Distribution and depositional model of microbial carbonates in the Ordovician middle assemblage, Ordos Basin, NW China

WEI Liubin,ZHAO Junxing,SU Zhongtang,WEI Xinshan,REN Junfeng,HUANG Zhengliang,WU Chunying

Fig. 3. Medium sedimentary structure of microbial carbonates in the Ordovician middle assemblage in mid-east of Ordos Basin. (a) Laminar stromatolite dolomite, 3695.85 m, Ma57, Well Tong 79; (b) Laminar stromatolite dolomite, 3676.86 m, Ma56, Well Tao 77; (c) Dome-shaped stromatolite dolomite, 3643.02 m, near the Ma55-Ma54 interface, Well Tao 17; (d) Hummocky stromatolite dolomite, 3316.57 m, Ma56, Well Tao 88; (e) Columnar stromatolite dolomite, Ma55, 2548.24 m, Well Mi 75; (f) Columnar stromatolite dolomite, 2454.84 m, Ma55, Well Mi 153; (g) Columnar stromatolite dolomite, 2419.77 m, Ma55, Well MT 1; (h) Columnar stromatolite dolomite, 3315.41 m, Ma55, Well Tao 112; (i) Laminar clotted dolomite, 3693.11 m, Ma57, Well Jin 7; (j) Reticular clotted dolomite, 3685.49 m, Ma57, Well Jin 8; (k) Dendritic clotted dolomite, 3320.45 m, Ma56, Well Tao 88; (l) Dendritic clotted dolomite, 3657.09 m, Ma56, Well JT 1.