By Enay R.

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Extra resources for Les faunes d'ammonites de l'Oxfordien au Tithonien et la biostratigraphie des Spiti-shales (Callovien supérieur-Tithonien) de Thakkhola, Népal central

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Stevensia sp. indet. et les p r e m i è r e s Blanfordiceras [B. (Boehmiceras) latidoma ( U h l i g ) , B. n. sp. C ] , dont l ' a p p a r t e n a n c e à ce niveau n ' e s t pas a s s u r é e . - les niveaux à Malagasites n. gen. qui sont limités au ravin s e c o n d a i r e (fig. M e t 1 6 , 4 ) affluent du ravin principal et la partie aval du ravin nord (fig. 1 6 , 5 ) à l'entrée de la g o r g e de sortie du bassin d ' a l i m e n t a t i o n . Vers l ' a m o n t , très vite, o n r e t r o u v e les n i v e a u x à Paraboliceras, probab l e m e n t h o m o l o g u e s d e ceux du ravin affluent direct de la N u p r a K h o l a (fig.

Géol. Lyon, 2009, n° 166 Les difficultés et les p r o b l è m e s e n c o r e en suspens concernant les corrélations a v e c la N o u v e l l e - Z é l a n d e (voir p. 58) ne permettent pas d ' a r r ê t e r une opinion définitive, mais la question est p o s é e q u ' i l s ' a g i s s e d e M a y a i t i d é s kimméridgiens. inférieur, ces d e u x unités s é p a r é e s p a r une discontinuité a v e c lacune du B a t h o n i e n m o y e n et supérieur. , 1996). Au N é p a l , le c o n t a c t des Schistes de Spiti a v e c l ' O o l i t h e ferrugineuse est net, m a r q u é p a r une d i s c o n t i n u i t é , mais j a m a i s ravinant c o m m e r e p r é s e n t é par G r a d s t e i n et al.

B , K. sp. , Pachysphinctes aff. irregularis Collignon, Aulacosphinctoides holdhausi ( U h l i g ) , ? , Physodoceras aff. longaevum (Leanza), Rectoceramus sp. Les récoltes d e 1991 et 1994 permettent de séparer plusieurs niveaux qui sont précisés d a n s la partie biostratigraphie. L a suite de la succession n ' e s t pas visible, r e c o u v e r t e p a r les formations q u a t e r n a i r e s et t r o n q u é e par la faille qui fait r é a p p a r a î t r e les n i v e a u x à Paraboliceras dans le ravin n o r d (fig.

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