寒武系第二統(tǒng)和第三統(tǒng)間界線候選層型剖面——烏溜-曾家崖剖面的繼續(xù)研究.pdf

1、貴州大學碩士學位論文寒武系第二統(tǒng)和第三統(tǒng)間界線候選層型剖面——烏溜曾家崖剖面的繼續(xù)研究姓名：王宇軒申請學位級別：碩士專業(yè)：古生物學與地層學指導教師：趙元龍20080601貴州大學碩士學位論文AbstractTheselectionofaGlobalStratigraphicSectionandPoint(GSSP)fortheboundaryofthesecondseriesandthethirdseriesoftheCambriani

2、salongpendingproblemInChinaZhaoYuanlongandYuanJinlianghaveproposedtheWuliuZengiiayaSectionofthe勛iliFormationasaleadingcandidateforthisGSSETheirproposalisbasedonthewellrecognizedFADofOryctocephalusindicuswhichhasbeendemon

3、stratedtodefinethebaseofthethirdseriesoftheCambrianPaleontologicalandbiostratigraphicstudyoftheWuliuZengjiayaSectionhasyieldedarichharvestwhichhadattractedwideattentionbymanyscientistsZhaoYuanlongandYuanJinlianghavepropo

4、sedthattheFADofOryctocephalusindicusisthebestcriterionfordefiningthebaseofthe衄rdseriesoftheCambrianTheWuliuZengiiayaSectionmayprovidethebeststraotypesectionforthiscriticaltimeintervalBeforethesectionmaybeconsideredasaGSS

5、PstudyofsupplementarysectionsoftheKailiFormationandthedistributionoftrilobiteswithinthem，mostimportantlyRedlichia，Bathynotus，Ovatoryctocaragranulata，OryctocephalusindicusisrequiredInthisarticleanewsection，theJianshansect

6、ionisdescribed，measured，andthedistributionsofkeyfossilsfromtheJianshansectionaredescribedThesedatafromtheJianshansectionarecomprehensivelyanalyzedThisstudyaugmentsthestrongcasefortheWuliuZengiiayasectionasaGSSECombinedwi

7、thotherstudiesofthegeochemistry，sequencestratigraphy，acritarchbiostratigraphy，etcthisstudyofthedistributionoftrilobitesconfmnsthesameoverallbiostratigraphic，sedimentologicandgeochemicalpatternsobservedintheWuliu—Zengjiay

8、asectionthusstrengtheningthecaseforGSSPdesignationOryctocephalusindicusiswidelydistributedgloballyandreadilyidentifiablefromcleardiagnosticcharacteristicsBecauseitsstratigraphicrangeisalsobriefitmayreliablybeused弱anindex