MIDDLE DEVONIAN (GIVETIAN) CORAL-STROMATOPOROID REEF AT YANSHAN, NORTH OF GUILIN,GUANGXI,SOUTH CHINA
MIDDLE DEVONIAN (GIVETIAN) CORAL-STROMATOPOROID REEF AT YANSHAN, NORTH OF GUILIN,GUANGXI,SOUTH CHINA
桂林北郊岩山中泥盆世吉维期珊瑚-层孔虫礁
MIDDLE DEVONIAN (GIVETIAN) CORAL-STROMATOPOROID REEF AT YANSHAN, NORTH OF GUILIN,GUANGXI,SOUTH CHINA
桂林北郊岩山中泥盆世吉维期珊瑚-层孔虫礁