“carbonaceous rock”簡單造句，carbonaceous rock造句子

3、The Se-rich carbonaceous rocks in the north of Yutangba is prevalently being recognized as the main source of selenium of Yutangba.

4、The city of Guiyang is located in a wide karst valley basin in the central part of Guizhou Plateau, where carbonaceous rocks are developing and karst groundwater sources are abundant.

2、In Yutangba, native se extensively exists within Se-rich carbonaceous rocks, abandoned stone coal spoils and high-Se soils close to Se-rich carbonaceous strata.

1、The occurrence of gold rich carbonaceous rock series and the extensive development of altered rock bodies in the region made the mobilization and concentration of gold possible.