Mayumbian Gr
Period:
Tonian
Age Interval:
850–912 Ma
Province:
West Congo Basin / Bas-Congo region, DRC
Type Locality and Naming
Synonym:
Reference section:
Lithology and Thickness
volcano-plutonic felsic sequence: metarhyolites, volcano-sedimentary sequences Thickness: 3000–4000 m.
Lithology Pattern:
Granitic
Relationships and Distribution
Lower contact
Underlain by the Zadinian Fm.
Upper contact
Overlain by the S0 Fm.
Regional extent
West Congo Belt (DRC, Republic of Congo, Gabon, NW Angola).
GeoJSON
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Fossils
Age
Anchor age of 912 ± 7 Ma (Tack et al., 2001)
Age Span:
Beginning stage:
Tonian
Fraction up in beginning stage:
0.54
Beginning date (Ma):
848.80
Ending stage:
Tonian
Fraction up in the ending stage:
0.31
Ending date (Ma):
913.20
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Cailteux, J.L.H., Delpomdor, F.R.A., & Ngoie Ndobani, J.-P. (2015). The Neoproterozoic West-Congo 'Schisto-Calcaire' sedimentary succession from the Bas-Congo region (Democratic Republic of the Congo) in the frame of regional tentative correlations. Geologica Belgica, 18/2-4, 126–146.