Lecture 7 - Sedimentary Rocks 沉积岩

EnvirSc1G03:Earth&theEnvironmentSedimentaryRocksandtheLocalAreaFieldTripOutline‡Introduction±therockcycle‡Sediments‡Sedimentaryrocks‡Depositionalenvironments‡Stratigraphy±Namingofrockunits‡FieldTripIntroduction:therockcycleIgneous,sedimentary&metamorphicrocksChangefromonetypetoanotherwithtimeWhataresediments?Sediments:1.2.!#$%&'(%$&)%#$&*%+,&-$%.&Whataresedimentaryrocks?ClasticsedimentaryrocksNonclasticsedimentaryrocksconglomeratehalite(salt)Sedimentsbecome:‡-‡-Howdosedimentschangeintosedimentaryrocks?&!/%012/2&ͻ!#$%&'($%))))ͻ)))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))34#42$41&&&)))ͻ)))5602&ClasticSedimentaryRocksClasticsediment‡‡ClasticSedimentaryRocks‡‡ClasticSedimentaryRocksClassifiedaccordingtothe0.0039mmMudstoneMicrite0.0039-0.0625SiltstoneCalcisiltite0.0625-2mmSandstoneCalcarenite2mmConglomerateCalciruditeClasticBioclasticShale‡‡‡ChemicalSedimentaryRocks'(%$&)%#$&*%+,&-$%.&7%#/$&&͚ƌŽĐŬ&ƐĂůƚ͛&DepositionalEnvironmentsThegrainsizeofsedimentaryrocks±±Braidedriver±sands&gravelsGlaciallake±silts&claysDepositionalEnvironmentsTypically,grainsizesare:‡‡Whatisstratigraphy?‡)3/81$%(9&&&*$+#$(&,-.)-'/0%),-$)))ͻ1,.$-%)/,11$+)!)ͻ&2$)3$-&/,1)%$45$(/$)'6)1,.$-(7)%)/,11$+),)))stratastratumNamingofRockUnits‡Distinctiverockunitsthatcanbemappedovera‡usuallynamedaftera‡sub-divided‡formationsareLockportFormationGasportMemberLockportFormationGoatIslandMemberEramosaMemberGuelphFormationClintonGroup)LocalAreaFieldTrip:Geo-EnvironmentsPastandPresent‡Friday±leavesat1pm‡Saturday±leavesat9am±InfrontofHamiltonHall‡5($',1*³6WHHO&LW\´RQ$YHQXH‡Wearsuitableclothing/footwear(noflipflops!)FieldTrip!FREEpizzaandpopafterwards!HowdoIprepare?-readtheassignment-UHDGµ6WHHO&LW\¶availableonAvenue!))WhatdoIwear?comfortableclothinghikingshoes,sneakers127VDQGDOVKHHOV«WhatdoIbring?clipboardlabassignmentpencilblank&graphpaperwater&snackraingear?camera?&&:';&=/#3$(/&Wherearewegoing?&&&&RockChapelTiffanyFallsDundasArenaWhatwillwebedoing?‡Answeringseriesofquestions‡Drawingsketchmaps‡titlewithdate‡scale‡northarrow‡border‡LegendThingsyouhavetodo!‡8$,+)*&$$1)9&.):-'-)&')&2$)6$1+)&-:)‡92$/0)'();3$(5$)6'-)5:+,&$%)&')/'5-%$)%/2$+51$)