Moin Formation
Stratigraphic range: Late Pliocene-Early Pleistocene
Type	Formation
Unit of	Limón Group
Sub-units	Empalme, Lomas del Mar, Middle & Santa Rosa Members
Overlies	Río Banano Formation
Lithology
Primary	Siltstone, limestone, sandstone, claystone
Other	Mudstone, grainstone
Location
Region	Limón Province
Country	Costa Rica
Type section
Named for	Moin
Moin Formation (Costa Rica)

The Moin Formation is a geologic formation in Costa Rica. It preserves fossils dating back to the Late Pliocene to Early Pleistocene period.^[1]

• Cataetyx stringeri^[2]
• Engina moinensis^[3]

• List of fossiliferous stratigraphic units in Costa Rica

• Bernard Landau; Geerat J. Vermeij (2012). "The genera Engina and Ameranna nov. gen. (Mollusca: Gastropoda, Buccinoidea, Buccinidae, Pisaniinae) from the Western Atlantic Neogene". Cainozoic Research. 9 (1): 121–133.
• Schwarzhans, Werner; Aguilera, Órangel (2016), "Otoliths of the Ophidiiformes from the Neogene of tropical America", Palaeo Ichthyologica, 14: 91–124, retrieved 2019-02-09

• S. D. Cairns. 1995. New records of azooxanthellate stony corals (Cnidaria: Scleractinia and Stylasteridae) from the Neogene of Panama and Costa Rica. Proceedings of the Biological Society of Washington 108(3):533-550