Early Permian silicified floras from the Perdasdefogu Basin (SE Sardinia): comparison and bio-chronostratigraphic correlation with the floras of the Autun Basin (Massif central, France)

descriptionPublicationkeyboard_double_arrow_right Article 01 Mar 2011 France, Italy English Publisher:Museum National d'Histoire Naturelle, Paris, FranceJournal:Geodiversitas, volume 33, pages 43-69 (issn: 1280-9659, eissn: 1638-9395,

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Authors: Galtier, Jean; Ronchi, Ausonio; Broutin, Jean;

doi: 10.5252/g2011n1a4

handle: 11571/227246

Early Permian silicified floras from the Perdasdefogu Basin (SE Sardinia): comparison and bio-chronostratigraphic correlation with the floras of the Autun Basin (Massif central, France)

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Abstract

ABSTRACT In the Perdasdefogu Basin (Ogliastra, Sardinia) plants occurring in angular cherts are preserved as siliceous permineralizations. The plant assemblage consists of the genera Sphenophyllum, Arthropitys, Astromyelon, Palaeostachya, Pecopteris, Scolecopteris, Stewartiopteris, Psaronius, Ankyropteris, Anachoropteris; furthermore, probable medullosan wood and ovules, cordaitean stems, leaves and ovules, and Dadoxylon wood have been recorded. Arborescent marratialean ferns are the dominant elements with Pecopteris and Scolecopteris leaves being the most common; the calamiteans are the second in abundance. Generally the chert blocks contain a large number of plant fragments — roots and leaves are being almost equally represented — suggestive of a coal ball-like plant accumulation. More rarely a chert block may consist of a single plant part, for example a piece of wood. The preservation and accumulation of the plants are closely comparable to the silicified plant assemblages described from the Lower Per...

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Keywords

[SDE.BE.EVO] Environmental Sciences/Biodiversity and Ecology/domain_sde.be.evo, EARLY PERMIAN, 550, Cordaitaceae, Biodiversité et Ecologie, Cordaitales (awaiting allocation), Flores silicifiées, Cycadales (awaiting allocation), Polypodiopsida, Plantae, Psalixochlaenaceae, Tedeleaceae, Permien basal, compression macrofloras, Calamitaceae, Sphenophyllales, Cycadales, Biodiversity, Autunian, Macro flores en compression, SDE:BE:EVO, SILICIFIED FLORAS, Cordaitales, Autunien, Early Permian, Sardaigne, Pinales, Sardinia, Zygopteridales, Equisetales, Marattiales, Biodiversity and Ecology, [SDE.BE.EVO]Environmental Sciences/Biodiversity and Ecology/domain_sde.be.evo, AUTUNIAN, Taxonomy, Asterothecaceae, 580, Silicified floras, Pinopsida, [SDE.BE] Environmental Sciences/Biodiversity and Ecology, Tracheophyta, Sphenophyllaceae, Cycadopsida, SARDINIA, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Araucariaceae, Silicified floras;Autunian;Early Permian;Sardinia;compression macrofloras;Flores silicifiées;Autunien;Permien basal;Sardaigne;Macro flores en compression

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