San Juan Formation

San Juan Formation may refer to:

• San Juan Formation, Argentina, an Ordovician geologic formation in Argentina
• San Juan Formation, Mexico, an Eocene geologic formation in Mexico
• San Juan Raya Formation, an Albian geologic formation in Mexico
• San Juan Terrace Formation, a Pleistocene geologic formation in Peru

See also

• San Juan volcanic field, in the San Juan Mountains, Colorado, U.S.