Fig. 3From: Types and microbial genesis of carbonate microbodies in Zoophycos from the Pennsylvanian to Cisuralian Taiyuan Formation in North ChinaFour types of differently-colored fillings in Zoophycos from the Pennsylvanian to Cisuralian Taiyuan Formation of North China. a Brown filling; b Gray-white filling; c Gray filling; d Black fillingBack to article page