AEQUINOCTIA, AN OLD PALEOZOIC CONTINENT 573 



s'ils aupresentent le substratum de la plate-forme calcaire comme 

 aupres d'l-tchang' ou s'ils font partie du massif ancien qui existe 

 probablement dans la Sud-Est de la Chine, en formant un avant- 

 pays independant des Altaifdes." 



The most recent data about a fairly considerable area of the 

 eastern part of the Chinese province of Yun Nan are supplied by 

 Deprat.^ This explorer gives many details. He writes (p. 44) : 



Les terrains metamorphiques ou granitiques n'apparaissent que dans le S., 

 dans la vallee du Fleuve Rouge. ... 



Le Cambrien offre un developpement enorme au Yun-Nan, aussi bien 

 dans son extension verticale qu'horizontale; les series fossiliferes sont abon- 

 dantes.^ 



J'ai decouvert I'Ordovicien au N. d'Yi-leang. Le Gothlandien parait 

 represente dans la meme region. 



Le Devonien complet offre un developpement colossal au Yun-Nan. J'ai 

 reconnu le Devonien inferieur. Dans le Mesodovenien, I'Eifelien et le 

 Givetien sont bien caracterises, de meme que le Frasnien et le Famennien 

 dans le Devonien superieur. 



Nous avons pu affirmer la presence du Dinantien. represente par plusieurs 

 niveaux. Le Moscovien offre un developpement enorme, ainsi que I'Ouralien. 



About the relation between all these formations, Deprat goes 

 into details, too, and he informs us that the structure of this 

 territory is very complicated. According to him (pp. 251-60), a 

 local orogenic movement (in the southeastern part of Yun Nan) 

 took place after the Cambrian; there was uninterrupted sedi- 

 mentation during the Silurian, and the corresponding beds ought 

 to exist from Kwei-chow in the east to Burma in the west. The 

 sedimentation continued until the Muscovian in well-developed 

 series. Then there followed a strong ante-Uralian folding; the 

 Uralian formation lies unconformably on the denuded folds of 

 the Old Paleozoic. At the end of the Permian, when marine 

 sedimentation came to an end and before any deposit of Lower 

 Triassic sediments had taken place, a very intense orogenic move- 

 ment occurred. After that, Deprat writes (p. 252): "La derniere 



^ Situated on the Yang-tzi-kiang, at the point separating the middle from the 

 lower part of this river. 



^ J. Deprat et H. Mansuy, Etude geologique du Yun-Nan oriental, Vol. I, Fasc. I, i''^ 

 partie, Hanoi-Haiphong, 191 2. 



3 The italics are mine. 



