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Additional info 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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S p . , K. decipiens S p a t h , K. parvula n. , K. percostata n. , K. perplanata n. , K. rotunda n. , K. n. sp. A, K. n. sp. 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.

Spitiense ( U h l i g ) , P. sp. indet. ( M ) , Katroliceras sp. indet. ( m ) , q u e l q u e s Blanfordiceras s p . et Kossmatia tenuistriata ( G r a y ) , ? Gymnodiscoceras acuticinctum ( S t r a c h e y ) et G. s p . indet. - D Z 4 : ravin en c o n t r e b a s de la piste de M u k t i n a t h au col 4 0 0 0 : petits n o d u l e s à O p p é l i i d é s et Virgatosphinctes (s. ) n. s p . A ( m ) . - C H 7 : Haplophylloceras strigile ( B l a n f o r d ) , Paraboliceras haugi U h l i g , P. cf. spitiense ( U h l i g ) , P.

Un autre ravin qui rejoint d i r e c t e m e n t la N u p r a K h o l a ( 6 ) , en d e h o r s du plateau et à l'est d e la ligne de crête qui délimite le b a s s i n d ' a l i m e n t a t i o n , a livré des faunes intéressantes, p r o b a b l e m e n t séparé p a r une faille des affleurements précédents. est d é c o u p é e par des failles de d é c r o c h e m e n t en p a n neaux plus ou m o i n s r e d r e s s é s . L e c o n t a c t a v e c les Schistes de Spiti est t e c t o n i q u e (faille directe ou d é c o l l e m e n t ) et la série débute par les niveaux à Paraboliceras (fig.

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Les faunes d'ammonites de l'Oxfordien au Tithonien et la biostratigraphie des Spiti-shales (Callovien supérieur-Tithonien) de Thakkhola, Népal central by Enay R.


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