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SEA LEVEL EVENTS  LONG-TERM AND
                  AGE         STANDARD   MARINE  TETHYAN    CONODONT   (Sequence Boundaries)  SHORT-TERM  AGE
                  (Ma)  PERIOD           POLARITY  AMMONOIDS  ZONES    [Movement of Shoreline]  SEA-LEVEL-CURVES  (Ma)
                            STAGE / SUBSTAGE  CHRON         (GENERAL)                150  100  50
                                (AGE)                                LANDWARD  BASINWARD     0 m -50  -100 JHe2
                                                                                   200.2
                     [JURA.]                    Psiloceras planorbis
                                                                                   201
                                201.4      LT27n-  Psiloceras spelae               201.4          JHe1
                                                                                                  TRh3
                                            LT28n  C. marshi  M. ultima            202       APPROXIMATE PRESENT-DAY  SEA LEVEL  TRh2
                                                 V. stuerzenbaumi  M. rhaetica
                                            STK"I-                                 203.5          TRh1
                                            M"
                  205                                      M. posthernsteini s.str.                  205
                             RHAETIAN                     (Italian GSSP candidate)
                                            STK
                                            lower  S. reticulatus
                                            R-             M. posthernsteini s.l.
                                            zone          (Austria GSSP candidate)
                  210                       LT23n                                  209.7          TNo4  210
                                                 M. spinescens  M. hernsteini-
                                            LT22n            P. andrusovi
                                 SEVATIAN
                                            LT21r  S. quinquepunctatus
                                            LT21n                                      Long-term
                                                             E. bidentata
                                            LT20r                                       curve
                                            LT20n  H. macer
                  215                       LT19r                                                    215
                                 ALAUNIAN   LT19n            M. postera
                                            LT18r  H. hogarti
                                            LT17r-           E. spiculata
                                            18n  C. bicrenatus  M. medionorica     217.3          TNo3
                                                  J. magnus
                          LATE  NORIAN      LT17n           E. triangularis -
                  220                       LT16r           N. hallstattensis                        220
                       C                          M.paulckei
                                           LT14n-                                  222.5          TNo2
                                  LACIAN    16n             E. quadrata (?)
                       TRIASSI              LT13n  G. jandianus  M. communisti     226.5          TNo1
                  225                       LT13r                                                    225



                                            LT12r
                  230            TUVALIAN   LT12n  A. spinosus  C. pseudodiebeli   229            TCa3  230
                                            LT11n
                                                              C. zoae
                                            LT10r
                              CARNIAN       LT10n  T. subbullatus  P.. postinclinata ?-  233.5  Short-term  TCa2
                                                            M. carpathicus
                                                                                       curve
                                                   T. dilleri
                                                             P. noah I.Z.
                                            LT4r
                                                             G. tethydis -
                                                  T. aonoides
                  235             JULIAN    LT3r  A. austriacum  P. postinclinata                    235
                                            LT2n
                                CORDEVOLIAN        T. aon     B diebeli-           236.2          TCa1
                                            LT1n  D. canadensis  Q polygnathiformis
                                                            Budurovignathus        238            TLa3
                                                 F. regoledanus
                                            MT13
                                                             n. sp. (Kozur)
                              LADINIAN     MT11n  P. longobardicum  B mungoensis   239.5          TLa2
                               LONGOBARDIAN
                                                  P. neumayri
                                            MT11r
                                                  E. gredleri
                                                             B. hungaricus
                  240            FASSANIAN  MT9n  P. margitosum  P.? trammeri trammeri-  240.8    TLa1  240
                                                             B. truempyi
                          MIDDLE  ILLYRIAN  MT7n  K. felsoeoersensis  P.? trammeri trammeri-  242.1  TAn4
                                                  E. curionii
                                            MT9r
                                                             N. aequidentata
                                                 N. secedensis
                                                              P.alpina
                                                   R. reitzi
                                                           P. alpina- P.? trammeri
                                                             praetrammeri
                                            MT6r
                              ANISIAN  PELSONIAN  MT4r-  S. binodosus  N. constricta  243.5       TAn3
                                                            N. mesotriassica
                                                  P. trinodosus
                                                             P. bifurcata
                                            5r
                                                  B. balatonicus
                                                   Kocaella
                                            MT4n
                                                             P. bulgarica
                  245            BITHYNIAN      Paracrochordiceras (Nev.)  (N. germanica and  244.7  TAn2  245
                                                 L. caurus (Nev.)
                                                  P. guexi (Nev.)
                                 AEGEAN     MT3n  S. mulleri (Nev.)  N. kockeli s.z.)  245.5      TAn1
                                                   J. welteri
                                            MT1-2  Subcolumbites  C. gondolelloides  246.9        TOl2
                                                   N. haugi
                                                              N.? regalis
                                           ET9r-MT3r
                                            ET8n-
                                                             C.  timorensis
                                 SPATHIAN
                                                  Procolumbites
                                            9n
                                                                                                  TOl1
                                                  C. parisianus
                                                                                   247.9
                                                             T. sosioensis
                                                 Columbites - Tirolites
                          EARLY  OLENE-  KIAN  SMITHIAN  ET5n-  B. compressus-F. flemingianus  B. buurensis-S. milleri
                                                              I. collinsoni
                                                G. sinuatum - W. distractus
                                            7n
                                                            N. pingdingshanensis
                                                   Owenites
                                                              N. waageni
                                                   R. rohilla
                  250            DIENERIAN  ET2n  F. bhargavai - Kashmiritidae   N. dieneri Morph 3   250  TIn3  250
                                                  V. cf. pulchrum
                             IND-  UAN  GRIESBACHIAN  P. planidorsatus  Isarcicella isarcica  250.8  TIn2
                                                              S. kummeli
                                                  P. rotundatus
                                                              C. krystyni
                                                  G. frequens
                                                  O. tibeticum
                                  251.9     ET1n  O. woodwardi  Hindeodus parvus   251.9          TIn1
                                                             C. meishanensis
                                                  O. fissisellatum  C. yini        252.6          PCh2
                         [PERMIAN]               H. changxingense
                                                                                   253.5          PCh1
                  Bilal U. Haq (2018)                                             MAJOR CYCLE BOUNDARY
                                                                                  MEDIUM OR MINOR CYCLE BOUNDARY
                                                                                  POTENTIAL CYCLE BD. (NOT YET CONFIRMED)
                                                 www.geosociety.org/gsatoday                                       7
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