上石炭统顶界
The top boundary of Late Carboniferous
上石炭统黄龙组
upper carboniferous huanglong formation
上石炭统小独山阶—下二叠统紫松阶
upper carboniferous-lower permian
上泥盆统—下石炭统
upper devonian-lower carboniferous
上石炭纪
upper carboniferous period
下石炭统灰岩
The Lower Carboniferous limestone
Ⅵ级以上石英砂岩
quartz sandstones over Ⅵ classes
海上石油工程
offshore oil engineering project