G GEOG1710 1st Edition LLecture 10 Outline of Last Lectture E Form mation I Earth s II Earth s E Structure III Perspective P es on Earth IV Modern M Theeory Plate Tectonics T Outline of Current Lecture E Earth s Crusst I II T Tectonic Pro ocesses Currentt Lecture Earth s TTopographyy lay of the land F Form of thee Earth s Surrface Creation n and Destruction of th he Earth s Crrust Continents grow by acccumulated m C matter at th heir edges accretion T Tectonically y stable tectonic acttivity is low compared to plate bou undaries Tectonicc Processes Creates and C d forces w which affect tthe deformation upliftt and movem ment of Earrth s crust H How All staarts with strress the fo orce or enerrgy applied o Typees of stress shear com mpression an nd tension o Stress leads to sstrain thin nning foldin ng warping and the ressponse is faulting ULTING OCCURS AT ALLL DIFFERENTT TYPES OF PLATE BOU UNDARIES o FAU o Tenssion divergent compression co onvergent sshear tran nsform These notes represent a d detailed interp pretation of th he professor s lecture Grad deBuddy is besst used as a supplement to your own notes n not as a substitute FFolding ben nding land d gets crum mpled due to t compression convergent movves h horizontally y o Up warpingg mantle co U onvection glaciers meltt and erosio on occurs T Three differrent types o of faults o Norm mal Fault divergent d o Reveerse Fault cconvergent o Strikke Slip Faultt transform m W Where doess orogenesis mountain n building occur o IMM MEDIATE STR RESSES MOUNTAIN TYPE TYPEE OF BOUND DARY Verttical uplift Hot spot vvolcanoes Isolaated Verttical uplift Ocean riftt zones Divergent Verttical uplift Continenttal rift zoness Divergent Com mpression Subductio on volcanoes Convvergent Com mpression Collision mountains m Convvergent Why do earrthquakes occur W 1 Fricttion buildingg between p plates at bo oundaries 2 Wheen stress is high h friction overcomees 3 Platees move intto new posittion 4 Seismic energy released intto surround ding crust R Richter scale amplitud de of ground d motion increases on ne order in magnitude a tenfold i increase in aamplitude M Moment maagnitude scale o Amo ount of enerrgy released d o Baseed on amou unt of fault d displacemen nt o Morre accurate than Richteer scale
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