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衡阳盆地下白垩统地层,当前划分为东井组和神皇山组。东井组出露范围小,一般限于盆地南湍,呈零星分布,以不整合覆于前白垩系地层之上。通常认为东井组即为盆地白垩系最早的沉积。事实上,在东井组之下,还存在一套暗紫红色碎屑岩层,分布于衡南县松柏公社马玉堂附近,前国家地质总局石油地质综合大队和湖南石油地质队(1977)曾在该处测制剖面,误认为属东井组。我们在同一地点采集了古生物化石,其生物群的面貌特征和东井组
The Lower Cretaceous strata in the Hengyang basin are currently divided into Dongjing Formation and Shenhuangshan Formation. The Dongjing Formation exposed a small area, generally limited to the basin south turbulence, sporadic distribution, to unconformity over the former Cretaceous strata above. The Dongjing Formation is generally believed to be the earliest sediment of the Cretaceous in the basin. In fact, beneath the Dongjing Formation, there is also a dark purple clastic formation located near Ma Yutang, the commune of Songbai County, Hengnan County. The former General Geophysical Bureau of the State Geological Administration and the Hunan Petroleum Geology Team (1977) The section measuring the section, mistakenly believed to be Dongjing Formation. We collected paleontological fossils from the same site, the features of their biota, and the Dongjing Formation