Faculty of Geographical Science;
Beijing Normal University;
Beijing 100875;
China;
Hubei Key Laboratory of Petroleum Geochemistry and Environment;
Yangtze University;
Wuhan 430100;
China;
Oil and Gas Exploration Management Center;
Shengli Oilfield;
Sinopec;
Dongying 257000;
China;
Shahejie Formation; Chezhen Depression; pollen; coexistence analysis; palaeoclimate reconstruction;