The interpretation of the origin of the Laba Limestone in the Permian Laba Formation in western Yunnan has been controversial for a long time.
滇西二叠系拉巴组中的拉巴灰岩的成因长期以来曾引起广泛争议。
The “Pseudo Laba Formation” of the Talalong Nanya outcrop belt of the west zone in the Changning Menglian belt was formerly classed as Permian, but now because of the discovery of conodonts and radiolarians, the age of this outcrop belt can be closely estimated as Late Devonian (Famennian) to Early Carboniferous.