Umhlaba omdongwe onamatye: ubomvu-bumdaka, mdaka-tyheli, iplastiki ukuya kwiplastikhi eqinileyo, equlathe malunga ne-30% ye-quartz gravel, eyenziwe sisimo sezulu segranite engaphantsi. Ngokubanzi isasazwe kule ndawo, ubukhulu bayo bungu-1.91 ~ 14.50m, ubukhulu obuphakathi yi-8.43m, kwaye ukuphakama okungaphantsi yi -33.18 ~ 10.48m
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