Occurrence of an in situ fern grove in the Aptian Douiret Formation, Tataouine area, South-Tunisia |
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Authors: | Mohamed Ouaja Marc Philippe |
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Institution: | a Faculté des sciences de Gabès, département de géologie, cité Erriadh-Zrig, 6072 Gabès, Tunisia b UMR CNRS 5276, laboratoire de géologie de Lyon : terre, planètes, environnement, université Lyon 1, 43, boulevard du 11-Novembre-1918, 69622 Villeurbanne cedex, France |
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Abstract: | A level with fern stumps was discovered in the Aptian Douiret Formation, South-Tunisia. These stumps are preserved as external moulds or casts, without any preservation of anatomical structures. These stumps are considered to be affiliated with the numerous fossil plants assigned to the fern genera Alstaettia and Piazopteris that are widely distributed in coeval strata from the same region, either as leaf imprints or as permineralized remains. The record of in situ fossil forests for the Southern Hemisphere reveals that their systematic components are different, i.e. mainly corystosperms and/or conifers, and rarely under tidal influence. The way this fern grove settled in a margino-littoral environment is discussed. |
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Keywords: | In situ stumps Ferns Aptian Douiret Formation Tunisia |
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