Fly–Digul shelf

…central mountain chain is the Fly-Digul shelf, a vast swampy plain crossed by numerous rivers including the Fly, Bian, Digul, Mapi, Pulau, and Lorentz. To the southeast the Owen Stanley Range extends about 200 miles (320 km) and forms a wide peninsula, separating the Solomon Sea to the north from…

…New Guinea plains, called the Fly-Digul shelf (named for the Fly and Digul rivers), are geologically stable.