摘要
植物化石记录了丰富的古气候和古环境信息,为研究地史时期气候变迁、古环境重建提供了依据。2018年在甘肃白银宝积山盆地中侏罗统窑街组采集到了屈囊蕨属植物叶片化石。通过对当前标本的宏观形态学特征研究,将其归于山西屈囊蕨(Gonatosorus shansiensis)。屈囊蕨属在中国发现的化石记录较少,该属化石在甘肃宝积山盆地为首次发现。现生蚌壳蕨科植物生长在温暖潮湿的环境中,推测甘肃宝积山盆在中侏罗世为温暖潮湿的环境。屈囊蕨属植物在中侏罗世的分布区为华北地区和西北地区中部,到早白垩世逐渐转移到东北地区,反应出逐渐向北推进的演化趋势。
Plant fossils record abundant information of paleoclimate and paleo-environment,which provides a basis for the study of climate change and reconstruction of paleo-environment in the geohistorical period.Plant fossil specimens of Gonatosorus leaves were collected from the Middle Jurassic Yaojie Formation of the Baojishan Basin,Gansu Province in 2018.They were identified as Gonatosorus shansiensis(Size)Wang according to the macro-shape characteristics.There are only a few fossils in China,and the fossils of this genus were first discovered in Baojishan Basin,Gansu Province.It is speculated that the Baojishan Basin in Gansu Province was warm and wet during the Middle Jurassic according to the nearest living relatives species of Dicksoniaceae grow in a warm and humid environment.The distribution area of the Gonatosorus were north China and central Northwest China during the Middle Jurassic,and gradually moved to northeast China during the Early Cretaceous,reflecting the evolution trend of gradually advancing northward.
作者
杨国林
彭措
李军
邓鹏
张晓琴
杨帆
YANG Guo-lin;PENG Cuo;LI Jun;DENG Peng;ZHANG Xiao-qin;YANG Fan(BaiLie School of Petroleum Engineering,Lanzhou City University,Lanzhou 730070,China;Gansu Geological Museum,Lanzhou 730010,China;College of Urban Environment,Lanzhou City University,Lanzhou 730070,China)
出处
《甘肃地质》
2022年第2期1-7,76,共8页
Gansu Geology
基金
国家自然科学基金项目(41901066)
兰州城市学院博士科研启动基金项目(LZCU-BS2018-11)
甘肃省古生物化石调查研究及数据库建设项目
兰州城市学院2022年大学生创新创业训练计划项目(DC2022091)联合资助。
关键词
甘肃白银
宝积山盆地
中侏罗世
屈囊蕨属
古环境
Gansu Baiyin
Baojishan Basin
Middle Jurassic
Gonatosorus
paleoenvironment
