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.Veizaga Saavedra et al., 2014, p.96Pojo at Fossilworks.orgHacienda de Tapacari, 10 km from Huari, 120 km S of Oruro at Fossilworks.org The formation is a potential source rock for shale oil and shale gas.Veizaga Saavedra et al., 2014, p.99
Fossil content The formation has provided the following fossils:
Ornatosinuitina reyesi Slimonia bolivianaKjellesvig-Waering, 1973 Styliolina sp. Lingulata indet.
See also List of fossiliferous stratigraphic units in Bolivia Lipeón Formation
References
Bibliography
Further reading C. J. Fischer. 1969. Deux bellerophontacées nouveaux de Bolive. Bulletin de Societé géologique, France 7:605-608