MustersanThe Mustersan age is a period of geologic time within the Eocene epoch of the Paleogene, used more specifically within the South American land mammal age classification. It follows the Casamayoran and precedes the Divisaderan age.EtymologyThis age is named after Lake Musters in the Golfo San Jorge Basin.FormationsFormationbold is typeCountryBasinNotesSarmiento FormationGolfo San Jorge BasinAbanico FormationAbanico BasinAndesitas Huancache FormationGolfo San Jorge BasinChota FormationBagua BasinGeste FormationPuna PlateauParacas FormationPisco BasinPozo FormationUcayali BasinSoncco FormationEastern Peruvian AndesVaca Mahuida FormationNeuquén BasinVentana FormationNeuquén BasinYahuarango Formation - Santa Rosa faunaUcayali Basin