层序地层学的名词英语解释

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1、层序地层学的名词英语解释0Glossary"ql$Rz8 Accommodation.Anothertermforrelativesea-level.Canbethoughtofasthespaceinwhichsedimentscanfill,definedatitsbasebythetopofthelithosphereandatitstopbytheoceansurface.lMl'+yy 18Vn[}]" BasinwardShiftinFacies.Whenviewedincross-sect

2、ion,ashiftingofallfaciestowardsthecenterofabasin.Notethatthisisalateralshiftinfacies,suchthatinverticalsuccession,abasinwardshiftinfaciesischaracterizedbyashifttoshallowfacies(andnotaverticalshifttomorebasinwardordeeper-waterfacies).
wPX^P t,n2N13 Bed.La

3、yerofsedimentaryrocksorsedimentsboundedaboveandbelowbybeddingsurfaces.Beddingsurfacesareproducedduringperiodsofnondepositionorabruptchangesindepositionalconditions,includingerosion.Beddingsurfacesaresynchronouswhentracedlaterally;therefore,bedsaretime-stratigra

4、phicunits.SeeCampbell,1967(Sedimentology8:7-26)formoreinformation.mMvAA; `8r$b/6 Bedset.Twoormoresuperposedbedscharacterizedbythesamecomposition,texture,andsedimentarystructures.Thus,abedsetformstherecordofdepositioninanenvironmentcharacterizedbyacertain

5、setofdepositionalprocesses.Inthisway,bedsetsarewhatdefinesedimentaryfacies.EquivalenttoMcKeeandWeir'scoset,asappliedtocross-stratification.SeeCampbell,1967(Sedimentology8:7-26)formoreinformation.&6vWz6!P 8A5/jqnqt Condensation.Slownetratesofsedimentaccumulatio

6、n.Stratigraphiccondensationcanoccurnotonlythroughacessationinthesupplyofsedimentatthesiteofaccumulation,butalsoincaseswherethesupplyofsedimenttoasiteisbalancedbytherateofremovalofsedimentfromthatsite.Wherenetsedimentaccumulationratesareslow,avarietyofunusualsed

7、imentologicfeaturesmayform,includingburrowedhorizons,accumulationsofshells,authigenicminerals(suchasphosphate,pyrite,siderite,glauconite,etc.),earlycementationandhardgrounds,andenrichmentinnormallyraresedimentarycomponents,suchasvolcanicashandmicrometeorites.8#

8、

9、Y~P ;l1.jQh Conformity.Beddingsurfaceseparatingyoungerfromolderstrata,alongwhichthereisnoevidenceofsubaerialorsubmarineerosionornondepositionandalongwhichthereisnoev