Pebbly Arkose Formation
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| Pebbly Arkose | |
|---|---|
| Stratigraphic range: Carnian ~ | |
| File:Pebbly-arkose-kariba.png Pebbly arkose outcrop, Ndepa hill, Kariba District, Zimbabwe | |
| Type | Geological formation |
| Unit of | Upper Karoo Group, Karoo Supergroup |
| Underlies | Forest Sandstone |
| Overlies | Escarpment Grit & Angwa Sandstone |
| Lithology | |
| Primary | Sandstone |
| Location | |
| Coordinates | Lua error in Module:Coordinates at line 489: attempt to index field 'wikibase' (a nil value). |
| Approximate paleocoordinates | Lua error: callParserFunction: function "#coordinates" was not found. |
| Region | Mashonaland Central & West |
| Country | Botswana Zambia Zimbabwe |
| Type section | |
| Named for | Descriptive name |
| Named by | A.M. MacGregor, Zimbabwe Geological Survey |
Pebbly Arkose Formation (Africa) Pebbly Arkose Formation (Zimbabwe) | |
The Pebbly Arkose Formation is a Late Triassic geologic formation found in southern Africa.
Geology
[edit | edit source]Description
[edit | edit source]The formation comprises mainly coarse, arkosic sandstones.[1]
Extent
[edit | edit source]The Pebbly Arkose Formation is found in Botswana, Zambia and Zimbabwe, in the Mid-Zambezi, Mana Pools, Cabora Bassa and Limpopo basins.
Stratigraphy
[edit | edit source]The Pebbly Arkose Formation is part of the Upper Karoo Group, overlies the Escarpment formation (in the Mid-Zambezi and Limpopo basins)[2] and the Angwa Sandstone Formation (in the Mana Pools and Cabora Bassa Basins)[3] and underlies the Forest Sandstone Formation.[4]
The Pebbly Arkose has been correlated to the Elliot Formation of the Great Karroo Basin, South Africa[4][5] and the Mpandi Formation of the Thuli Basin in Botswana and Zimbabwe.[6]
Fossil content
[edit | edit source]Flora
[edit | edit source]| Pinales of the Pebbly Arkose Formation | ||||
|---|---|---|---|---|
| Taxa | Presence | Notes | Images | |
| Form genus: Dadoxylon | Widespread in the formation[7] | |||
Vertebrate fauna
[edit | edit source]Archosaur
[edit | edit source]| Archosaurs of the Pebbly Arkose Formation | |||||
|---|---|---|---|---|---|
| Taxon | Species | Presence | Materials | Notes | Images |
| Mbiresaurus[8] | M. raathi | Dande Communal Land. | A complete partially-articulated skeleton. | An early member of Sauropodomorpha | |
| Musankwa[9] | M. sanyatiensis | Spurwing Island. | An articulated partial right leg. | A basal massopodan sauropodomorph |
|
| Massospondylus | M. sp. | Spurwing Island. | A basal sauropodomorph. | ||
| Aetosaur[8] | Indeterminate. | ||||
| Herrerasaurid[8] | Indeterminate | Dande Communal Land. | |||
Reptiles
[edit | edit source]| Rhynchosauria of the Pebbly Arkose Formation | |||||
|---|---|---|---|---|---|
| Taxon | Species | Presence | Materials | Notes | Images |
| Hyperodapedon[10] | Dande, Mbire District, Zimbabwe[10] | ||||
Synapsids
[edit | edit source]| Synapsida of the Pebbly Arkose Formation | |||||
|---|---|---|---|---|---|
| Taxon | Species | Presence | Materials | Notes | Images |
| Dicynodontia | Indeterminate. | A possible dicynodont[8] | |||
| Gomphodontosuchine[8] | A traversodontid cynodont. | ||||
Fish
[edit | edit source]| Fish of the Pebbly Arkose Formation | |||||
|---|---|---|---|---|---|
| Taxon | Species | Presence | Materials | Notes | Images |
| Ferganoceratodus[11] | F. edwardsi | A ceratodontiform lungfish | |||
See also
[edit | edit source]- List of dinosaur-bearing rock formations
- List of fossiliferous stratigraphic units in Zimbabwe
- Geology of Zimbabwe
- Molteno Formation
References
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Bibliography
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