NEW RECOGNITION OF SOME STRATIGRAPHIC AGES OF THE BUQINGSHAN GROUP, QINGHAI PROVINCE

The author for the first time collected abundant sporopollen fossils from sandstone and slate of the Buqingshan Group in many, localities of the A’nyemaqen Mountains in the eastern-central part of Qinghai Province. A total of 32 genera and 61 species have been identified, in which spores of pteridophytes exceed pollen of gymnosperms and a certain quantity of elements of acritarchs are contained. The main genera and species in the above-mentioned spores and pollen are all Early Triassic representative elements both at home and abroad. The Buqingshan was originally assigned to the Lower Triassic. According to the new sporo-pollen data, the greater majority of the group should he considered to be the product of Farly Triassic deposition,