LATE TRIASSIC SPORE-POLLEN AND ACRITARCHS IN JIEZA GROUP, SOUTHERN QINGHAI PROVINCE

Abundant spore-pollen and Acritarchs are found in Jieza Group (southern Qinghai), altogether 51 genera, 70 species, including a species nov.. The microfossil assemblage is made of fernlike spores (45%); Gymnos-permous pollens (34%) 5 Acritarchs (21%).Major spores consist of Apiculatisporis (7.9%), Punctatisporites (6%); Dictyophllidites (3.7%); Raistrickia (3.6%); Lycopodiacidites (2.7%); Lophotriletes(2%); Concorisporites (1.5%); Marattisporites (1.5%); Vndula tisporites (1.2%), etc.. Pollens are mainly composed of Chordasporites(6.5%), Psophosphaera (3.9%) 5 Ovalipollis (3.6%); Pinites (2%); Caytonipollenites (2.7%); Cycadopites(3.9%),etc.. Dominant Acritarchs are Micrhystridium(9.1%), Brocholaminaria (2.2%), Laminarites (1.2%).etc.. The geological age of those microfossils is late Triassic.