THE CRETACEOUS OSTRACODA ASSEMBLAGES AND ITS BIOSTRATIGRAPHIC CHARACTER ISTICS IN THE HAILAER BASIN
Zhenwen Liu · Weiti gushengwu xuebao · 2004
This paper briefly introduces the sedimentary character istics and stratigraphic sequence in the Hailaer Basin. Based on the composition and distribution of ostracode species, five ostracoda assemblages have been identified: 1. Limnocypridea subscalara-Hailaeria dignata assemblage; 2. Cypridea badalahuensis-Hailaeria cretacea assemblage; 3. Ilyocyprimorpha hongqiensis-Rhinocypris rivulosus assemblage; 4. Altanicypris obesa-Talicypridea triangulata assemblage; and 5. Chinocypridea augusta-Talicypridea qingyuangangensis assemblage. According to the materials of ostracods and their distribution, we described the biostratigraphic features and pointed out their significance in stratigraphic subdivision and correlation in the Hailaer Basin.