Koonap Fm
Period:
Permian
Age Interval:
Middle Permian (Kazanian)
Province:
SouthAfrica-Namibia-Botswana
Type Locality and Naming
Main Karoo Basin, South Africa. Named after the Koonap River in the Eastern Cape. It represents the basal unit of the Adelaide Subgroup in the south. Lowermost formation in Beaufort Gr
Synonym:
Lithology and Thickness
Fluvial mudstones and sandstones
Lithology Pattern:
Claystone
Relationships and Distribution
Lower contact
Conformably overlies the shallow marine/coastal deposits of the Waterford Fm (uppermost Ecca Group), marking the transition from marine/deltaic to fully terrestrial environments
Upper contact
Conformably overlain by the fluvial mudstones and sandstones of the Middleton Fm
Regional extent
Correlates with the Abrahamskraal Fm in the western and central parts of the Main Karoo Basin.
GeoJSON
null
Fossils
Age
Middle Permian (Kazanian)
Age Span:
Beginning stage:
Wordian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
269.21
Ending stage:
Wordian
Fraction up in the ending stage:
0.5
Ending date (Ma):
266.78
Depositional setting
Terrestrial, low-sinuosity fluvial systems and associated marshy floodplains.
Depositional pattern:
Additional Information
Compiler:
From the O. Catuneanu et al. / Journal of African Earth Sciences 43 (2005) 211–253