长白山区广泛的分布着新生界的玄武岩。这些玄武岩在地貌上多呈现一种剥蚀台地景观。它们的岩性主要特点是橄榄玄武岩。橄榄石斑晶直径多为1公厘左右。岩石结构从致密块状到气孔状,杏仁状都有。产状大体水平,厚度各处不等。于旺清县磨盘山所见厚达100公尺以上,从岩相变化(气孔与致密状成层构造)上看来显然是多次喷发。但在各层间还没有看 Changbai Mountain area is widely distributed in the Cenozoic basalts. These basalts show a more eroded platform landscape in terms of geomorphology. The main feature of their lithology is olive basalts. Peridot phenocryst diameter more than 1 mm. Rock structure from the dense block to stomatal, almond-shaped. The general level of production, thickness ranging from place to place. The thickness of Mopanshan in Wangqing County is more than 100 meters. It seems obviously multiple eruptions from lithofacies changes (stomata and tight stratigraphic structure). But not seen in all levels