Colloque sur la limite Jurassique-Crétacé. Lyon, Neuchâtel,

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Additional resources for Colloque sur la limite Jurassique-Crétacé. Lyon, Neuchâtel, septembre 1973

Example text

D ' a p r è s L E HÉGARAT G . ( 1 9 7 3 ) , B. privasensis indique la sous-zone moyenne de la zone à Occitanica, d'âge berriasien, cependant que B. ) richteri l'accompagne. D ' a u t r e part, les Calpionelles reconnues dans les mêmes assises indiquent que l ' o n se trouve dans la zone C . FIG. 10. , 1967). Au-dessus de l'horizon basai viennent des dépôts carbonates et terrigènes représentés par une alternance de lits minces de calcaires, de marnes et de grès. L e s D a n s la partie la plus élevée de ces calcaires o n ne rencontre p a s d ' A m m o n i t e s , m a i s les plaques minces livrent à la fois des Calpionelles: Calpionellopsis simplex (COLOM), C.

Elliptica CADISCH, Calpionellopsis darderi COLOM, Tintinnopsella carpathica ( M U R G . ), Amphorelina OUEST, LE « BANC SILICEUX SUPÉRIEUR » S'OBSERVE ENTRE LES « CALCAIRES PORCELLANÉS » DU BERRIASIEN-VALANGINIEN subacuta COLOM, A. lanceolata ET LES CALCAIRES DU JURASSIQUE INFÉRIEUR QU'IL SURMONTE COLOM AINSI QUE BEAU- STRUCTURE ANTICLINALE DE BOGAZ (FIG. , MEÇO EN DISCONTINUITÉ. , XHOMO — A. PLUS HAUT, LA COUPE SE CONTINUE AVEC DES CALCAIRES CELLANÉS » REPOSENT DIRECTEMENT SUR LES CALCAIRES DU BIOMICRITIQUES ET BIOPELMICRITIQUES, UN PEU MARNEUX, JURASSIQUE INFÉRIEUR PAR SUITE D'UNE DISCONTINUITÉ PLUS EN BANCS ÉPAIS, GRIS CLAIR, RICHES EN Bankia IMPORTANTE.

Abnorme Durangites n. sp. Micracanthoceras microcanthum | Aulacosphinctes morikeanm Aulacosphinctes gr. spitiensis Simoceras volanense Lemencia ciliata Semiformiceras fallauxi Virgatosimoceras gr. rothpletzi "Kossmatia" richteri Aspidoceras neoburgense Haploceras carachtheis Subplanitoides gr. contiguus Lemencia gr. pseudorichteri Simoceras n. sp. gr. volanense Semiformiceras semiforme Virgatosimoceras achiardii Pseudolissoceras gr. bavaricum Aspidoceras rogoznicense Haploceras verruciferum Haploceras elimatum Virgatosimoceras sp.

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