Show melted rock layers on closer examination this sod buster from the plains notices that most of the rocks are made up of hardened layers of sediment while others seem to have been melted at one time he now has learned to distinguish between sedimentary and igneous rocks both hard bard both interesting the sedimentary rocks are solidified debris washed down by extinct rivers from bigger slopes which accumulated on the b bottom 0 I 1 t 0 m of oceans lakes swamps and estuaries this sediment was continued next pace I 4 war among dinosaurs occurred here years ago solidified into rode by pressure and nd later elevated by natural forces to where it Is 1 now from to 13 feet above tea sea level could all this accumulation be found in one place it would be a geological layer cake some fourteen miles thick where the high mesas and mountain mountains now stand the colorado via pl akau was once covered by a vast restless reft legs ocean then the prospector prospect 0 r notices that the bothering his geiger counter has bas wavelike wave like ike lines that run in every dir direction ec tion to him tt ft appears like the cross cross section of ia a frozen red desert ot of windblown wind blo blown wn sand and that at is exactly what h I 1 it to in all abou arou around nil the mountains ns w ta these hese strata tilt up upward ward as if the inter late lor of the earth ha had d pushed ai itself up through a layer cake and to 0 o it did great quantities of molten material once festered to the surface and caused gigantic pimples which I 1 later a ter eroded away leaving the hard bard c cores ores to form the mountains |