Show molten rock destroys early r a aly geological records washington evidence that geological records of the earths oldest happenings have been destroyed by molten rock masses rising to the surface of the earth in later times was reported to the american geophysical union here by dr E N goddard of the united states geological survey starting more than 50 years ago during the eocene age ag when primitive mammals were displacing the great dinosaurs a mass of molten rock rose up from the depths to break the billion year old crust of the earth at a point where today the mining town of jimtown colo Is located doctor goddard d declared in the intruded rock he found fragments of these younger rocks some of them hardly changed by their submersion in the molten mass other fragments were great ly changed and there Is evidence that still others had been melted and dissolved in the he rising mass transformed into part of it these findings doctor goddard pointed out show on a small sea scale i e the cycle of rock changes that Is s going on everywhere molten rocks are washed away deposited as sod sediments imenes then they are heated and squeezed into new forms then are arc absorbed by intruding mel melted ted rocks beginning the cycle all over again |