The Mariana Islands (an aa the Marianas) are an arc-shaped airchipelago made up bi the summits o fifteen volcanic muntains in the north-wastren Paceefic Ocean atween the 12t an 21st parallels north an alang the 145t meridian east.
Coordinates: 16°37′N 145°37′E / 16.617°N 145.617°E / 16.617; 145.617