File:Cycle émersif Musandam.jpg
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Summary
| Description | Français : Cycles émersifs métriques de comblement (allo et autocycliques ?) arrangés en séquences décamétriques séparées par des discontinuités (en jaune) dans le Mésozoique de la Péninsule du Musandam (Oman). Des tentatives de corrélaton des séquences se sont soldées par un échec, après contrôle biostratigraphique de l'auteur par les foraminifères (en collaboration avec le BRGM, comm. pers. 1992). Pour un cadre biostrati. détaillé, voir Septfontaine & de Matos (1998). Il faut donc manier l'outil séquentiel avec la plus grande prudence lorsque le cadre biostrati. est trop rudimentaire, comme dans le Jur. sup.-Crét. inf. de la plate-forme jurassienne (Strasser et coll. etc.) où des corrélations dites de "haute résolution" ne sont qu'une illusion, dans un cadre tectoniquement très perturbé. Unknown shallowing upward metric sequences arranged in decametric sequences separated by parallel disconformities (yellow) in the mesozoic lagoonal deposits of the musandam peninsula (oman). tentatives of correlations of major discontinuities were unsucessfull, after biostratigraphical control by the author (in coll. with brgm, pers. comm.,1992). see also septfontaine & de matos (1998) for stratigraphical setting in abhu dhabi. metric and decametric sequences can not be used for "high resolution" strati. and correlation (srasser et al. in the jura platform, etc.) without a strict and detailed biostratigraphical scale, which is unfortunately defficient in shallow water deposits of upper jur. and lower cret. of the jura, due to the scarcity of usefull taxa. |
| Date | |
| Source | Own work |
| Author | Septfontaine |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:30, 24 March 2012 | | 1,643 × 2,464 (2.86 MB) | Septfontaine |
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