The Mustersan age is a period of geologic time (circa 38–35 Ma) within the Eocene epoch of the Paleogene, used more specifically within the South American land mammal age (SALMA) classification. It follows the Casamayoran and precedes the Divisaderan or Tinguirirican ages.
This age is named after Lake Musters in the Golfo San Jorge Basin.
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