Microspar structures rep resented by comp lex p tygmatically folded, dotted lags, blobs or vertical and horizontal ribbons and veins are common in Proterozoic carbonatesworldwide.

• 国内外元古代碳酸盐岩中常见席状、透镜状、脉状和块状等形态的微亮晶碳酸盐岩。