow sea facies and its faunas may be correlated with the Xiangzhou type of South China.更多还原