3 Sedimentary models for the middle-late Llandoverian to early Wenlockian barrier littoral and neritic sediments in northern LongmenMountains1=mudstone and shale;

• 图3龙门山北段兰德维里世中晚期至文罗克世早期的障壁型滨、浅海沉积模式1.；泥页岩;