Drakensberg basalt Fm
Period:
Jurassic
Age Interval:
Toarcian
Province:
Karoo Basin
Type Locality and Naming
Karoo Basin
Synonym:
Lithology and Thickness
The flood basalts are recognized as four provinces: tholeiitic lavas, olivine-poor basalts and acid lavas, olivine rich basalts, and silica-rich basalts and latites.
Lithology Pattern:
Lava
Relationships and Distribution
Lower contact
Upper contact
[not given]
Regional extent
Karoo Basin
GeoJSON
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Fossils
Age
Radio-isotropic age estimated at approximately 182.7 ± 0.7 Ma.
Age Span:
Beginning stage:
Toarcian
Fraction up in beginning stage:
0.16
Beginning date (Ma):
182.68
Ending stage:
Toarcian
Fraction up in the ending stage:
0.26
Ending date (Ma):
181.73
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Rebecca Bobick (and Wen Du), modified from Jourdan et al., 2007; Svensen et al., 2007