sentences:  Central American Seaway
  
  The Central American Seaway, also known as the Panamanic Inter-American and Proto-Caribbean Seaway, was a body of water that once separated North America from South America.It formed in the Mesozoic (200–154 Ma) during the breakup of the supercontinent Pangaea, and closed when the Isthmus of Panama was formed by volcanic activity in the late Pliocene (2.76–2.54 Ma).