OBRUCHEVELLA, A CYANOBACTERIUM FROM UPPER PROTEROZOIC OF CONGO - IMPLICATIONS IN THE PROBLEM OF AGE OF THE SCHISTO-CALCAIRE GROUP AND OF THE UPPER PROTEROZOIC GLACIATION

Citation
P. Alvarez et al., OBRUCHEVELLA, A CYANOBACTERIUM FROM UPPER PROTEROZOIC OF CONGO - IMPLICATIONS IN THE PROBLEM OF AGE OF THE SCHISTO-CALCAIRE GROUP AND OF THE UPPER PROTEROZOIC GLACIATION, Comptes rendus de l'Academie des sciences. Serie II. Mecanique, physique, chimie, astronomie, 320(7), 1995, pp. 639-646
Citations number
27
Categorie Soggetti
Multidisciplinary Sciences
ISSN journal
12518069
Volume
320
Issue
7
Year of publication
1995
Part
2
Pages
639 - 646
Database
ISI
SICI code
1251-8069(1995)320:7<639:OACFUP>2.0.ZU;2-1
Abstract
The Schisto-calcaire Group of the Proterozoic sedimentary cover of the Central Africa Craton rests upon the Diamictite superieure Formation (Cryogenian). Some data suggest an early Neoproterozoic III age (betwe en 650 and 630 Ma) for this Group, In Congo, a microfossil assemblage has been detected in talc oolites and intraclasts from the Oolithe de Kisantu Formation of the Schisto-calcaire Group. It includes several s pecies of the filamentous cyanobacterium Obruchevella Reitlinger. This assemblage has been reported in a number of regions near the Precambr ian-Cambrian boundary. Therefore the stratigraphic position of the Sch isto-calcaire Group and of the Diamictite superieure Formation must be reconsidered.