Orange Grove Fm
Period:
Mesoarchean
Age Interval:
late Mesoarchean (ca. 2980 Ma)
Province:
Karoo Basin
Type Locality and Naming
Synonym:
Lithology Pattern:
Sandstone
Relationships and Distribution
Lower contact
Dominion Gr (unconformable)
Upper contact
Parktown Fm (conformable)
Regional extent
GeoJSON
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Fossils
Age
28% up in the Randian => ca. 2980 to 2970 Ma
Age Span:
Beginning stage:
Mesoarchean
Fraction up in beginning stage:
0.55
Beginning date (Ma):
2,980.00
Ending stage:
Mesoarchean
Fraction up in the ending stage:
0.575
Ending date (Ma):
2,970.00
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.