Show t keeping U P cien ae sc er v e science service service molten interior of earth theory now revived by science washington t volcanoes volcano es roots may go down to a molten earth interior after all despite the disrepute i nto into which that theory once universally ver sally held has fallen faill n during recent years A picture of the roots of volcan volcanoes oes presenting the old theory in more acceptable modern form was offered before the meeting hero here of the american geophysical union by prof reginald A daly of harvard university professor daly likened the crust of the earth to a wrinkled layer of solid paraffin floating on an interior of melted paraffin the actual materials of the earths crust and deeper layers arg are of course stony solid stone floats on the molten stone connecting mas masses es between the volcanoes and the molten interior doctor daly called by a new name meaning bottomless stones an carries to the surface molten rock material with steam rn and other gases under great pressure these gases are th the e real explosives that supply motive power to volcanoes he said when the supply of them is spent the volcano goes ou out igo eaf the the molten inter interior r of the earth Ss is ot of course not to be thought of as a liquid sloshing slashing shing around like water in a jug it if it were at the surface it might be liquid the material is hot enough so that at least some of it would flow freely but burled at great depths as it is the molten interior mass is under such terrific pressure that it is held to a steely rigidity in terms of the surface the interior can be stated only as a paradox molten yet stiff volcanoes in a series volcanoes of the hawaiian islands are in a connected series so that the behavior of any one ot of them may affect the others stated dr T ujaggar A jaggar the government can who has lived on the rim of kilauea crater for more than a quarter of a century there is a kind of compensatory movement of lavas in the volcanoes he has watched doctor jaggar told his audience when it falls under one of them it usually rises in in another stent or repeated swelling and overflowing of such a vast spring of lava builds a dome shaped crater persistent sinking permits the surface layers to break and crash down forming an enormous pit steam jets or fuma furna roles warn of coming eruptions in the case of many volcanoes dr E G of the carnegie institution of washington pointed out not all volcanoes have these danger signals but on some of them the activity preceding eruptions is characteristic doctor has made a special study of this phenomenon at volcano in in java |