Paso del Sapo Formation

{{Short description|Maastrichtian geologic formation of the Cañadón Asfalto Basin in Argentina}}

{{More citations needed|date=September 2022}}

{{Infobox rockunit

| name = Paso del Sapo Formation

| image =

| caption =

| type = Geological formation

| period = Maastrichtian

| age = Maastrichtian
~{{fossil range|70|66}}

| prilithology = Siltstone

| otherlithology =

| namedfor = Paso del Sapo

| namedby =

| region = Chubut Province

| country = Argentina

| coordinates = {{coord|42.7|S|70.0|W|display=inline,title}}

| paleocoordinates = {{coord|44.9|S|58.5|W|display=inline}}

| unitof =

| subunits =

| underlies = La Colonia & Lefipán Formations

| overlies = Cerro Barcino Formation

| thickness =

| extent = Cañadón Asfalto Basin

| area =

| map = {{Location map+ | Argentina

| relief = 1

| width = 250

| float = center

| places =

{{Location map~ | Argentina

| lat_deg = -42.7

| lon_deg = -70.0

| mark = Lightgreen pog.svg

| marksize = 12

}}

}}

| map_caption =

}}

The Paso del Sapo Formation is a Maastrichtian geologic formation of the Cañadón Asfalto Basin in Argentina. The siltstones of the formation were deposited in a lacustrine environment. Plesiosaur remains are among the fossils that have been recovered from its strata.