擦痕

• The main crack of tiaohu formation are straight oblique - cracks and level crack , there are many scores in the crack . the length of cracks is long , and they cut across several layers . the average surface density of the cracks is 0 . 101 slips / m . the cracks in lucaogou formation is mostly net cracks , and there are solution on crack surface
  条湖组的裂缝多为平直的斜交缝和水平缝，缝面多见擦痕，延伸长度大，切穿多套地层，裂缝面密度平均为0 . 101条米；芦草沟组裂缝多为网状裂缝，缝面有溶蚀现象，多存在于碳酸盐岩内，裂缝面密度平均为0 . 143条米。