Contribution de l'étude exoscopique des quartz à la reconstitution paléogéographique des derniers épisodes du Quaternaire littoral du Congo |
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| Authors: | Pierre Giresse Loïc le Ribault |
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| Institution: | 1. Départment de Géologie, Faculté des Sciences, Université Marien NGouabai, B.P. 69, Brazzaville, R.P. Congo;2. Compagnie Française des Pétroles, 114 cours du Maréchal Galliéni, 33404 Talence Cedex, France |
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| Abstract: | The paleogeographic and particularly palaeoclimatic evolution in the Congo at the end of the Quaternary has been investigated thoroughly with a study of grain surfaces using the scanning electron microscope. The succession of distinct physicochemical environment marks is characterized with the help of other methods (radiocarbon, micropaleontology). During a still-existing tropical climate, arid periods are contemporaneous with regressive phases (eolian, fluviatile, or pedogenetic reliefs of the grains) and humid periods correspond to transgressive phases (infratidal, intertidal, deltaic, lagoonal marks). |
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