Show CAVES UNDER THE LAVA BEDS wonderful natural formations Format loni of them miles long found in california in the vicinity of tule lake call fornia about 40 extinct volcanoes have been found many aheady being covered with thick vegetation and be neath the beds ot of lava gi ghen ell off by them hem in the past numerous interesting caverns have recently been discovered and explored one la Is said to be feet long 60 feet wide and 40 feet high another has been reported discoN discovered ered which is IB miles long it has baa been named the mammoth cave of california one recently explored la Is said eald to con tain two stories the temperature temper aturo in the under one being so BO low that icicles two yards long depended from the cell ing k large eaves caves have various origins abany man have once been solid ground covered with heavy clay and limestone rock the lower ground Is washed away by underground waters a root roof and floor being left other caves are the result of air or other gases getting into the molten lava expanding with the heat beat and blowing themselves into lava bubbles leaving hollows and caverns when the lava has cooled and hardened just as air bubbles may be seen to do in molten tar the pathfinder |