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一、前言 南京附近吕家山一带出露的一套中生代地层,李毓尧等(1935)曾将其中的砂岩层划为侏罗系象山层,而将其南侧之紫红色砂页岩、灰岩误划为下石炭统高骊山系及中石炭统船山灰岩。1964年,南京大学地质系在测制1:5万南京,汤山、上党幅区测报告中,将上述石炭纪地层改划为下一中三叠统青龙群及上三叠统黄马青组。1977年,安徽省区测队在1:20万南京幅区调报告中,又将上述地层改划为中三叠统徐家山组。 1985年,杨松生,蔺雨时发表“南京附近的高骊山组”一文,复将上述紫红色砂页岩划为下石炭统高骊山组,并在上部的灰色砂泥岩中采得一些植物化石,定其为古生代之属种:Suble pidodendron sp., Archaeocalamites sp., Calamites sp., Sphenophyllum sp., Loncho pteris sp., Rhodeas sp., Pecopteris cf. plumosa,Mario-
I. INTRODUCTION A set of Mesozoic strata exposed in the vicinity of Lvjiashan near Nanjing, such as Li Yuyao (1935) once designated the sandstone layer as the Jurassic Xiangshan layer, whereas the fuchsia sandstone, limestone Misjudged as the Lower Carboniferous Lishan and Carboniferous Chuanshan limestone. In 1964, Department of Geology, Nanjing University in the preparation of 1: 50000 Nanjing, Tangshan, Shangdang area test report, the above Carboniferous strata reworked into the next Triassic Qinglong Group and the Upper Triassic yellow horse green group. In 1977, the survey team in Anhui Province in 1: 200000 Nanjing amplitude adjustment report, again the above-mentioned strata converted to the Triassic Xujiashan formation. In 1985, Yangsong Ssang and Lin Yushi published a paper entitled “Gao Lishan Formation near Nanjing”. The above purple sand shale was designated as the Lower Lishan Formation of the Lower Carboniferous, and some plant fossils were obtained from the upper gray sand and mudstone. It is a Paleozoic genera: Suble pidodendron sp., Archaeocalamites sp., Calamites sp., Sphenophyllum sp., Loncho pteris sp., Rhodeas sp., Pecopteris cf. plumosa, Mario-