Kirusillas Formation

{{Infobox rockunit

| name = Kirusillas Formation

| image =

| caption =

| type = Geological formation

| period = Homerian

| age = Homerian
~{{fossil range|426|423}}

| prilithology = Black shale

| otherlithology =

| namedfor = Kirusillas

| namedby =

| region = Cochabamba & Potosí Departments

| country = Bolivia

| coordinates = {{coord|17.8|S|64.8|W|display=inline,title}}

| paleocoordinates = {{coord|52.8|S|121.7|W|display=inline}}

| unitof =

| subunits =

| underlies = Pampa & Guayabillas Formations

| overlies = Llallagua Formation

| thickness =

| extent = Cordillera Central & Oriental

| area =

| map = {{Location map+ | Bolivia

| relief = 1

| width = 250

| float = center

| places =

{{Location map~ | Bolivia

| lat_deg = -17.8

| lon_deg = -64.8

| mark = SpringGreen pog.svg

| marksize = 10

}}

{{Location map~ | Bolivia

| lat_deg = -19.6

| lon_deg = -66.7

| mark = SpringGreen pog.svg

| marksize = 10

}}

}}

| map_caption =

}}

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.96[https://paleobiodb.org/classic/displayCollResults?collection_no=26984 Pojo] at Fossilworks.org[https://paleobiodb.org/classic/displayCollResults?collection_no=146188 Hacienda 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