Morskie osady plejstoceńskie w Hergli (Sahel - Tunezja): znaczenie dwóch okresów wysokiego poziomu wód morskich w czasie ostatniego interglacjału

• Autorzy: Jedoui Y.

Warianty tytułu

EN

Marine pleistocene sediments in Hergla (Sahel - Tunisia): record of two high sea level phases during the last interglacial period

• Języki publikacji: PL

Abstrakty

EN

The aim of the research was to assess importance of two high sea level phases during the last interglacial period in Tunisia. The research was based on analysis of structure and petrography of marine sediments in a vicinity of Hergla by the Hammamet bay. The article describes consecutive sediment facies deposited during the upper Pleistocene, which allowed to reconstruct former sea limit. Two overlapping recessional sequences of a different origin (from subtidal to aeolian) were discovered. Sediments constituting these sequences consist of usually well rounded quartz grains and calcareous cement. These two sequences, separated by an erosional surface, were developed during two different phases of high sea level (much higher than today). The sediments were cemented in a fresh-water environment after their deposition, during progradation of the sea-shore. The researched sediments in the vicinity of Hergla are similar to coastal sediments found in the vicinity of Mahdia and also in other places along the southern part of Tunisian coast. This justifies the obtained conclusion. Lack of petrographical differentiation between the two sediment sequences in the vicinity of Hergla (which is not the case in southern Tunisia) is explained by an intensive supply of terrigenous material to the sea coast by the El Medjini Wadi during the upper Pleistocene.

• Wydawca: -
• Czasopismo: Prace i Studia Geograficzne
• Rocznik: 2006
• Tom: 37
• Opis fizyczny: s.161-172,rys.,tab.,fot.,, bibliogr.

Twórcy

autor

Jedoui Y.

• Wydział Geologii, Wyższa Szkoła Inżynierska w Sfaksie, Tunezja

Bibliografia

• Ahlbrandt T.S., Andrews S., Gwynne D.T., 1978. Bioturbation in eolian deposits. Sediment. J. Petrology, 48, 3, 839-848.
• Aigner T., 1982. Calcareous tempestites: storm-dominated stratification in Upper Muschelkalk limestones (Middle Trias, SW Germany). [w:] Einsele G. et Seilacher A. (red.): Cyclic Events and stratification. Springer Verlag, 180-198.
• Allen J.R.L., 1970. Physical processes of sedimentation. George Allen & Unwin, London.
• Allen J.R.L., 1985. Sedimentary structures. Their character and physical basis. Developments in Sedimentology, 30, Elsevier Science, New York.
• Barrot J., 1972. Les enseignements du modelé quaternaire de la sebkhet Halk el Menzel (Sahel de Sousse, Tunisie). Bull. Soc. Languedocienne Geogr., 6, 3, 277-304.
• Bonifay E., Mars P., 1959. Le Tyrrhénien dans le cadre de la chronologie quaternaire méditerranéenne. Bull. Soc. Géol. Fr., série 7, 1, 1, 62-78.
• Clifton H.E., Thompson J.K., 1978. Macharodchnus segregatis: afeeding structure of shallow marine polychaetes J. Sediment. Petrology., 48, 1293-1302.
• Curran H.A., 1985. The trace fossil assemblage of a Cretaceous nearshore environment: Englishtown Formation of Delaware. U.S.A. Spec. Publ. Soc. Econ. Paleont. Mineral. 35, 261-276.
• Davidson R.G., Greenwood B., 1976. Facies relationships on a barred coast, Kouchibouguac Bay, New Brunswick, Canada. Spec. Publ. Soc. Econ. Paleont. Mineral., 24, 149-168.
• Dunham R.J., 1970. Keystone vugs in carbonate beach deposits (abstract). A.A.PG.. Bull., 54.
• Herm D., Paskoff R., Sanlaville P., 1980. La stratigraphie des falaises d'Hergla (Sahel de Sousse, Tunisie) et son importance pour la compréhension du Quaternaire marin récent de la Tunisie. C.R. Somm. Soc. Geol. Fr., 1, 25-28.
• Howard J.D., Reineck H.E., 1981. Depositional facies of high-energy beach-to-offshore sequence : comparison with low energy sequence. Bull. Amer. Assoc. Petroleum Geol., 65,807-830.
• Jedoui, Y., 2000. Sédimentologie et géochronologie des dépêts littoraux quaternaires: reconstitution des variations des paléoclimats et du niveau marin dans le Sud-Est tunisien. Thèse de Doctorat d'Etat des-Sciences géologiques, Faculté des Sciences, Tunis.
• Jedoui Y., Davaud E., Ben Ismad'l H., Reyss J.L., 2002. Analyse sédimentologique des dépôts marins pléistocènes du Sud-Est tunisien: mise en évidence de deux périodes de haut niveau marin pendant le sous-stade isotopique marin 5e (Eémien, Tyrrhénien). Bull. Soc. Géol. Fr., 173, 3, 63-72.
• Jedoui Y., Reyss J.L., Kallel N., Montacer M., Ben Ismad'l H., Davaud E., 2003. U-series evidence for two high Last Interglacial sea levels in southeastern Tunisia. Quaternary Science Reviews, 22, 343-351.
• Kreisa R.D., Bambach R.K., 1982. The role of storm processes in generating shell debs in Paleozoic shelf environments. [w:] Einsele G. et Seilacher A. (red.): Cyclic Events and stratification. Springer Verlag, 180-198.
• Kumar N., Sanders J.E., 1976. Characteristics of shoreface storm deposits : modern and ancient examples. J. Sediment. Petrology, 46/1, 145-162.
• Leckie D.A., Walter R.G., 1982. Storm and tide dominated shoreline in Cretaceous Moosebar-Lower gates intervaloutcrop equivalents of Deep Basin gas trap in Western Canada. Bull. Amer. Assoc. Petroleum Geol., 66, 138-157.
• Longman M.W., 1980. Carbonate diagenetic textures from nearsurface diagenetic environments. A.A.P.G. Bull., 64, 461-487.
• Mahmoudi M., 1986. Stratigraphie, Sédimentologie et Diagenèse des dépôts tyrrhéniens du Sahel tunisien. Thèse de 3e cycle, Univ. Orsay.
• Mahmoudi M., 1988. Nouvelle proposition de subdivisions stratigraphiques des dépôts attribués au Tyrrhénien en Tunisie (Région de Monastir). Bull. Soc. Géol. Fr., 8, IV, 3, 431-435.
• Me Crory V.L., Walker R.G., 1986. A storm and tidally intluenced prograding shoreline: upper Cretaceous Milk River Formation of Southern Alberta, Canada. Sedimentology, 33, 47-60.
• Paskoff R., Sanlaville P., 1976. Sur le Quaternaire marin de la région de Mahdia; Sahel de Sousse, Tunisie. C. R. Acad. Sc., Paris, t. 283, Série D, 1715-1718.
• Paskoff R., Sanlaville P., 1983. Les côtes de la Tunisie: variation du niveau marin depuis le Tyrrhenien. Ed. Maison de l'orient, Lyon.
• Perthuisot J.P., Floridia S., 1973. Carte géologique de la sebkha el Melah et de ses bordures. Trav. Lab. Géol. E.N.S., Paris, 8.
• Schwartz R.K., 1982. Bedform and stratification characteristics of some modern small-scale washover and bodies. Sedimentology, 29, 6, 835-850.
• Winland H.D., 1971. Nonskeletal deposition of high-Mg calcite in the marine environment and its role in the retention of textures. [w:] Carbonate cements, Bricker (red.), Johns Hopkins Univ. Studies Geol., 19, 278-284.