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1、文章题目：《FaciesAssociations,Paleoenvironment,andBase-LevelChangesintheUpper上CretaceousWahweapFormation,Utah,U.S.A.»文章出处：《Geosphere》文章作者：ZubairA.Jinnah1andEricM.Roberts2FaciesAssociations,Paleoenvironment,andBase-LevelChangesintheUpper上CretaceousWahweapFormation,Utah,U.S.A.TheWahweapFormationisan400-m-
2、thicksuccessionoffluvialandestuarinechannelsandstonesandfloodbasinmudstonesdividedintolower,middle,upper,andcappingsandstonemembers.FaciesanalysisoftheWahweapFormationontheKaiparowitsPlateaurevealsthepresenceoftenfaciesassociationsgroupedintochannelandfloodbasindeposits.Faciesassociations(FAs)fromc
3、hannelsinclude:(1)single-storyand(2)multistorylenticularsandstonebodies,(3)majortabularsandstonebodies,(4)gravelbedforms，(5)low-angleheterolithiccross-strata,and(10)lenticularmudrock,whereasfloodbasinfaciesassociationsinclude:(6)minortabularsandstonebodies,(7)lenticularinterlaminatedsandstoneandmud
4、rock，(8)inclinedinterbeddedsandstoneandmudrock,and(9)laterallyextensivemudrock.Thelowerandmiddlemembersarcdominatedbyfloodbasinfaciesassociations.ThelowermemberconsistsdominantlyofEA8,interpretedasproximalfloodbasindepositsincludingleveesandpondmargins,andiscappedbyapersistenthorizonofFA3，interpret
5、edasamalgamatedchanneldeposits.FAs4and6arealsopresentinthelowermember.ThemiddlememberconsistsdominantlyofFA9，interpretedasdistalfloodbasindepositsincludingswamp,oxbow-lake,andwaterlogged-soilhorizons.FAs1，2，5，6，7，8，and10arepresentinthemiddlememberaswell,whichtogetherareinterpretedasevidenceofsuspen
6、ded-loadchannels.Theuppermemberissandstone-dominatedandconsistsofFAs1,2，3，5，7,and8-FAs5and7,whichoccuratthebaseoftheuppermember,areinterpretedastidallyinfluencedchannelsandsuggestamarineincursionduringdepositionoftheuppermember.ThecappingsandstoneischaracterizedbyFAs3,4,and6，andisinterpretedtorepre
7、sentamajorchangeindepositionalenvironment,frommeanderingriversystemsinthelowerthreememberstoalow-accommodation，braidedriversystem.ImprovedageconstraintsontheWahweapFormationindicatethatthemiddleanduppermemb
