The thin biolimestone was an important petroleum exploration area that was ignored in continentaldeposit basin.
陆相湖盆中的薄层生物灰岩是一个被忽视的油气勘探的重要领域。
2
The Lower Triassic Marine source rock is the most favorable one in the Lower Yangtze area, and the continentaldeposit has certain hydrocarbon generating potential.
下三叠统海相烃源岩是下扬子区最有利的烃源岩，陆相沉积也具有一定的生烃潜力。
3
The Baideng phosphorite deposit is of shallow-sea facies; while the Qinglongshao phosphorite belongs to continental facies.