page_title: Kirusillas Formation
section_title: Fossil content
hierarchical_section_title: Kirusillas Formation / Fossil content
caption_attribution_description: English: A map of the world as it appeared during the Early Silurian (440 ma). The image was made by Christopher Scotese and reprojected by me using G.Projector.
context_page_description: 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. The formation is a potential source rock for shale oil and shale gas.
context_section_description: The formation has provided the following fossils:
  Ornatosinuitina reyesi
  Slimonia boliviana
  Styliolina sp.
  Lingulata indet.
caption: Early Silurian (470 Ma)