Fig. 1From: Early-Middle Permian palynoflora of Shandong Province, eastern North Chinaa Location of the Shandong Province in North China (the map of China is based on the standard map available on the official website of Ministry of Natural Resources of China: http://bzdt.ch.mnr.gov.cn/); b The Upper Carboniferous to Lower Permian strata distribution in Shandong Province and locations of the studied boreholes (XB15 and DB2)Back to article page