鱼粪化石特征对早侏罗世托阿尔期湖泊生态系统的启示:以川东大安寨段为例*
周小梅1, 金鑫1,2, 吴强旺1, 葛禹1, 时志强1,2

Enlightment of fish coprolites characteristics on lake ecosystem in Early Jurassic Toarcian: taking the Da’anzhai Member in northeast Sichuan Basin as an example
Zhou Xiao-Mei1, Jin Xin1,2, Wu Qiang-Wang1, Ge Yu1, Shi Zhi-Qiang1,2
川东北大槽剖面下侏罗统自流井组大安寨段鱼粪化石及其围岩显微特征 A—85号鱼粪化石的围岩样品,粉砂质泥岩,含有介壳类生物化石(红色箭头所示),正交偏光;B—85号鱼粪化石的围岩薄片,见生物介壳(红色箭头所示),泥页岩,单偏光;C,D—85号粪化石的切片,可观察到厘米级化石为磷质成分,应为所食鱼类骨骼化石(红色箭头所示),单偏光;E—86号粪化石围岩的切片,粉砂质页岩,含介形虫化石(红色箭头所示),正交偏光;F,G—86号粪化石的切片,见大量的磷质鱼刺结构(红色箭头所示),部分鱼类骨骼较大(如G中红色箭头所示),单偏光;H—86号粪化石显微照片,含较多的粉砂及黑色炭屑,单偏光;I—89号鱼粪化石的围岩薄片,泥页岩,单偏光