The Global boundary Stratotype Section and Point （GSSP） of the Tortonian Stage （Upper Miocene） at Monte Dei Corvi  

作　　者：byFrederikHilgen HayfaaAbdulAziz DavidBice SilviaIaccarino WoutKrijgsman AlessandroMontanari IsabellaRaffi ElenaTurco Willem-JanZachariasse 

机构地区：[1]Stratigraphy／Paleontology,Dept.ofEarthSciences,UtrechtUniversity,TheNetherlands／／DepartmentofIsotopeGeochemistry,VrijeUniversiteitAmsterdam,TheNetherlands [2]Stratigraphy／Paleontology,Dept.ofEarthSciences,UtrechtUniversity,TheNetherlands／／PaleomagneticLab.“FortHoofddijk”,Dept.ofEarthSciences,UtrechtUniversity,TheNetherlands [3]DepartmentofGeology,CarletonCollege,NorthfieldMN55057,USA [4]DipartimentodiScienzedellaTerra,UniversitadegliStudidiParma,Parma,Italy [5]PaleomagneticLab.“FortHoofddijk”,Dept.ofEarthSciences,UtrechtUniversity,TheNetherlands [6]OsservatorioGeologicodiColdigioco,62020FrontalediApiro,Italia [7]Dip.diScienzedellaTerra,Univ.“G.D＇Annunzio”,66013ChietiScalo,Italy

出　　处：《Episodes》2005年第1期6-17,共12页地质幕（英文版）

摘　　要：The GSSP of the Tortonian Stage, which per definition marks the base of the Tortonian and, hence, the boundary between the Serravallian and Tortonian Stages of the Middle and Upper Miocene Subseries, has recently been defined and ratified by the IUGS. The boundary stratotype-section is Monte dei Corvi (Italy) where the Tortonian GSSP is now formally at the mid-point of the sapropel of small-scale sedimentary cycle no. 76, close to the last common occurrences (LCOs) of the calcareous nannofossil Discoaster kugleri and the planktonic foraminifer Globigerinoides subquadratus and associated with the short normal subchron C5r.2n. The GSSP level coincides closely with oxygen isotope event Mi-5 and the associated glacio-eustatic sea-level low-stand of supercycle T3.1 and concurrent deep-sea hiatus NH4,and is dated astronomically at 11.608 Ma. The Monte Gibliscemi section is accepted as an auxiliary boundary stratotype because the better preservation of the calcareous microfossils in this section enables quantitative analyses and the construction of a stable isotope record.

关 键 词：全球边界层 GSSP 地质结构 运动方向 意大利 海面升降 

分 类 号：P736.1[天文地球—海洋地质]