辽西大平房—梅勒营子盆地九佛堂组珍稀化石层的划分与对比

Division and correlation of unique fossil-bearing beds of Jiufotang Formation in Dapingfang-Meileyingzi Basin of western Liaoning

辽西是世界上研究鸟类起源、恐龙进化、鸟类、哺乳动物以及被子植物的早期演化等最重要地区之一。本文重点论述了辽西大平房—梅勒营子盆地九佛堂组含珍稀化石的地层划分与对比。珍稀化石层自下而上包括有:九佛堂组第二段的喇嘛沟层、第三段下部的黄花沟层及第三段上部的原家洼层。根据所含介形类化石组合特征,将联合乡小鱼沟和胜利乡南炉一带含鸟类、翼龙类的化石层与喇嘛沟层对比,胡家营子、八棱观和车杖子一带的含鸟类、翼龙类的化石层与原家洼层对比。

Western Liaoning of China has become one of the most important areas in the world for study of the origin of birds, evolution of dinosaurs, and the early evolutions of birds, mammals and angiosperms. This paper mainly describes division and correlation of unique fossil-bearing horizons of the Jiufotang Formation in Dapingfang- Meileyingzi Basin. Ascendingly, the unique fossil-bearing horizons include those of the 2^rd member （Lamagou Bed） ; the lower part of the 3^rd member （Huanghuagou Bed）, and the upper part of the 3^rd member （Yuanjiawa Bed） in the Jiufotang Formation. Based on fossil Ostracods assemblage characteristic, the bird and Pterosaurs-bearing horizons of the Xiaoyugou of Lianhe and Nanlu of Shengli can be correlated with the Lamagou Bed, as well as the beds of Hujiayingzi, Balengguan and Chezhangzi can be correlated with the Yuanjiawa Bed.