Show 1 i ater water I 1 hole la dry by J payi day sart 1 1 k X A cl curious urious form of avi waterhole water i ee hole js ts i aund I 1 in the deserts desert of wes western terii au ans 01 F ila dry by day bui but y yielding beldin r aau an da 1 cupply of water by night I 1 N Vs T now flow of water vater I 1 Is preceded b by y y wead wead ahls hissing st ng and sounds of rushing air wd ari I 1 6 one ne I 1 lt C was 1 found on iid I 1 ii that the iho wa p ij supply occurred dlan in a long narrow etro j tre nc h a at the 66 bottom ot of ai a i thAp thin plate laie of kl gneiss lelis 6 a I 1 species of rock arranged n layers te drate by P CL cavity froni from the mala main raci rock mass beneath apparently the 12 faVOL at of tile the day aay cauff s this plate to expand in the formoe form of a depression I 1 n katr betrea ti tB i ahei it cools and contracts at right it forces i first airland ia then water atef back letot into the llcy I 1 trena trench I 1 1 1 |