Qhov twg cov xuab zeb xuab zeb uas haum rau sticking?

Sandstone vuas muaj cov nyhuv peb-seem, uas yog tsim nyog rau kev kho kom zoo rau tsev ntawm lub tsev siab thiab chaw ua hauj lwm phab ntsa; lossis keeb kwm phab ntsa tom qab ntawm cov khw loj loj.