层序地层学的名词英语解释.doc

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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-section,ashiftingofallfacies

2、towardsthecenterofabasin.Notethatthisisalateralshiftinfacies,suchthatinverticalsuccession,abasinwardshiftinfaciesischaracterizedbyashifttoshallowfacies(andnotaverticalshifttomorebasinwardordeeper-waterfacies).
wPX^P t,n2N13 Bed.Layerofsedimentaryrocksorsedimentsboundedaboveandb

3、elowbybeddingsurfaces.Beddingsurfacesareproducedduringperiodsofnondepositionorabruptchangesindepositionalconditions,includingerosion.Beddingsurfacesaresynchronouswhentracedlaterally;therefore,bedsaretime-stratigraphicunits.SeeCampbell,1967(Sedimentology8:7-26)formoreinformation.mMvA

4、A; `8r$b/6 Bedset.Twoormoresuperposedbedscharacterizedbythesamecomposition,texture,andsedimentarystructures.Thus,abedsetformstherecordofdepositioninanenvironmentcharacterizedbyacertainsetofdepositionalprocesses.Inthisway,bedsetsarewhatdefinesedimentaryfacies.EquivalenttoMcKeeandW

5、eir'scoset,asappliedtocross-stratification.SeeCampbell,1967(Sedimentology8:7-26)formoreinformation.&6vWz6!P 8A5/jqnqt Condensation.Slownetratesofsedimentaccumulation.Stratigraphiccondensationcanoccurnotonlythroughacessationinthesupplyofsedimentatthesiteofaccumulation,butalsoincaseswh

6、erethesupplyofsedimenttoasiteisbalancedbytherateofremovalofsedimentfromthatsite.Wherenetsedimentaccumulationratesareslow,avarietyofunusualsedimentologicfeaturesmayform,includingburrowedhorizons,accumulationsofshells,authigenicminerals(suchasphosphate,pyrite,siderite,glauconite,etc.),e

7、arlycementationandhardgrounds,andenrichmentinnormallyraresedimentarycomponents,suchasvolcanicashandmicrometeorites.8#

8、Y~P ;l1.jQh Conformity.Beddingsurfaceseparatingyoungerfromolderstrata,alongwhichthereisnoevidenceofsubaerialorsubmarineerosionornondepositionandalongwhichtherei

9、snoev