TY  - Data
T1  - Paleozoic biostratigraphy of the Sayan and Arai Mountains
A1  - Documentation Information Center
DO  - 10.12389/ariddc.01996
PY  - 2026
DA  - 2026-09-03
PB  - Arid Land Ecology and Resources Science Data Center
AB  - The second volume contains the paleontological and biostratigraphic materials of the Silurian and Devonian in the Sayan Alai fold area. The corresponding two parts of this volume are extremely uneven, which is not only because the Silurian sediments in Sayan Alai region are less developed than Devonian sediments, but also because of the low degree of research on the former.In compiling this volume, we have encountered common difficulties in dividing materials involving transitional deposits between the various systems: there are always mixed fauna and flora in these deposits, and there are always opposite suggestions for classifying these deposits into older or younger systems.This problem has not been solved by modern stratigraphy (we believe that it is mainly due to the forgetting of A. PI Karpinski's proposal to divide the transitional sediments between the systems into independent units). In each specific case, this problem is solved arbitrarily and artificially. Therefore, the contemporaneous sediments in different regions are often classified into different systems.The situation is complicated by the fact that such transitional stratigraphic units are moved up and down indefinitely. The viewpoint of the researchers on the stratigraphic location of the reddian stage can well illustrate this point.In 1888, gosley, in his famous monograph l'ardenne, demonstrated that the redinian belongs to the Lower Devonian. In 1912, Mo leilish described a series of typical Silurian formations from the mengkelepi slate, the main fauna of the zedinian stage. However, in 1920, Xia baluwa, Bao Provo and RI dibuwa severely and persuasively criticized Mo leilish's identification and returned to gosley's point of view. However, in 1934, a fox insisted that the Redding deposits in the Sauerland area belonged to the upper Silurian.Subsequently, the debate on the age of the gedingian period was only further deepened: vaschmitt and rohricht classified it as Devonian, while g. Dammer and 
DB  - EGIDC
UR  - https://data.dcxjegi.cn/portal/metadata/6effd11e-6253-4e10-bd4f-c6a44eb275ee
ER  -