Fig. 5From: Age assignment of the upper Carboniferous Arbasay Formation in Shichang Region, North Tianshan (NW China)Representative photographs of volcaniclastic rocks in the upper part of Arbasay Formation. a–c Greyish volcanic breccia and agglomerate; hammer (scale) is 28 cm long, person (scale) is 1.7 m tall, alpenstock (scale) is 1 m long. d Pink tuff, the deformation is caused by faults and folds; hammer (scale) is 28 cm long. e–g Greyish brown tuffaceous sandstone with cross beddings; pencil (scale) is 20 cm long. h Volcaniclastic rocks are conformable contact with each other; person (scale) is 1.7 m tallBack to article page