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下侏罗统造上组,门口山组在江西,湖南、粤北、粤东、桂东北区广泛分布(表1)。造上组是我所湘赣中生代含煤地层课题组1976年创建的,为一套夹薄煤层的碎屑岩沉积。门口山组为湘赣会战指挥部1968年创立的。近十年来,湖南、江西、广东等省煤田地质勘探公司及其所属队,湖南、江西、广东等省地质局区测队,广西自治区煤炭局150队以及武汉地质学院,湖北省地质研究所,国家计委地质局地质科学研究院矿产研究所三室,中国科学院南京古生物研究所等单位,相继对造上组和门口山组作了不少工作。但是,对造上组、门口山组所含的双壳纲(瓣鳃类)化石,兄弟单位间人为的产生了同物异
The Lower Jurassic formed the upper group, while the front group was widely distributed in Jiangxi, Hunan, northern Guangdong, eastern Guangdong and northeast Guangxi (Table 1). To create the group is my Hunan-Jiangxi Mesozoic coalbed formation task group created in 1976, as a sandwich thin clastic sedimentary deposits. Door Mountain Group for Hunan and Jiangxi Battle Command was founded in 1968. In the past ten years, Hunan Province, Jiangxi Province and Guangdong Province coal geological prospecting companies and their affiliated teams, the provincial Geological Bureau of Hunan, Jiangxi, Guangdong and other teams, the Guangxi Autonomous Region Coal Bureau 150 teams and the Wuhan Institute of Geology, Hubei Institute of Geology, Institute of Geology, State Planning Commission, Institute of Geology three Institute of Mineral Research Institute of Chinese Academy of Sciences, Nanjing Institute of Paleontology and other units, one after another to make the group and the door mountain group made a lot of work. However, the fossil and bovine units of the bivalve (petal gill) family contained in the front group and the mountainous group have the same artifact