6533b85cfe1ef96bd12bc72b
RESEARCH PRODUCT
Etude expérimentale de la lamination des stromatolithes à Rivularia haematites en climat tempéré: édification des lamines micritiques
Christiane CaudwellAndré PascalJacques Langsubject
Rivulariaceaefood.ingredientMaterials scienceMicritebiologyRivulariaMineralogyOcean Engineeringbiology.organism_classificationLamination (geology)foodStromatoliteSeasonal cycleEcology Evolution Behavior and Systematicsdescription
The lamination of Rivularia haematites stromatolites (D.C.) Agardh was studied experimentally for 7 years. Micritic laminae are found to form in three stages: biological formation of dark laminae during the wet season, microsparitic calcification of these laminae in the form of clearly individualized polycrystalline aggregates and, finally, micritization of the latter by bacterial action. These three stages develop over 2 to 3 years. The occurrence of transverse, longitudinal and circular microfibrils in the outer sheath is thought to explain the nucleation and the three-dimensional structure of the microsparitic crystals of the dark laminae and of the polycrystalline aggregates.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1997-06-01 | Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science |