Department;
of;
Botany,;
University;
of;
Calcutta,;
35;
Ballygunge;
Circular;
Road,;
Kolkata;
700019,;
India;
Narasinha;
Dutt;
College,;
129;
Bellilious;
Road,;
Howrah;
711101,;
India;
Radiocarbon;
Dating;
Laboratory,;
Birbal;
Sahni;
Institute;
of;
Palaeobotany,;
53;
University;
Road,;
Lucknow;
226007,;
India;
植物化石; 考古学; 指示剂; 恒河; 植被; 印度; 孟加拉;