OSTRACOD BIOSTRATIGRAPHY OF THE UPPER CRETACEOUS FIRST MEMBER OF THE NENJIANG FORMATION IN THE SONGLIAO BASIN
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Abstract:
Based on a detailed study of ostracod specimens in 87 samples from the selected Xing-104 well, Xing-1- Ding-3-Jian-323 well and Ta-3 well, a total of seven ostracod fossil zones of the Upper Cretaceous First Member of the Nenjiang Formation in the Songliao Ba- sin were established, including one newly established ostracod fo zone. The detail. The important f tion of rock ssil zone and one revised ostracod fossil seven ostracod fossil zones are described in seven ostracod fossil zones could provide an ramework for the subdivision and correlaunits of oil-bearing beds in the oilfield.
