Calcitic radial palisadic fabric in freshwater stromatolites: diagenetic and recrystallized feature or physicochemical sinter crust?

Détails

ID Serval
serval:BIB_124862E35A59
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Calcitic radial palisadic fabric in freshwater stromatolites: diagenetic and recrystallized feature or physicochemical sinter crust?
Périodique
Sedimentary Geology
Auteur(s)
Freytet P., Verrecchia E.P.
ISSN
0037-0738
Statut éditorial
Publié
Date de publication
1999
Peer-reviewed
Oui
Volume
126
Pages
97-102
Langue
anglais
Résumé
When favorable conditions occur for carbonate precipitation (physicochemical processes) in tufas and travertines, organisms intervene either directly (the framework created by organisms acts as a crystal support) or indirectly (organic products influencing the mineralogy, nucleation, growth and habit of primary crystals). In the literature, fluvial and travertine crystalline sparite crusts with palisadic or prismatic crystals are generally interpreted as the result of early recrystallization of micrite in algal buildups (mostly composed of Schizothrix). Therefore, biological mediation is essential for the construction of continental bioherms and biotromes, even if organic remains are frequent in micrite and primary sparites, and rare or totally absent in secondary sparites.
Mots-clé
Calcite, Cyanobacteria, Diagenesis, Freshwater stromatolites, Palisadic fabric
Création de la notice
13/01/2010 9:23
Dernière modification de la notice
20/08/2019 12:40
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