The Evolutionary Characteristics of Lower Permian Keziliqiman Reefs in the Southwest Margin of Tarim Basin, Northwest China

Figure 5

Colospongia. (a)–(c) are outcrop photos of Colospongia. (d) and (e) are photomicrographs of Colospongia.

(a)

(b)

(c)

(d)

(e)