Ventersdorp Gr
Period:
Neoarchean
Age Interval:
Early Neoarchean
Province:
Karoo Basin
Type Locality and Naming
Lithology and Thickness
Lithology Pattern:
Volcanics
Relationships and Distribution
Lower contact
Upper contact
Major hiatus (ca. 200 Myr), then unconformably overlain by the volcanics of the Grobersdal Gr.
Regional extent
GeoJSON
null
Fossils
Age
From Kent and Hugo's diagram (base assigned 2750 Ma = ca. 65% up from 3000 Ma to base of major gap at 2675 Ma) = ca. 2750 to 2675 Ma span
Age Span:
Beginning stage:
Neoarchean
Fraction up in beginning stage:
0.167
Beginning date (Ma):
2,749.90
Ending stage:
Neoarchean
Fraction up in the ending stage:
0.417
Ending date (Ma):
2,674.90
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Rebecca Bobick (and Wen Du), modified from Walraven, F., Armstrong, R.A., and Kruger, F.J., A chronostratigraphic framework for the north-central Kaapvaal craton, the Bushveld Complex and the Vredefort structure, Tectonophysics, 171 (1990), 23-48.