Jama Formation

{{Short description|Geological feature in Ecuador}}

{{Infobox rockunit

| name = Jama Formation

| image =

| caption =

| type = Geological formation

| age = Pliocene-Early Pleistocene
(Montehermosan-Ensenadan)
~{{fossil range|5.3|0.8}}

| period = Piacenzian

| prilithology = Claystone, sandstone

| otherlithology =

| namedfor = Jama

| namedby =

| region = Manabí Province

| country = {{ECU}}

| coordinates = {{coord|0.2|S|80.3|W|display=inline,title}}

| paleocoordinates = {{coord|0.3|S|79.9|W|display=inline}}

| unitof =

| subunits =

| underlies =

| overlies =

| thickness =

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| map = {{Location map+ | Ecuador

| relief = 1

| width = 250

| float = center

| places =

{{Location map~ | Ecuador

| lat_deg = -0.2

| lon_deg = -80.3

| mark = Yellow ffff80 pog.svg

| marksize = 12

}}

}}

| map_caption =

}}

The Jama Formation is a Pliocene to Early Pleistocene (Montehermosan to Ensenadan in the SALMA classification) geological formation in Ecuador. The claystones and sandstones were deposited in a coastal environment. The age of the Jama Formation is constrained by ⁴⁰Ar/³⁹Ar dating of tephra beds.[https://paleobiodb.org/classic/displayStrata?geological_group=&formation=Jama&group_formation_member=Jama Jama Formation] at Fossilworks.org The formation is correlated to the Charco Azul Formation of western Panama and southeastern Costa Rica.[https://paleobiodb.org/classic/displayCollResults?collection_no=130893 Charco Azul Formation] at Fossilworks.org