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The Elisabeth Bay Formation, alternatively spelled as Elizabeth Bay Formation, is an Early Miocene (Aquitanian to Burdigalian, around 21 Ma)[1] geologic formation in the Sperrgebiet, ǁKaras Region of southwestern Namibia, overlying the Blaubok Conglomerate.[2] The freshwater green and red siltstones, sandstones, intercalations of conglomerates and claystones of the formation were deposited in a fluvial environment,[3] infilling a paleovalley incised during the Oligocene low sea stand, which backfilled during the Burdigalian marine transgression.[1] The Elisabeth Bay Formation provides many fossil mammals, snakes and other reptiles.
| Elisabeth Bay Formation | |
|---|---|
| Stratigraphic range: Aquitanian-Burdigalian ~ | |
| Type | Geological formation |
| Overlies | Blaubok Conglomerate |
| Lithology | |
| Primary | Siltstone |
| Other | Sandstone, claystone, conglomerate |
| Location | |
| Coordinates | 27.0°S 15.3°E |
| Approximate paleocoordinates | 27.9°S 12.8°E |
| Region | ǁKaras Region |
| Country |  Namibia |
| Extent | Sperrgebiet |
| Type section | |
| Named for | Elizabeth Bay |
  Elisabeth Bay Formation (Namibia) | |
The following fossils are reported from the formation:[4][5][6]
- Mammals
- Afrosmilus africanus
- Apodecter stromeri[1]
- Bathyergoides neotertiarius[1]
- Diamantomys luederitzi[1]
- Leptoplesictis senutae
- Metapterodon kaiseri
- Miohyrax oswaldi[1]
- Namasector soriae
- Parapedetes namaquensis[1]
- Promicrogale namibiensis[7]
- Isohyaenodon sp.
- Ysengrinia sp.
- Viverridae indet.
- Reptiles
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