Kirusillas Formation
Geologic formation in Bolivia
From Wikipedia, the free encyclopedia
The Kirusillas Formation is a Homerian geologic formation of central Bolivia. The formation comprises black shales, overlies the Llallagua Formation and is overlain by the Pampa and Guayabillas Formations. The Kirusillas Formation is laterally equivalent to the Lipeón Formation.[1][2][3] The formation is a potential source rock for shale oil and shale gas.[4]
| Kirusillas Formation | |
|---|---|
| Stratigraphic range: Homerian ~ | |
| Type | Geological formation |
| Underlies | Pampa & Guayabillas Formations |
| Overlies | Llallagua Formation |
| Lithology | |
| Primary | Black shale |
| Location | |
| Coordinates | 17.8°S 64.8°W |
| Approximate paleocoordinates | 52.8°S 121.7°W |
| Region | Cochabamba & Potosí Departments |
| Country | Bolivia |
| Extent | Cordillera Central & Oriental |
| Type section | |
| Named for | Kirusillas |
  Kirusillas Formation (Bolivia) | |
Fossil content
The formation has provided the following fossils:
- Ornatosinuitina reyesi
- Slimonia boliviana[5]
- Styliolina sp.
- Lingulata indet.