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Zone Stage Bralower KN KN CC (Ma) et al. Gp Fm Nanno Events Nanno Images (1989) AF '98 M '12 PN '85

KN58 CC4 KN50B NK3B KN 59-60 136.8 R. wisei C. margerelii C. anfractus

Ratawi Shale CC3B R. wisei+ 138.61 Ma

KN61 Valanginian N. kamptneri minor, N. stein. minor

Early NK3A KN N. kamp. minor Z. xenotus H. irregularis Z. diplogramus, Z. xenotus* 139.77 62-63 Ratawi Lst Ma CC3A KN51 140.2 C. oblongata, T. verenae*

KN 64-65

Lower Cretaceous NK2B

Thamama Group N. compressus N. quadratus Nannoconus sp.

Late CC2

142.3 Minagish KN66 NK2A

R. angustiforata* 142.71 Ma

Berriasian NK1 CC1 A. infracretacea M. obtusus I. compactus

Early 143.86 Ma N. stein. steinmanii* KN52 KN67 NJKD A. infracretacea* 144.04 Ma N. stein. minor* 144.21 Ma

145.5 NJKC Makhul KN53 KN68 N. stein. minor ? T. samatus ?P. senaria Th NJKB (part) C. mexicana minor+ )LJXUH%HUULDVLDQWR9DODQJLQLDQFDOFDUHRXVQDQQRIRVVLOELRVWUDWLJUDSKLF]RQHVDQGHYHQWVRI RQVKRUH.XZDLWDUHD6WDJHDQG1.]RQHDIWHU%UDORZHUHWDO RSFLW%RZQHWDO .1 $)]RQHVDIWHU$O)DUHVHWDO  .10]RQHVDIWHU3DFNHUHWDO  &&]RQHVDIWHU3HUFK 1LHOVHQ    DSSHDUDQFH GLVDSSHDUDQFH

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Zone Stage Bown et al. (1988) Fm Nanno Events Nanno Images (Ma) Bralower et al. (1989) 145.5 NJKC (part) Makhul NJKB C. mexicana minor NJKA P. beckmanii

NJ20 Hith

150.8 Gotnia Evaporites D. striatusH. noeliae P. beckmanii Gotnia Non 155.6 NJ19 -evaporites Upper Jurassic L. crucicentralis+ 156.3 Ma

Nanno assemblages are 161.2 NJ14 dominated by W. barnesae, B. novumL. crucicentralis E. gallicus Najmah W. britannica, W. fossacincta and W. manivitiae. Genera NJ13 Stephanolithion is absent.

164.7 NJ12 B. novum+ C. superbusC. magharensis B. prinsii

NJ11

Bathonian Callovian Oxfordian Sargelu 167.7 Mid Jurassic C. magharensis+ 168.89 Ma W. manivitiae W. britannica W. britannica NJ10 W. contracta+ C. superbus+ 170.17 Ma

NJ9 Dhruma W. manivitiae* W. britannica (consistent) Bajocian Kimm. Tithonian

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