Postmasburg Karoo Basin Cape Fold Belt Gr
Period:
Rhyacian
Age Interval:
Province:
Southern Africa
Type Locality and Naming
Column: Karoo Basin Cape Fold Belt
Lithology and Thickness
Postmasburg Gr:
LITHOLOGY = Intervals of shales and quartzites with some volcanics
CALIBRATION = From Walraven's digram (assigned 47% up from 2500Ma).
REFERENCE = 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
LITHOLOGY = Intervals of shales and quartzites with some volcanics
CALIBRATION = From Walraven's digram (assigned 47% up from 2500Ma).
REFERENCE = 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
Lithology Pattern:
Sandy claystone
Relationships and Distribution
Lower contact
Upper contact
Regional extent
GeoJSON
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Fossils
Age
Age Span:
Beginning stage:
Rhyacian
Fraction up in beginning stage:
0.14
Beginning date (Ma):
2,265.00
Ending stage:
Rhyacian
Fraction up in the ending stage:
0.3
Ending date (Ma):
2,225.00
Depositional setting
Depositional pattern:
Additional Information
long: 25 lat: -30
Compiler: