报道在重庆首次发现的晚侏罗世木化石群。化石产地为綦江区古剑山,地层层位为上侏罗统蓬莱镇组上段。化石经磨片后显微镜观察可确定为松柏类植物木材。该木化石群不仅是四川盆地发现的地层层位最高的木化石群,而且应是我国侏罗系层位最高的木化石群。该木化石群可能形成于湖边,反映晚侏罗世该地区可能盛行干旱—半干旱气候。结合之前马桑岩木化石研究可以推断四川盆地从中侏罗世到晚侏罗世虽然沉积相发生了变化,但气候并未发生根本性变化,一直保持干旱—半干旱气候。 The first Jurassic fossil assemblage discovered in Chongqing was reported. The fossil origin is Qijian Mountain, and the stratigraphic layer is the upper Jurassic Penglaizhen Formation. After the fossil grinding disc microscopy can be identified as pine and cypress wood. The wood fossil group is not only the highest fossil wood group found in the Sichuan Basin, but also the highest fossil wood group in the Jurassic in China. The wood fossils may form at the lake, reflecting the possible prevalence of arid-semi-arid climate in the area during the Late Jurassic. In combination with the previous studies on the Marcos petrified wood fossils, it can be inferred that the sedimentary facies of the Sichuan Basin changed from the Middle Jurassic to the Late Jurassic, but the climate did not change fundamentally and maintained arid-semi-arid climate.