Bidi Fm
Period:
Cambrian
Age Interval:
530–530 Ma
Province:
West Congo Basin / Bas-Congo region, DRC
Type Locality and Naming
Synonym:
Reference section:
Lithology and Thickness
arkosic conglomerate with quartz, quartzite, chert, carbonate and shale clasts Thickness: ≤ 15 m.
Lithology Pattern:
Aus conglomerate
Relationships and Distribution
Lower contact
Upper contact
Overlain by the Fulu Fm.
Regional extent
West Congo Belt (DRC, Republic of Congo, Gabon, NW Angola).
GeoJSON
{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[10.77,-1.12],[10.9,-1.26],[10.96,-1.41],[10.97,-1.63],[10.99,-1.85],[11.12,-2.02],[11.48,-2.31],[11.78,-2.6],[12.05,-2.82],[12.39,-3.13],[12.86,-3.54],[13.07,-3.66],[13.34,-3.84],[13.56,-3.98],[13.89,-4.3],[14.16,-4.74],[14.24,-5.01],[14.26,-5.32],[14.31,-5.76],[14.41,-5.98],[14.57,-6.31],[14.78,-6.6],[14.99,-6.9],[15.23,-7.22],[15.58,-7.85],[15.64,-8.08],[15.62,-8.5],[15.5,-8.7],[15.19,-8.87],[14.89,-8.84],[14.67,-8.73],[14.55,-8.45],[14.33,-8.11],[14.16,-7.75],[13.95,-7.59],[13.75,-7.36],[13.69,-6.93],[13.68,-6.68],[13.65,-6.33],[13.51,-6.04],[13.39,-5.67],[13.3,-5.34],[13.15,-5.06],[12.98,-4.81],[12.83,-4.72],[12.61,-4.59],[12.44,-4.39],[12.26,-4.27],[11.96,-4.02],[11.8,-3.76],[11.59,-3.65],[11.32,-3.51],[11.21,-3.36],[11.37,-3.32],[11.51,-3.21],[11.24,-2.97],[11.07,-2.82],[10.87,-2.52],[10.71,-2.14],[10.66,-1.92],[10.64,-1.57],[10.64,-1.29],[10.73,-1.18],[10.73,-1.18],[10.73,-1.18],[10.77,-1.16],[10.77,-1.16],[10.77,-1.12]]]]}}
Fossils
Age
Anchor age at base of Inkisi Group; interpolated by thickness (15m of 990m) between 510–530 Ma
Age Span:
Beginning stage:
Fortunian
Fraction up in beginning stage:
0.93
Beginning date (Ma):
529.69
Ending stage:
Fortunian
Fraction up in the ending stage:
0.90
Ending date (Ma):
529.98
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.