Hidden Lake Formation
Geologic formation in Antarctica
From Wikipedia, the free encyclopedia
The Hidden Lake Formation is a Late Cretaceous geologic formation in Antarctica. The sandstones and siltstones of the formation were deposited in a deltaic environment.
| Hidden Lake Formation | |
|---|---|
| Stratigraphic range: Coniacian[1] | |
| Type | Geological formation |
| Unit of | Gustav Group |
| Underlies | Santa Marta Formation |
| Overlies | Whisky Bay Formation |
| Lithology | |
| Primary | Sandstone |
| Other | Siltstone |
| Location | |
| Coordinates | 63.0°S 57.0°W |
| Approximate paleocoordinates | 63.1°S 63.9°W |
| Region | James Ross Island, James Ross Island group |
| Country | Argentine Antarctica, British Antarctic Territory, Chilean Antarctic Territory |
| Type section | |
| Named for | Hidden Lake |
Map of James Ross Island group James Ross Island is number 2 | |
Indeterminate megalosaur remains have been recovered from it.[2] Also many plant fossils and ichnofossils of Planolites sp. and Palaeophycus sp. have been found in the formation.[3]
Paleofauna
- Megalosauroidea indet.[2]
- Palaeophycus sp.[3]
- Planolites sp.[3]
Flora
- Antarctoxylon mixai[4]
- Dicotylophyllum[5]
- Elatocladus cf. heterophylla[5]
- Lygodium sp.[5]
- Microphyllopteris sp.[5]