本文报道了首次发现于黑龙江晚白晋世的槐叶萍科Ａｒｉａｄｎａｅｓｐｏｒｉｔｅｓ大小孢子，利用扫描电揭示了其形态特征和孢壁分层，探讨了这类了在地层对比，古生态环境......

Studies of two wells within the coastal swamp onshore Niger Delta were carried out in order to determine the chronology,......