| Show Work of Earthquakes s Readjustments of Weight that Alter the Earth Crust and Change I Its Sut Surface ace lIP g 11 earths crust Is composed of ofT heterogeneous elements hut but all 1111 T possess ono Important property though In varying do grace trec Alike In very moderato elea dons l n and in lOCI lofty mountain chains chain the thero ro rocks are seen to have been thrown into and troughs and oven even to have havet t been Leen crumpled and folded like sheets ot of paper 11 Ie I or of or broken up Iw by bythe the enormous stratus and unI c they have bave been brel to lo loof of oe time the prevailing beneath the crust erust wo ire know fur far lees IC R When pIt are sunk time tho temperature increases lit alt t 1 n progressive r rata to a Ith the depth holl Ing springs are arl some mak making leg ing their way I to 10 the surfnee stones and n ash h molten rock are extruded through vents hut but most mORt significant of nn all to III the geologist t tj j Is the of I nicks Ick must have helm been melted lit at r moderate depths but ur are IIO now on the surface of every cr quarter Of the globe glob Thera 11 1 tm thus till certainty that hut th the cooled surface Is III lu ut at seine Homi not depth h by rock reek In a mottell stale both bolh fluid ant and pasty past through heat heill Helo this Ihl Is the heated moll sphere to which astronomers assign the rigidity and density of steel and which Is k kept Jt solid by compression of tau tho external layers time the nu dell elcus kept by compression time the cool enveloping shell ill in which lies the force some condition must l exist le Ics pressure the tho surface nor normol normal mol mal conditions must prevail anti and rocks locks nt at their melting mist ho he In time the liquid state of sing troll front a smelt Our globe would therefore con consist ht of on an outer cooled heterogeneous anti hex lIx Ibl crust with a lag dew award and l passing Into Inlo ro rocks lit at above the melting palm In n 11 state Which ye III turn lurn overlie the heated nucleus kept solid II by compression and of the tho rl rigidity of oC steel If the rust were undisturbed time molten layer It Teats would bl be but bul agencies frost end rain III ere cen ek at work weight tram the hills and It under the fI sea t decreasing the here hla and n adding to 10 It there The Jb rivers debauch Into the th sea ell charged with slit la II It HI outside the Ihl of the tho surf and the Iho acting like a 11 map along time base of time he f comm tin tribute their quote quoin or of eroding anti and lip up Ih the coast Ih the material being out b by time the waves 1118 to hI swell the deposits forming to Ih the within the littoral zone Geology hut Il ll In linee rea reach h thousands s of feet In thickness the ot of b by the breakers impairs the power ot of time the crust along time IIII sea Thus two parallel lines mire forming the ore of In increasing creasing and time other of lIe de decreasing creasing resistance tunc Is the crust so flexible 1 u us to 10 b be ble to such readjustments or of ht hta lI a pat part ago when perhaps lIa was of al already ready rendy among Its the Iho earth suffered III ht n a glacial period I when cart alt fro Ico caps Conned over III lire ele elevated I 1 regions Mary of the tho gr great t rh ens empty Into II bays sheltered h from toast currents current there ther term t deitus which have been proved Ity by borings to 10 bl be thousands of feet thick yet iet each cach foot haN halm been formed In water n few fel feet deep at 1111 proved II by I lime h angle ot of betiding time the fauna land debris amid the sorting action ot of the waves Ie In all these cases the crust must t hlll have sagged udder r the increasing load of 11 1 material and dill I It nor give Iv way n under the additions of oe weight along the zone ono eVery 1 amid l continent would he be for by shoals hoal no 10 deeper than the thu disturbing motion of th the wates When th the crust crull Bags aa out tl to liel ea the column or of water over It deepens augmenting the pr pressure Plure The Tho pressure acting on the lire molten layer tends to 10 It not steward where the water h de deeper cr but butr I I r |
